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Code Block

Adding code blocks to your docs

import createMDX from 'fumadocs-mdx/config';

const withMDX = createMDX();

// [!code word:config]
/** @type {import('next').NextConfig} */
const config = {
  // [!code highlight]
  reactStrictMode: true, // [!code highlight]
}; // [!code highlight]

export default withMDX(config);

Display code blocks, added by default.

  • Copy button
  • Custom titles and icons

Usage

Wrap the pre element in <CodeBlock />, which acts as the wrapper of code block.

import { Pre, CodeBlock } from 'fumadocs-ui/components/codeblock';

<MDX
  components={{
    // HTML `ref` attribute conflicts with `forwardRef`
    pre: ({ ref: _ref, ...props }) => (
      <CodeBlock {...props}>
        <Pre>{props.children}</Pre> {/* [!code highlight] */}
      </CodeBlock>
    ),
  }}
/>;

See Markdown for usages.

Keep Background

Use the background color generated by Shiki (the Rehype Code plugin).

import { Pre, CodeBlock } from 'fumadocs-ui/components/codeblock';

<MDX
  components={{
    pre: ({ ref: _ref, ...props }) => (
      <CodeBlock keepBackground {...props}>
        <Pre>{props.children}</Pre>
      </CodeBlock>
    ),
  }}
/>;

Icons

Specify a custom icon by passing an icon prop to CodeBlock component.

By default, the icon will be injected by the custom Shiki transformer.

console.log('js');