Shiki is an advanced syntax highlighter designed to provide accurate and visually appealing code highlighting through the use of TextMate grammars.

This feature ensures that it aligns with the same syntax highlighting standards used by Visual Studio Code, which enhances both its reliability and familiarity for developers.

The tool is fully tree-shakable, meaning it's optimized for efficient loading and can run in various JavaScript environments, including browsers, Node.js, and even on platforms like Cloudflare Workers.

One of the key features of Shiki is its zero-runtime execution for code highlighting, which means it processes all syntax highlighting at build time, thereby reducing the load and execution time on the client-side.

This approach ensures a faster rendering of highlighted syntax and significantly improves performance by not shipping additional JavaScript for runtime execution.

Shiki is highly customizable, supporting various themes and the ability to define custom languages. It also integrates well with numerous tools and frameworks, making it versatile for different development environments and documentation needs.

Source