Lets see what we can do with rehype pretty code

code rehype pretty mdx

Syntax highlighting, line numbers, line highlights, word highlights

rehype-pretty-code is a Rehype plugin powered by the shiki syntax highlighter that provides beautiful code blocks for Markdown or MDX. It works on both the server at build-time (avoiding runtime syntax highlighting) and on the client for dynamic highlighting.

Editor-Grade Highlighting

Enjoy the accuracy and granularity of VS Code's syntax highlighting engine and the popularity of its themes ecosystem — use any VS Code theme you want!

Line Numbers and Line Highlighting

Draw attention to a particular line of code.

import { useFloating } from "@floating-ui/react";
 
function MyComponent() {
  const { refs, floatingStyles } = useFloating();
 
  return (
    <>
      <div ref={refs.setReference} />
      <div ref={refs.setFloating} style={floatingStyles} />
    </>
  );
}

Word Highlighting

Draw attention to a particular word or series of characters.

import { useFloating } from "@floating-ui/react";
 
function MyComponent() {
  const { refs, floatingStyles } = useFloating();
 
  return (
    <>
      <div ref={refs.setReference} />
      <div ref={refs.setFloating} style={floatingStyles} />
    </>
  );
}

ANSI Highlighting

[0;36m  vite v5.0.0[0;32m dev server running at:[0m
 
  > Local: [0;36mhttp://localhost:[0;36;1m3000[0;36m/[0m
  > Network: [0;2muse `--host` to expose[0m
 
  [0;36mready in 125ms.[0m
 
[0;2m8:38:02 PM[0m [0;36;1m[vite][0m [0;32mhmr update [0;2m/src/App.jsx

Inline ANSI: > Local: [0;36mhttp://localhost:[0;36;1m3000[0;36m/[0m

Kitchen Sink Meta Strings

isEven.js
function isEven(number) {
  if (number === 1) {
    return false;
  } else if (number === 2) {
    return true;
  } else if (number === 3) {
    return false;
  } else if (number === 4) {
    return true;
  } else if (number === 5) {
    return false;
  } else if (number === 6) {
    return true;
  } else if (number === 7) {
    return false;
  } else if (number === 8) {
    return true;
  } else if (number === 9) {
    return false;
  } else if (number === 10) {
    return true;
  } else {
    return "Number is not between 1 and 10.";
  }
}
 
// Example usage:
console.log(isEven(3)); // Should return false
console.log(isEven(4)); // Should return true
console.log(isEven(11)); // Should return "Number is not between 1 and 10."
Im a caption