npm i markdown-it
npm i markdown-it-meta-header
const MarkdownIt = require("markdown-it")
const MarkdownItMetaHeader = require("markdown-it-meta-header")
const md = new MarkdownIt()
md.use(MarkdownItMetaHeader)
md.render("---\n1: 2\n3: [4, 5, 6]\n---")
MIT
Kotakato