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Cover image for JavaScript Syntax Highlighter
Victor Ribeiro
Victor Ribeiro

Posted on • Originally published at

JavaScript Syntax Highlighter

JavaScript Syntax Highlighter

Alt Text

Live Version

How to use it

Add the file syntax.min.js to the end of your code and it will automatically highlight every <code> tag that you have in your page. Or use the defer attribute:

<script src="syntax.min.js" defer></script>
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The script will create <spam> tag for every reserved word, variable, methods and numbers so you can target them with CSS.

code {
  font-family: Consolas,"courier new";
  color: #EEE;
  background-color: #333;
  padding: 2px;
  font-size: 105%;
  display: block;
  white-space: pre;
  counter-reset: line;

code > div {
  counter-increment: line;
  display: block;
  min-height: 1em;

code > div::before {
  content: counter(line) '\A0';
  display: inline-block;
  width: 4ch;
  text-align: left;
  -webkit-select: none;
  color: #666;

.reserved {
  font-weight: bold;
  color: #55C;

.methods {
  font-weight: bold;
  color: green;

.variable {
  color: orange;

.comment {
  color: gray;

.number {
  color: red;
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Fell free to change anything you like to better suit your needs.

Source code here.

Top comments (0)

Need a better mental model for async/await?

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