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highlightjs avatar

highlightjs/highlight.js

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24,825 stars·3,725 forks·JavaScript·bsd-3-clause·13 viewshighlightjs.org↗

Highlight.js

Highlight.js is a syntax highlighting library that automatically detects and applies color-coded styling to source code blocks within web pages. It functions as a language-agnostic formatting engine, utilizing a modular processor that applies consistent visual themes to diverse programming languages based on their specific grammatical rules. By decoupling the core parsing logic from language-specific definitions, the library provides a unified execution environment that operates without requiring internal knowledge of the target language.

The project is distinguished by its modular architecture, which allows developers to import only the specific language definitions required for their application, effectively minimizing bundle sizes. It employs a state-machine tokenizer to process raw text through nested states, enabling the accurate identification of complex language structures. Because the engine is platform-agnostic, it can be executed in both browser and server environments, delegating visual presentation to external stylesheets through generic CSS classes.

The library supports a wide range of integration strategies, including server-side rendering for consistent content delivery and client-side processing for dynamic updates. It offers performance-focused features such as web worker support to offload heavy processing tasks, ensuring that user interfaces remain responsive. Furthermore, the library provides compatibility with both modern and legacy module standards, along with plugins for common component-based frameworks to facilitate integration into existing application lifecycles.

Features

  • Syntax Highlighting - Automatically detects and applies color-coded styling to source code blocks.
  • Syntax Highlighters - Provides dynamic browser-side processing to apply visual styling to programming language structures within the document.
  • Syntax Highlighting - The library supports modular syntax highlighting, allowing developers to import only necessary language definitions to maintain small application bundle sizes while ensuring accurate rendering.
  • String Utilities - Applies consistent visual themes to diverse programming languages based on grammatical rules.
  • Parsers & Lexers - Provides a unified execution environment that applies rulesets to input text without internal language knowledge.

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  • Syntax Highlighting Integrations - Adds color-coded syntax formatting to text areas and code blocks.
  • Language Features - Separates syntax rules into independent modules to allow selective language support.
  • Runtime Environments - Decouples the parsing engine from platform-specific APIs to enable browser and server execution.
  • Server-Side Rendering Utilities - Processes raw text into styled HTML on the server for consistent presentation.
  • Rendering Debuggers - Executes syntax highlighting in background threads to maintain interface responsiveness.
  • Background Processing - The library supports web worker execution, allowing heavy syntax processing tasks to run in background threads to keep the main user interface responsive during updates.
  • Syntax Highlighting Styles - Maps code syntax tokens to generic CSS classes for external styling.
  • Bundle Optimizers - Enables efficient loading by allowing developers to include only necessary language definitions in the final application bundle.
  • Framework Plugins - Provides plugins for component-based frameworks to ensure consistent syntax rendering.

    • Star history

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    Frequently asked questions

    What does highlightjs/highlight.js do?

    Highlight.js is a syntax highlighting library that automatically detects and applies color-coded styling to source code blocks within web pages. It functions as a language-agnostic formatting engine, utilizing a modular processor that applies consistent visual themes to diverse programming languages based on their specific grammatical rules. By decoupling the core parsing logic from language-specific definitions, the library provides a unified execution environment that…

    What are the main features of highlightjs/highlight.js?

    The main features of highlightjs/highlight.js are: Syntax Highlighting, Syntax Highlighters, String Utilities, Parsers & Lexers, Syntax Highlighting Integrations, Language Features, Runtime Environments, Server-Side Rendering Utilities.

    What are some open-source alternatives to highlightjs/highlight.js?

    Open-source alternatives to highlightjs/highlight.js include: fish-shell/fish-shell — This project is an interactive command-line shell designed to provide a user-friendly terminal environment for system… nushell/nushell — Nushell is a cross-platform shell and programming language designed to treat all input and output as structured data… jqlang/jq — This project is a command-line processor designed for the parsing, filtering, and transformation of structured data… vanessa219/vditor — Vditor is a browser-based Markdown editor and rendering engine that supports multiple editing interfaces, including a… php/php-src — This project is the core source code for a general-purpose, server-side scripting language designed for web… tokio-rs/tokio — Tokio is an asynchronous runtime for the Rust programming language, designed to manage and execute concurrent tasks…

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