Insert Images in EJ2 JavaScript Markdown Editor Control

22 Mar 202510 minutes to read
The Markdown Editor allows users to insert images using the toolbar. This feature enables embedding images from online sources into the editor content.
Steps to Insert an Image

Follow these steps to add an image in the Markdown editor:
Click the Insert Image icon in the toolbar.
Enter the URL of the image from an online source.
Click the Insert button in the image dialog.
The image will be added to the editor content at the cursor position.
The following example demonstrates how to enable image insertion in the Markdown Editor.
index.js
index.html
ej.base.enableRipple(true);

var textArea;
var mdsource;
var htmlPreview;

var markdownRTE = new ej.richtexteditor.RichTextEditor({
  value: `In Rich Text Editor, you click the toolbar buttons to format the words and the changes are visible immediately. Markdown is not like that. When you format the word in Markdown format, you need to add Markdown syntax to the word to indicate which words and phrases should look different from each other. Rich Text Editor supports markdown editing when the editorMode set as **markdown** and using both *keyboard interaction* and *toolbar action*, you can apply the formatting to text. You can add our own custom formation syntax for the Markdown formation, [sample link](https://ej2.syncfusion.com/home/). The third-party library <b>Marked</b> is used in this sample to convert markdown into HTML content.`,
  height: 250,
  editorMode: 'Markdown',
  toolbarSettings: {
    items: [
      'Image',
      {
        tooltipText: 'Preview',
        template:
          '<button id="preview-code" class="e-tbar-btn e-control e-btn e-icon-btn"  aria-label="Preview Code">' +
          '<span class="e-btn-icon e-md-preview e-icons"></span></button>',
      },
    ],
  },
  created: function () {
    textArea = markdownRTE.contentModule.getEditPanel();
    textArea.addEventListener('keyup', function (e) {
      markdownConversion();
    });
    mdsource = document.getElementById('preview-code');
    mdsource.addEventListener('click', function (e) {
      fullPreview();
      if (e.currentTarget.classList.contains('e-active')) {
        markdownRTE.disableToolbarItem(['CreateTable']);
      } else {
        markdownRTE.enableToolbarItem(['CreateTable']);
      }
    });
  },
});
markdownRTE.appendTo('#markdown-editor');

function markDownConversion() {
  if (mdsource.classList.contains('e-active')) {
    var id = markdownRTE.getID() + 'html-view';
    var htmlPreview = document.body.querySelector('#markdownRTEhtml-preview');
    htmlPreview.innerHTML = marked(
      markdownRTE.contentModule.getEditPanel().value
    );
  }
}

function fullPreview(e) {
  var id = markdownRTE.getID() + 'html-preview';
  var htmlPreview = markdownRTE.element.querySelector('#' + id);
  var previewTextArea = markdownRTE.element.querySelector('.e-rte-content');
  if (mdsource.classList.contains('e-active')) {
    mdsource.classList.remove('e-active');
    mdsource.parentElement.title = 'Preview';
    textArea.style.display = 'block';
    htmlPreview.style.display = 'none';
    previewTextArea.style.overflow = 'hidden';
  } else {
    mdsource.classList.add('e-active');
    if (!htmlPreview) {
      htmlPreview = ej.base.createElement('div', {
        className: 'e-content e-pre-source',
      });
      htmlPreview.id = id;
      textArea.parentNode.appendChild(htmlPreview);
      previewTextArea.style.overflow = 'auto';
    }
    if (previewTextArea.style.overflow === 'hidden') {
      previewTextArea.style.overflow = 'auto';
    }
    textArea.style.display = 'none';
    htmlPreview.style.display = 'block';
    htmlPreview.innerHTML = marked(
      markdownRTE.contentModule.getEditPanel().value
    );
    mdsource.parentElement.title = 'Code View';
  }
}

loadExternalFile();
// Dynamically load the marked.js file
function loadExternalFile() {
  var script = document.createElement('script');
  script.src = 'https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.19/marked.js';
  document.getElementsByTagName('head')[0].appendChild(script);
}
<!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/ej2/30.1.37/ej2-base/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-richtexteditor/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-popups/styles/material.css" rel="stylesheet">
     <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/30.1.37/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
   
<script src="https://cdn.syncfusion.com/ej2/30.1.37/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="markdown-editor"></div>
    </div>
    <style>
        .e-richtexteditor textarea.e-content {
            float: left;
            border-right: 1px solid rgba(0, 0, 0, 0.12);
        }
        .e-richtexteditor .e-rte-content .e-content{
            min-height: 150px;
        }
    
        .e-richtexteditor .e-rte-content {
            overflow: hidden;
        }
    
        .e-icon-btn.e-active .e-md-preview::before {
            content: '\e350';
        }
    
        .e-icon-btn .e-md-preview::before {
            content: '\e345';
        }
    
        .e-rte-content .e-content {
            float: right;
            width: 50%;
            overflow: auto;
            height: inherit;
            padding: 8px;
            height: 100%;
        }
    
        .e-rte-content .e-content.e-pre-source {
            width: 100%;
        }
    
        .highcontrast .e-richtexteditor textarea.e-content {
            border-right: 1px solid #fff;
        }
    
        .sb-header {
            z-index: 100;
        }
    </style>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>