Add source map to the output HTML of markdown-it.
npm install markdown-it-source-mapAdd source map to the output HTML of markdown-it.
```
yarn add markdown-it-source-map
`JavaScript
import markdownIt from 'markdown-it'
import markdownItSourceMap from 'markdown-it-source-map'
const mdi = markdownIt()
mdi.use(markdownItSourceMap)
mdi.render('# hello world') //
develop
`
yarn build
yarn test
``