How to re-parse token to markdown?

[icefery]

Question

How to re-parse token to markdown?

I am using marked.lexer() to parse markdown to token, and want to do some changes on it and then re-parse to markdown. As below:

const { marked } = require('marked')

const data = `
# Title
content
`
// parse markdown to token
const tokens = marked.lexer(data)
// get h1 token
const h1 = tokens.find(token => token.type === 'heading' && token.depth === 1)
if (h1) {
  // change h1 token
  h1.text = 'Overview'
  // re-parse token to markdown
  // const result = marked.reParse(tokens)
}

// result should be like this
/*
# Overview
content
*/

Thanks.

[UziTech]

That isn't what marked is for. You could use turndown on the output HTML. Or you will have to create your own renderer that outputs markdown instead of html.

[spenserblack]

An extension would probably work.

Here's a simple example:

const heading = {
  name: 'heading',
  renderer({ depth }) {
    // return false to use default renderer
    return depth === 1 ? '<h1>Overview</h1>' : false;
  },
};

marked.use({ extensions: [heading] });
marked.parse(`# header 1
## header 2`); // <h1>Overview</h1><h2 id="header-2">header 2</h2>