Syntax highlight any block on a Web Page
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I had the need to add syntax highlighting to a page, but I didn’t have the luxury of changing the markup.
Most syntax highlighting libraries, like Prism.js, force you to use a fixed structure like this:
<pre>
<code class="language-js">
...
</code>
</pre>
Citing this:
Prism does its best to encourage good authoring practices. Therefore, it only works with
elements, since marking up code without a
element is semantically invalid.
It’s all nice and idealistic and all but I had my code in a div
from an outside source. You force me that markup, but I don’t have that.
I finally found https://highlightjs.org/ that lets me apply syntax highlighting to any element I want on the page, by loading the library first and then calling:
document.addEventListener('DOMContentLoaded', () => {
document.querySelectorAll('.my-code-div').forEach((el) => {
hljs.highlightElement(el)
})
})
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