Image in EJ2 TypeScript Rich text editor control

2 Feb 202420 minutes to read

Rich Text Editor allows to insert images from online source as well as local computer where you want to insert the image in your content. For inserting the image to the Rich Text Editor, the following list of options have been provided in the insertImageSettings

Options	Description
allowedTypes	Specifies the extensions of the image types allowed to insert on bowering and passing the extensions with comma separators. For example, pass allowedTypes as .jpg and .png.
display	Sets the default display for an image when it is inserted in to the Rich Text Editor. Possible options are: ‘inline’ and ‘break’.
width	Sets the default width of the image when it is inserted in the Rich Text Editor.
height	Sets the default height of the image when it is inserted in the Rich Text Editor.
saveUrl	Provides URL to map the action result method to save the image.
path	Specifies the location to store the image.

Rich Text Editor features are segregated into individual feature-wise modules. To use image and link tool, inject image module using the RichTextEditor.Inject(Image).

Upload options

Through the browse option, select the image from the local machine and insert into the Rich Text Editor content.

If the path field is not specified in the insertImageSettings, the image will be transferred into base 64 and blob url for the image will be created and the generated url will be set to the src property of <img> tag.

<img src="blob:http://ej2.syncfusion.com/3ab56a6e-ec0d-490f-85a5-f0aeb0ad8879" >

If you want to insert a lot of tiny images in the editor and don’t want a specific physical location for saving images, you can opt to save format as Base64.

In the following sample, the image has been loaded from the local machine and it will be saved in the given location.

index.ts
index.html
import { RichTextEditor, Toolbar, Image,  Link, HtmlEditor, QuickToolbar, NodeSelection } from '@syncfusion/ej2-richtexteditor';
RichTextEditor.Inject(Toolbar, Image,  Link, HtmlEditor, QuickToolbar );

let defaultRTE: RichTextEditor = new RichTextEditor({
        toolbarSettings: {
        items: ['Image']}
});
defaultRTE.appendTo('#defaultRTE');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 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="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/material.css" rel="stylesheet" />
     <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='defaultRTE'>
            <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>Key features:</b></p>
              <ul><li><p>Provides &lt;IFRAME&gt; and &lt;DIV&gt; modes</p></li>
              <li><p>Capable of handling markdown editing.</p></li>
              <li><p>Contains a modular library to load the necessary functionality on demand.</p></li>
              <li><p>Provides a fully customizable toolbar.</p></li>
              <li><p>Provides HTML view to edit the source directly for developers.</p></li>
              <li><p>Supports third-party library integration.</p></li>
              <li><p>Allows preview of modified content before saving it.</p></li>
              <li><p>Handles images, hyperlinks, video, hyperlinks, uploads, etc.</p></li>
              </ul>
        </div>
    </div>
    <style>
        .e-rte-quick-popup .e-rte-quick-toolbar .e-rotate-left::before {
            content: "\e76e";
        }
    
        .e-rte-quick-popup .e-rte-quick-toolbar .e-rotate-right::before {
            content: "\e726";
        }
    </style>
</body>

</html>

Image delete

To remove an image from the Rich Text Editor content, select the image and click Remove tool from the quick toolbar. It will delete the image from the Rich Text Editor content as well as from the service location if the removeUrl is given.

Once you select the image from the local machine, the URL for the image will be generate. From there, you can remove the image from the service location by clicking the cross icon.

RTE Image delete

The following sample explains, how to configure removeUrl to remove a saved image from the remote service location, when the following image remove actions are performed:

delete key action.
backspace key action.
Removing uploaded image file from the insert image dialog.
Deleting image using the quick toolbar remove option.

index.ts
index.html
import { RichTextEditor, HtmlEditor, Toolbar, QuickToolbar, Image, FileManager } from '@syncfusion/ej2-richtexteditor';
RichTextEditor.Inject(HtmlEditor, Toolbar, QuickToolbar, Image, FileManager);

let defaultRTE: RichTextEditor = new RichTextEditor({
    insertImageSettings: {
        saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
        removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove'
    },
    toolbarSettings: {
        items: ['Image']
    }
});
defaultRTE.appendTo('#defaultRTE');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 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="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='defaultRTE'>
            <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>Key features:</b></p>
            <ul>
                <li><p>Provides &lt;IFRAME&gt; and &lt;DIV&gt; modes</p></li>
                <li><p>Capable of handling markdown editing.</p></li>
                <li><p>Contains a modular library to load the necessary functionality on demand.</p></li>
                <li><p>Provides a fully customizable toolbar.</p></li>
                <li><p>Provides HTML view to edit the source directly for developers.</p></li>
                <li><p>Supports third-party library integration.</p></li>
                <li><p>Allows preview of modified content before saving it.</p></li>
                <li><p>Handles images, hyperlinks, video, hyperlinks, uploads, etc.</p></li>
            </ul>
        </div>
    </div>
</body>

</html>

Insert from web

To insert an image from the online source like Google, Ping, etc., you should enable the image tool on the editor’s toolbar. By default, the image tool opens a simple dialog which allows you to insert an image from online source.

