howToUseMarkdownIt.js

let md = new require("markdown-it")()

let result = md.parseInline( 
	`# markdown-it rulezz! 
	
[mijo](http://link)

	> soy una cita

	[link2](http://link2.com)
	`
, "utf8")

console.log(result)
console.log(result[0].children)
result[0].children.filter(ch=>(ch.tag==="a"&&ch.attrs)).map(c=>console.log(c.attrs[0][1]))

working.js

let md = new require("markdown-it")()
let fs = require('fs')

let string = fs.readFileSync('./readme.md', "utf8")
let result = md.parseInline(string)
let links = result[0].children.filter(ch => (ch.tag === "a" && ch.attrs)).map(c => c.attrs[0][1])
console.log(links)