Prism HTML highlighter

Question

Prism HTML highlighter

32k views Asked by kajacx At 28 January 2013 at 09:54

I'm using Prism and its working well for CSS:

<pre><code class="language-css">p { color: red }</code></pre>

but i can't get it working for html:

<pre><code class="language-html"><p class="red">red text</p></code></pre>

I have 2 problems:

< and > are represented as tags, not as text, but i could replace it by < and >
More important, even replaced as shown in problem 1, the highliter will not highlight any code and everything is just black. Despite that it is working for CSS, whole code looks like this:

<!DOCTYPE html>
<html>
    <head>
        <link href="prism.css" rel="stylesheet" />
    </head>
    <body>
        <script src="prism.js"></script>
        <pre><code class="language-css">p { color: red }</code></pre>
    </body>
</html>

Thanks for any help.

Original Q&A

There are 6 answers

oehmaddin On 27 November 2020 at 07:45

I want to add that another very simple possibility is to use the archaic <xmp>-tag like so:

<pre><code class="language-html">
<xmp>
  <p>this markup is now rendered as expected although your IDE might be upset about you using that old tag</p>
</xmp>
</code></pre>

Adam On 09 January 2018 at 21:54

To solve issue 1):

You can use the unexcaped-markup plugin

This is how it works:

<script type="text/plain" class="language-markup">
   <p>Example</p>
</script>

To ignore first and last returns I would recommend using the normalize whitespace plugin.

To solve issue 2):

There exists no languages-html see http://prismjs.com/index.html#languages-list. HTML is a HyperTextMarkupLanguage so its included in language-markup. Thats what you have to use.

lewishole On 21 July 2021 at 04:56

I think Adam's answer should be the best solution in this case. I just elaborate more on the use for the unexcaped-markup plugin to make the HTML highlighter in the simplest way.

Since <script /> will only work on single line of code, therefore you may want to insert simple HTML-comment to escape all of your codes:

<pre class="language-markup"><code><!--
  <p>Example</p>
  <p>Example</p>
  <p>Example</p>
--></code></pre>

Everything inside the comment would be printed prettily. It's worth a try if you need to print you HTML markup by using Prism.

steve On 28 July 2016 at 11:10

The best solution is to save the html you want highlighted into a seperate file. You'll need to include the file highlight plugin into your js.

The syntax highlighting will be worked out from the extension

<pre data-src="assets/partials/picture.html"></pre>

Hardev On 24 March 2016 at 13:16

I had the same problem with the HTML. I didn't want to replace the <, > with &lt &gt so what I did was put the code inside textarea-elements inside a hidden div and once the page was loaded copied the contents of all textareas to code-elements. This way I was able to keep the code as it is and render it withou issues.

The obvious downside of course is that without JS there is no content but then again the highlighter wouldn't work either.

**Nathan Jones** · Accepted Answer · 2013-03-25 03:32:41

Use <code class="language-markup"> to style html code.

Also, you only need to escape the beginning of the tags with <, don't worry about the > characters. The easiest way is to paste your html code into the pre tag, then perform a find and replace for all < characters.

This should work:

<!DOCTYPE html>
<html>
    <head>
        <link href="prism.css" rel="stylesheet" />
    </head>
    <body>
        <script src="prism.js"></script>
        <pre><code class="language-markup">
            &lt;p class="red">red text &lt;/p>
        </code></pre>
    </body>
</html>

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Prism HTML highlighter

There are 6 answers

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