Token Manipulation Guide

import { marked } from "marked";

marked.use({
  walkTokens(token) {
    if (token.type === 'heading') {
      // Add custom ID to headings
      token.id = token.text.toLowerCase().replace(/[^\w]+/g, '-');
    }
  },
  renderer: {
    heading({ tokens, depth, id }) {
      const text = this.parser.parseInline(tokens);
      return `<h${depth} id="${id}">${text}</h${depth}>\n`;
    }
  }
});

import { marked } from "marked";

// Tokenize
const tokens = marked.lexer('# Hello\n\nThis is **markdown**.');

// Modify tokens
tokens.forEach(token => {
  if (token.type === 'heading') {
    token.depth += 1; // Demote all headings
  }
});

// Parse modified tokens
const html = marked.parser(tokens);