ansilight

Ansilight is a syntax highlighter for the terminal.
Includes 256 truecolor themes from highlight.js, looking the same as in the browser.

The original highlight.js sample, rendered by ansilight.

Features

• 192 languages via highlight.js
• 256 truecolor themes ported from highlight.js
• Supports compound and nested style scopes, e.g. variable.constant and meta keyword
• Configurable code block: background, padding, width
• Detects color scheme: light / dark
• Resolves theme based on detected scheme
• Automatically detects color support with graceful fallback

Install

npm install ansilight

Requires Node.js 18+. This package is ESM only.

Quick Start

Reproduces the screenshot above using the bundled atom-one-dark theme.

import ansilight from 'ansilight';
import theme from 'ansilight/themes/atom-one-dark';

const code =
`class MyClass {
  public static myValue: string;
  constructor(init: string) {
    this.myValue = init;
  }
}
import fs = require("fs");
module MyModule {
  export interface MyInterface extends Other {
    myProperty: any;
  }
}
declare magicNumber number;
myArray.forEach(() => { }); // fat arrow syntax`;

const output = ansilight(code, {
  lang: 'typescript', // optional, auto-detected if omitted
  theme,              // optional, uses 'default' theme if omitted
});

console.log(output);

Theme gallery

The package bundles 6 popular themes. All 256 themes are in the GitHub repository.

| Theme light | Theme dark | |---|---| | default (built-in) | dark | | atom-one-light | atom-one-dark | | github | github-dark |

More: full theme gallery | full documentation