Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server. It works with pretty much any markup, doesn’t depend on any framework and has automatic language detection.
Note: This branch is edited by Mensu to support line numbers.
To compile, you should have node.js installed first. Then run npm install to install dependent packages
Generally speaking, running node ./tools/build.js provides compiled files
There are several useful options:
-nget uncompressed version-tspecify target platform. Four expected choices:browser,cdn,node,all:commonto support commonly used languageslang1 lang2 ...commandnode ./tools/build.js python lesswould install python and less support
npm start is equivalent to node ./tools/build.js -n :common, namely supporting commonly used languages without compressing the generated files
Before compilation you are supposed to choose a theme you are fond of and edit its css files in ./src/style so as to make line numbers visible. I have done this for default and monokai-sublime styles, which you might want to refer to when you have trouble with editing css files
After compilation you may checkout ./build folder and get highlight.pack.js
The generated highlight.pack.js can be previewed by opening ./build/demo/index.html in a browser
- First Step: find selector
.hljs, replace the following rules
.hljs {
display: block;
overflow-x: auto;
...
}with
.hljs {
display: inline-block;
min-width: 100%;
box-sizing: border-box;
border-radius: 3px;
...
}namely:
.hljs {
/* display: block; */
/* overflow-x: auto; */
display: inline-block;
min-width: 100%;
box-sizing: border-box;
border-radius: 3px;
....
}- Last Step: paste the following rules into the CSS file
.hljs {
counter-reset: lines;
}
.hljs .line {
counter-increment: lines;
}
.hljs .line::before {
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;
content: counter(lines); text-align: right;
display: inline-block; width: 2em;
padding-right: 0.5em; margin-right: 0.5em;
color: #BBB; border-right: solid 1px;
}
.hljs-comment ~ .line {
color: #75715e;
}
.hljs-comment ~ .line::before {
font-style: normal;
}// highlightInit.js
hljs.configure({noLinenum: false}); // default to false. unnecessary here
// get the DOM elements to highlight
var selector = 'fill in with the selector of the code blocks to highlight';
var codeBlocks = document.querySelectorAll(selector);
// call hljs.highlightBlock to highlight
Array.prototype.slice.call(codeBlocks).forEach(function(oneBlock) {
hljs.highlightBlock(oneBlock);
// or
// hljs.addLinenum(oneBlock); // which simply adds line numbers without highlighting
});<head>
...
<link rel="stylesheet" href="/path/to/styles/edited-style.css">
...
</head>
<body>
...
<!-- elements to highlight -->
...
<script src="/path/to/highlight.pack.js"></script>
<script src="/path/to/highlightInit.js"></script>
...
</body>The bare minimum for using highlight.js on a web page is linking to the
library along with one of the styles and calling
initHighlightingOnLoad:
<link rel="stylesheet" href="/path/to/styles/default.css">
<script src="/path/to/highlight.pack.js"></script>
<script>hljs.initHighlightingOnLoad();</script>This will find and highlight code inside of <pre><code> tags; it tries
to detect the language automatically. If automatic detection doesn’t
work for you, you can specify the language in the class attribute:
<pre><code class="html">...</code></pre>The list of supported language classes is available in the class
reference. Classes can also be prefixed with either language- or
lang-.
To disable highlighting altogether use the nohighlight class:
<pre><code class="nohighlight">...</code></pre>When you need a bit more control over the initialization of
highlight.js, you can use the highlightBlock and configure
functions. This allows you to control what to highlight and when.
Here’s an equivalent way to calling initHighlightingOnLoad using
jQuery:
// hljs.configure({noLinenum: true}); // this setting is hide the line numbers
$(document).ready(function() {
$('pre code').each(function(i, block) {
// hljs.addLinenum(block); // simply add line numbers without highlighting
hljs.highlightBlock(block);
});
});You can use any tags instead of <pre><code> to mark up your code. If
you don't use a container that preserve line breaks you will need to
configure highlight.js to use the <br> tag:
hljs.configure({useBR: true});
$('div.code').each(function(i, block) {
hljs.highlightBlock(block);
});For other options refer to the documentation for configure.
You can run highlighting inside a web worker to avoid freezing the browser window while dealing with very big chunks of code.
In your main script:
addEventListener('load', function() {
var code = document.querySelector('#code');
var worker = new Worker('worker.js');
worker.onmessage = function(event) { code.innerHTML = event.data; }
worker.postMessage(code.textContent);
})In worker.js:
onmessage = function(event) {
importScripts('<path>/highlight.pack.js');
var result = self.hljs.highlightAuto(event.data);
postMessage(result.value);
}You can get highlight.js as a hosted, or custom-build, browser script or as a server module. Right out of the box the browser script supports both AMD and CommonJS, so if you wish you can use RequireJS or Browserify without having to build from source. The server module also works perfectly fine with Browserify, but there is the option to use a build specific to browsers rather than something meant for a server. Head over to the download page for all the options.
Don't link to GitHub directly. The library is not supposed to work straight from the source, it requires building. If none of the pre-packaged options work for you refer to the building documentation.
The CDN-hosted package doesn't have all the languages. Otherwise it'd be too big. If you don't see the language you need in the "Common" section, it can be added manually:
<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.4.0/languages/go.min.js"></script>On Almond. You need to use the optimizer to give the module a name. For example:
r.js -o name=hljs paths.hljs=/path/to/highlight out=highlight.js
Highlight.js is released under the BSD License. See LICENSE file for details.
The official site for the library is at https://highlightjs.org/.
Further in-depth documentation for the API and other topics is at http:https://highlightjs.readthedocs.io/.
Authors and contributors are listed in the AUTHORS.en.txt file.