Simple node script to generate random GitHub flavored valid markdown

generate.js

const globby = require("globby");
const fs = require("fs-extra");
const path = require("path");
const fetch = require("node-fetch");

function randomName(length) {
  let result = "";
  const characters =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
  const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  return result;
}

async function randomMarkdown() {
  const url = "https://jaspervdj.be/lorem-markdownum/markdown.txt";
  try {
    const response = await fetch(url);
    const text = await response.text();
    return text;
  } catch (error) {
    console.log(error);
  }
}

async function insertContent(target) {
  const docsDir = path.resolve(target || 'docs');
  const docsFiles = await globby(["**"], {
    cwd: docsDir
  });
  await Promise.all(
    docsFiles.map(async source => {
      const fromPath = path.resolve(docsDir, source);
      const content = await randomMarkdown();
      await fs.writeFile(fromPath, content);
    })
  );
}

async function createManyFile(length = 20, target) {
  const docsDir = path.resolve(target || 'docs')
  for (let i = 0; i < length; i++) {
    const toPath = path.resolve(docsDir, `${randomName(10)}.md`)
    await fs.writeFile(toPath, `${Math.random()}`);
  }
}

async function rename(target) {
  const docsDir = path.resolve(target || 'docs');
  const docsFiles = await globby(["**"], {
    cwd: docsDir
  });
  await Promise.all(
    docsFiles.map(async source => {
      const fromPath = path.resolve(docsDir, source);
      const toPath = path.resolve(docsDir, `${randomName(10)}.md`);
      await fs.rename(fromPath, toPath);
    })
  );
}

async function execute() {
  await createManyFile(100);
  await insertContent();
}

execute();

Result: