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Miscellaneous in Angular RichTextEditor component

Placeholder

Specifies the placeholder for the Rich Text Editor’s content used when the Rich Text Editor body is empty through the placeholder property.

Through the e-rte-placeholder class to define our custom font family, font color, and styles to the placeholder text.

.e-richtexteditor .e-rte-placeholder {
    font-family: monospace;
}
Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService } from '@syncfusion/ej2-angular-richtexteditor';
@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor id='defaultRTE' placeholder='Type Something'></ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService]
})
export class AppComponent  {
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Character count

The Rich Text Editor automatically counts the number of characters in the content are while typing using the showCharCount property. The characters count displayed at the bottom of the editor. You can limit the number of characters in your content using the maxLength property. By default, the editor sets the characters limit value is infinity.

The character count color will be modified based on the characters in the RichTextEditor.

Status Description
normal Till 70% of given maxLength count reach, character count color is black.
warning Once the number of character count in the Rich Text Editor reached 70% of given maxLength count, the character count color will be orange, indicating that, the Rich Text Editor value going to reach the maximum count.
error Once the number of character count in the Rich Text Editor reached 90% of given maxLength count, the character count color will be red, indicating that, the Rich Text Editor value reached the maximum count.

To use quick Character Count feature, inject CountService in the provider section of AppModule.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService, CountService } from '@syncfusion/ej2-angular-richtexteditor';
@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor id='defaultRTE' [showCharCount]='true' [maxLength]='maxLength'></ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService, CountService]
})
export class AppComponent  {
    public maxLength = 2000;
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Code view

RichTextEditor includes the ability for users to directly edit HTML code via Source View in the text area. If you made any modification in Source view directly, the changes will be reflected in the Rich Text Editor’s content. So, the users will have more flexibility over the content they have created.

This sample used Code mirror plugin helps to highlight the HTML content and when changes happens in code view, the same has been reflected in preview mode.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component, ViewChild, AfterViewInit } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService} from '@syncfusion/ej2-angular-richtexteditor';
import { RichTextEditorComponent, CountService} from '@syncfusion/ej2-angular-richtexteditor';
import { createElement } from '@syncfusion/ej2-base';
import * as CodeMirror from 'codemirror';


@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor #toolsRTE id='alltoolRTE' [toolbarSettings]='tools'
    [showCharCount]='true' (actionComplete)='actionCompleteHandler($event)' [maxLength]='maxLength'>
            <ng-template #valueTemplate>
                <p>The Rich Text Editor is WYSIWYG ("what you see is what you get") editor useful to create and edit content and return
                the valid <a href="https://ej2.syncfusion.com/home/" target="_blank">HTML markup</a> or
                <a href="https://ej2.syncfusion.com/home/" target="_blank">markdown</a> of the content</p>

                <p><b>Toolbar</b></p>
                <ol>
                    <li>
                      <p> Toolbar contains commands to align the text, insert link, insert image, insert list, undo/redo operations, HTML view, etc </p>
                    </li>
                    <li>
                        <p> Toolbar is fully customizable </p>
                    </li>
                </ol>
                <p><b>Links</b></p>
                <ol>
                    <li>
                        <p>You can insert a hyperlink with its corresponding dialog </p>
                    </li>
                    <li>
                        <p>Attach a hyperlink to the displayed text. </p>
                    </li>
                    <li>
                        <p> Customize the quick toolbar based on the hyperlink </p>
                    </li>
                </ol>
                <p><b>Image.</b></p>
                <ol>
                    <li>
                        <p> Allows you to insert images from an online source as well as the
                        local computer </p>
                    </li>
                    <li>
                        <p> You can upload an image </p>
                    </li>
                    <li>
                        <p>Provides an option to customize quick toolbar for an image </p>
                    </li>
                </ol>
            </ng-template>
        </ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService, CountService]
})
export class AppComponent implements AfterViewInit  {
    @ViewChild('toolsRTE') public rteObj: RichTextEditorComponent;
    public tools: object = {
        items: ['Bold', 'Italic', 'Underline', 'StrikeThrough',
        'FontName', 'FontSize', 'FontColor', 'BackgroundColor',
        'LowerCase', 'UpperCase', '|',
        'Formats', 'Alignments', 'OrderedList', 'UnorderedList',
        'Outdent', 'Indent', '|',
        'CreateLink', 'Image', '|', 'ClearFormat', 'Print',
        'SourceCode', 'FullScreen', '|', 'Undo', 'Redo']
    };
    public maxLength: number = 1000;
    public textArea: HTMLElement;
    public myCodeMirror: any;
  ngAfterViewInit(): void {
    let rteObj: RichTextEditorComponent = this.rteObj;
    setTimeout(() => { this.textArea = rteObj.contentModule.getEditPanel() as HTMLElement; }, 600);
}
public mirrorConversion(e?: any): void {
    let id: string = this.rteObj.getID() + 'mirror-view';
    let mirrorView: HTMLElement = this.rteObj.element.querySelector('#' + id) as HTMLElement;
    let charCount: HTMLElement = this.rteObj.element.querySelector('.e-rte-character-count') as HTMLElement;
    if (e.targetItem === 'Preview') {
        this.textArea.style.display = 'block';
        mirrorView.style.display = 'none';
        this.textArea.innerHTML = this.myCodeMirror.getValue();
        charCount.style.display = 'block';
    } else {
        if (!mirrorView) {
            mirrorView = createElement('div', { className: 'e-content' });
            mirrorView.id = id;
            this.textArea.parentNode.appendChild(mirrorView);
        } else {
            mirrorView.innerHTML = '';
        }
        this.textArea.style.display = 'none';
        mirrorView.style.display = 'block';
        this.renderCodeMirror(mirrorView, this.rteObj.value);
        charCount.style.display = 'none';
    }
}

public renderCodeMirror(mirrorView: HTMLElement, content: string): void {
    this.myCodeMirror = CodeMirror(mirrorView, {
        value: content,
        lineNumbers: true,
        mode: 'text/html',
        lineWrapping: true,

    });
}
public actionCompleteHandler(e: any): void {
    if (e.targetItem && (e.targetItem === 'SourceCode' || e.targetItem === 'Preview')) {
        (this.rteObj.sourceCodeModule.getPanel() as HTMLTextAreaElement).style.display = 'none';
        this.mirrorConversion(e);
    } else {
        setTimeout(() => { this.rteObj.toolbarModule.refreshToolbarOverflow(); }, 400);
    }
}
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Undo/redo manager

Undo and redo tools allow you to edit the text by disregard/cancel the recently made changes and restore it to previous state. It is a useful tool to restore the performed action which got changed by mistake. By default, upto 30 actions can be undo/redo in the editor.

To undo and redo operations, do one of the following:

  • Press the undo/redo button on the toolbar.
  • Press the Ctrl + Z/Ctrl + Y combination on the keyboard.

Customize the undo/redo step count using the undoRedoSteps property. By default, undo/redo actions take 300ms time interval for store the action to the undoRedoManager. The time interval can be customized by using the undoRedoTimer.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService, CountService } from '@syncfusion/ej2-angular-richtexteditor';

@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor id='defaultRTE' [toolbarSettings]='tools' [undoRedoSteps] ='steps' [undoRedoTimer]='timer'>
               </ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService, CountService]
})
export class AppComponent  {
    public tools = {items: ['Undo', 'Redo']};
    public steps = 50;
    public timer = 400;
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Prevention of cross-site scripting (XSS)

The Rich Text Editor allow the users to edit the content with security by preventing cross-site scripting (XSS). By default, provided built-in support to remove the elements from editor content which cause XSS attack. The editor removes the elements based on the attributes if there is possible to execute script.

In the following sample, removed script tag and onmouseover attribute from content of the Rich Text Editor.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService } from '@syncfusion/ej2-angular-richtexteditor';
@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor id='defaultRTE' [value]='rteValue'></ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService]
})
export class AppComponent  {
    public rteValue: string = `<div onmouseover='javascript:alert(1)'>Prevention of Cross Sit Scripting (XSS) </div><script>alert('hi')</script>`;
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

It’s only applicable to editorMode as HTML.

Custom cross-site scripting

You can also filter the elements and attributes additionally which cause the XSS attack through beforeSanitizeHtml event. Return the value from the event argument helper function to apply in the editor. If you want to prevent the built-in support and make own cross-site scripting rules, set cancel argument as true.

The following sample demonstrate how to filter script tag from value.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, HtmlEditorService, BeforeSanitizeHtmlArgs } from '@syncfusion/ej2-angular-richtexteditor';
import { detach } from '@syncfusion/ej2-base';

@Component({
    selector: 'app-root',
    template: `<ejs-richtexteditor id='defaultRTE' [value]='rteValue' (beforeSanitizeHtml)='onBeforeSanitizeHtml($event)'></ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, HtmlEditorService]
})
export class AppComponent  {
    public rteValue:string =`<div>Prevention of Cross Sit Scripting (XSS)</div><script>alert('hi')</script>`;
    public onBeforeSanitizeHtml(e: BeforeSanitizeHtmlArgs): void {
        e.helper = (value: string) => {
            e.cancel = true;
            let temp: HTMLElement = document.createElement('div');
            temp.innerHTML = value;
            let scriptTag: HTMLElement = temp.querySelector('script');
            if (scriptTag) {
                detach(scriptTag);
            }
            return temp.innerHTML;
      }
    }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';
import { DialogModule } from '@syncfusion/ej2-angular-popups';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule,
        DialogModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/javascript.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/css.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/xml.js" type="text/javascript"></script>
    <script src="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/htmlmixed.js" type="text/javascript"></script>
    <link href="https://jsplayground.syncfusion.com/16.1.0.24/scripts/web/codemirror/codemirror.min.css" rel="stylesheet" />
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
     .e-code-mirror::before {
        content: '\e345';
    }
    .CodeMirror-linenumber,
    .CodeMirror-gutters {
        display: none;
    }

    #special_char,
    .char_block {
        display: inline-block;
    }
    .char_block.e-active {
        /* box-shadow: inset 3px 3px 7px 0px; */
        outline: 1.5px solid;
    }

    .char_block {
        width: 30px;
        height: 30px;
        line-height: 30px;
        margin: 0 5px 5px 0;
        text-align: center;
        vertical-align: middle;
        border: 1px solid #DDDDDD;
        font-size: 20px;
        cursor: pointer;
        user-select: none;
    }

    #custom_tbar,
    #custom_tbar div{
        cursor: pointer;
    }


    #rteSection {
        height: 500px;
    }
  .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-left::before {
        content: "\e76e";
    }

    .e-rte-quick-popup .e-rte-quick-toolbar .e-roatate-right::before {
        content: "\e726";
    }

    .e-richtexteditor textarea.e-content {
      float: left;
    }
    .e-richtexteditor .e-rte-content {
      overflow: hidden;
    }
    .e-rte-content .e-content.e-pre-source{
      width: 100%;
    }

    .property-panel-content td{
        width: 50%;
    }
    .property-panel-content td div {
        padding-left: 10px;
        padding-top: 10px;
    }

    .e-icon-btn.e-active .e-md-preview::before {
        content: '\e350';
    }

	.e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
	}
    .e-icon-btn.e-active .e-md-preview::before,
    #mdCustom .e-icon-btn.e-active .e-md-preview.e-icons::before {
		content: '\e350';
	}
	#mdCustom .e-icon-btn .e-md-preview.e-icons::before {
		content: '\e345';
    }

