Code highlighter not working in the quill editor

Question

I followed the documentation of Quill, but the syntax highlighting is not working. By the way, even the example on the Quill playground webpage is not working, while the example on the Quill home page is working. Here is my code and a link to CodePen.

HTML

<div id="editor-container"><pre>for(int i=0;i<10;i++)
  printf ("Hello");</pre>
</div>

JS

var quill = new Quill('#editor-container', {
  modules: {
    toolbar: [
      [{ header: [1, 2, false] }],
      ['bold', 'italic', 'underline'],
      ['image', 'code-block']
    ]
  },
  placeholder: 'Compose an epic...',
  theme: 'snow'  // or 'bubble'
});

Here is a CodePen showing the issue: https://codepen.io/imabot2/pen/mdJwdZy

Answer 1

You need to include the Syntax Highlighter Module

Include HighLightJs ;

<!-- Local file -->
<script href="highlight.js"></script>

<!-- CloudFare CDN -->
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.18.1/highlight.min.js"></script>

Enable module;

var quill = new Quill('#editor-container', {
    modules: {
        syntax: true,                          # <-- Enable module
        toolbar: [
            [{ header: [1, 2, false] }],
            ['bold', 'italic', 'underline'],
            ['image', 'code-block']
        ]
    },
    placeholder: 'Compose an epic...',
    theme: 'snow'  // or 'bubble'
});

Updated codePen; https://codepen.io/0stone0/pen/poJwBzw