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Let the code in Markdown run in real time, why is there such a need?

In our front-end team, technical-related documents are written in Markdown. There are often a lot of sample code in the documentation. We hope that when you read the documentation, you can run the sample code to see the rendering interface.

• Let the code in Markdown run and preview.
• The code can be edited online.
• Does not affect the layout of the entire document stream.
• Support React, support code highlighting.
• Babel can be configured.

After understanding the requirements, I wrote a React component to satisfy these functions, react-code-view , first look at the preview:

Preview: https://simonguo.github.io/react-code-view/

• Parse the Markdown document with markdown-loader and html-loader.
• Take the code out of the regular expression and give it to codemirror
• Compile the code in codemirror through babel and render it to the specified container via ReactDOM.render .

npm install react-code-view

Support for markdown-loader needs to be added in webpack. Need to install:

npm install html-loader --save-dev
npm install [email protected] --save-dev
npm install [email protected] --save-dev

webpack.config.js

const markdownRenderer = require('react-markdown-reader').renderer;

...
{
  test: /\.md$/,
  use: [{
    loader: 'html-loader'
  }, {
    loader: 'markdown-loader',
    options: {
      renderer: markdownRenderer(/**languages:Array<string>**/)
    }
  }]
}

languages 默认值：["javascript", "bash", "xml", "css", "markdown", "less"];

The sample code usually uses ES2015+, React, etc., and needs to compile the code in real time, so introduce Babel in HTML:

<script
  type="text/javascript"
  src="//cdn.staticfile.org/babel-standalone/6.24.0/babel.min.js"
></script>

If cdn.staticfile.org is not well accessed in your area, you can change other CDN.

import CodeView from 'react-code-view';
import 'react-code-view/lib/less/index.less';

import { Button } from 'rsuite';

<CodeView dependencies={{ Button }}>{require('./example.md')}</CodeView>;

The source code is uniformly written in markdown, reference: example.md

The important thing to note here is that the code that needs to be run must be placed in <!--start-code--> and <!--end-code--> between.

• React Suite