RTE Image insert

Dimension

Sets the default width and height of the image when it is inserted in the Rich Text Editor using width and height of insertImageSettings.

Through the quickToolbar, also you can change the width and height using Change Size option. Once click into the option. The Image Size dialog will open as below. In that specify the width and height of the image in pixel.

RTE Image dimension

Caption and Alt Text

Image caption and alternative text can be specified for the Inserted image in the Rich Text Editor through the quickToolbar options such as Image Caption and Alternative Text.

Through the Alternative Text option, set the alternative text for the image, when the image is not upload successfully into the Rich Text Editor.

By clicking the Image Caption, the image will get wrapped in an image element with a caption. Then, you can type caption content inside the Rich Text Editor.

Display position

Sets the default display for an image when it is inserted in the Rich Text Editor using display field in insertImageSettings. It has two possible options: inline and break.

let defaultRTE: RichTextEditor = new RichTextEditor({
    insertImageSettings: {
      display: 'inline'
    }
});
defaultRTE.appendTo('#defaultRTE');

Image with link

The hyperlink itself can be an image in Rich Text Editor. If the image given as hyperlink, the remove, edit, and open link will be added to the quick toolbar of image. For further details about link, see the link documentation.

RTE image with link

Resize

Rich text editor has a built-in image inserting support. The resize points will be appearing on each corner of image when focus. So, users can resize the image using mouse points or thumb through the resize points easily. Also, the resize calculation will be done based on aspect ratio.

RTE image resize

Drag and Drop

By default, the Rich Text Editor allows you to insert images by drag-and-drop from the local file system such as Windows Explorer into the content editor area. And, you can upload the images to the server before inserting into the editor by configuring the saveUrl property. The images can be repositioned anywhere within the editor area by dragging and dropping the image.

In the following sample, you can see feature demo.

index.ts
index.html
import { RichTextEditor, Toolbar, Image,  Link, HtmlEditor, QuickToolbar, NodeSelection } from '@syncfusion/ej2-richtexteditor';
RichTextEditor.Inject(Toolbar, Image,  Link, HtmlEditor, QuickToolbar );

let defaultRTE: RichTextEditor = new RichTextEditor({
       insertImageSettings :{
    saveUrl : 'https://aspnetmvc.syncfusion.com/services/api/uploadbox/Save'
  }
});
defaultRTE.appendTo('#defaultRTE');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 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="index.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-richtexteditor/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-navigations/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-popups/styles/material.css" rel="stylesheet" />
     <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="https://cdn.syncfusion.com/ej2/27.2.2/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='defaultRTE'>
            <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>Key features:</b></p>
              <ul><li><p>Provides &lt;IFRAME&gt; and &lt;DIV&gt; modes</p></li>
              <li><p>Capable of handling markdown editing.</p></li>
              <li><p>Contains a modular library to load the necessary functionality on demand.</p></li>
              <li><p>Provides a fully customizable toolbar.</p></li>
              <li><p>Provides HTML view to edit the source directly for developers.</p></li>
              <li><p>Supports third-party library integration.</p></li>
              <li><p>Allows preview of modified content before saving it.</p></li>
              <li><p>Handles images, hyperlinks, video, hyperlinks, uploads, etc.</p></li>
              </ul>
        </div>
    </div>
    <style>
        .e-rte-quick-popup .e-rte-quick-toolbar .e-rotate-left::before {
            content: "\e76e";
        }
    
        .e-rte-quick-popup .e-rte-quick-toolbar .e-rotate-right::before {
            content: "\e726";
        }
    </style>
</body>

</html>

Drag and drop with specific extension images

You can allow the specific images alone to be uploaded using the the allowedTypes property. By default, the Rich Text Editor allows the JPG, JPEG, and PNG formats. You can configure this formats as follows.

    insertImageSettings: {
      allowedTypes: ['.jpg']
    }

Prevent drag and drop action

You can prevent drag-and-drop action by setting the actionBegin argument cancel value to true. The following code shows how to prevent the drag-and-drop.

    actionBegin: function (args: any): void {
        if(args.type === 'drop' || args.type === 'dragstart') {
            args.cancel =true;
        }
    }