    #rteDialog.e-dialog .e-dlg-content {
        padding: 0px 0px 5px 16px;
    }
    #custom_tbar .e-tbar-btn-text {
        font-size: 16px;
    }
    .e-bigger #custom_tbar .e-tbar-btn-text {
        font-size: 18px;
    }

    @media (min-width: 320px) and (max-width: 480px) {
        .fabric.e-bigger #rteDialog {
            min-width: 281px;
        }

        .fabric #rteDialog {
            min-width: 241px;
        }

        .bootstrap.e-bigger #rteDialog,
        .bootstrap #rteDialog {
            min-width: 223px;
        }

        .highcontrast.e-bigger #rteDialog {
            min-width: 283px;
        }
        .highcontrast #rteDialog {
            min-width: 243px;
        }
        .material #rteDialog {
            min-width: 224px;
        }
        .material.e-bigger #rteDialog {
            min-width: 236px;
        }
    }

</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Resizable support

This feature allows the editor to be resized dynamically. The users can enable or disable this feature using the enableResize property in the Rich Text Editor. If enableResize is set to true, the Rich Text Editor component creates grip at the bottom right corner, which allows resizing the component in the diagonal direction. The following sample demonstrates the resizable feature.

Enabling the resizable support

To render the Rich Text Editor in the resizable mode, set the enableResize property to true. The above feature is segregated into individual feature-wise module. To use Resizable feature, inject ResizeService in the provider section of AppModule.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, ResizeService, HtmlEditorService } from '@syncfusion/ej2-angular-richtexteditor';
@Component({
    selector: 'app-root',
        template: `<ejs-richtexteditor id='defaultRTE' [enableResize]="true">
        <ng-template #valueTemplate>
            <p>The Rich Text Editor component is WYSIWYG ("what you see is what you get") editor that provides the best user experience to create and update the content.
                Users can format their content using standard toolbar commands.</p>
        </ng-template>
    </ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, ResizeService, HtmlEditorService]
})
export class AppComponent {
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RichTextEditorAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
    #loader {
        color: #008cff;
        font-family:  'Helvetica Neue','calibiri';
        font-size: 16px;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }
</style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>

Specifying the Minimum and Maximum width and height for Resize

To have a restricted resizable area for the Rich Text Editor, you need to specify the min-width, max-width, min-height, and max-height CSS properties for the control’s wrapper element. By default, the control is capable of resizing upto the current viewport. The e-richtexteditor CSS class will be available in the component’s wrapper and can be used for applying the above mentioned styles.

Source
Preview
app.component.ts
app.module.ts
main.ts
index.html
import { Component } from '@angular/core';
import { ToolbarService, LinkService, ImageService, ResizeService, HtmlEditorService } from '@syncfusion/ej2-angular-richtexteditor';
@Component({
    selector: 'app-root',
        template: `<ejs-richtexteditor id='defaultRTE' [enableResize]="true">
        <ng-template #valueTemplate>
            <p>The Rich Text Editor component is WYSIWYG ("what you see is what you get") editor that provides the best user experience to create and update the content.
                Users can format their content using standard toolbar commands.</p>
        </ng-template>
    </ejs-richtexteditor>`,
    providers: [ToolbarService, LinkService, ImageService, ResizeService, HtmlEditorService]
})
export class AppComponent {
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RichTextEditorAllModule } from '@syncfusion/ej2-angular-richtexteditor';
import { ButtonModule } from '@syncfusion/ej2-angular-buttons';
import { AppComponent } from './app.component';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        ButtonModule,
        RichTextEditorAllModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion Angular Rich Text Editor</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/core.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.9.0/zone.min.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <style>
        #loader {
            color: #008cff;
            font-family: 'Helvetica Neue', 'calibiri';
            font-size: 16px;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    .e-richtexteditor {
        min-width: 200px;
        max-width: 800px;
        min-height: 100px;
        max-height: 300px;
    }
    </style>
</head>

<body>
    <app-root>
        <div id='loader'>Loading....</div>
    </app-root>
</body>

</html>