Html2md update Guide

Xu Xiaoxi 2021-06-19 06:43:00
html2md html md update guide

Background introduction

html2md By helloworld Developer community Open source is a lightweight and powerful html turn md Tools , Pure front end development , No need for back-end interfaces ( NodeJS Empower ), Support for multiple platforms , One click to convert the article link to md, It is convenient for you to collect and save articles . The interface is as follows :

Technical realization

1. Technology stack

  • vue One of the top three swordsmen , Least claim , Progressive framework with high flexibility
  • nuxt By using Vue.js and Node.js Best practices to build high-performance applications
  • express be based on Node.js platform , Fast 、 to open up 、 minimalist Web Development framework
  • element-ui Universe first Vue Third party component library , I'm not satisfied ?
  • js-dom One can be found in Node Simulation of the browser environment API The library of
  • turndown Use JavaScript take HTML Convert to Markdown
  • axios Easy to use 、 Simple and efficient http library , Support for browsers and Node Environmental Science .
  • mavon-editor Based on a Vue Of markdown Editor , Support what you see is what you get
  • sass Powerful Css One of the preprocessors

2. Tool Architecture

3. Workflow

Update content and technology implementation

Markdown File saving and downloading

html2md Open source has been around for a while , And in Helloworld The developer community is free for everyone to use , Of course, word of mouth is relatively good , Continue refueling , Strive to make more simple and easy-to-use tools for you ~

not long ago , Many fans have an interesting demand : Converted md Whether the content can be saved as a local file , In response to the enthusiastic support of fans , The answer, of course, is Yes!

Talk is cheap. Show me the code!

The technical idea is probably soy sauce purple :

  • front end : Convert the current md Content passes through the interface to the back end interface ️ The interface returns a download address ️ Create a dynamic a Tag to pull up the browser's download task ️ That's the end of the download

Request download interface

toDownload () {
  const params = {,
  this.$`${window.location.origin}/getMdFile`, params)
    .then((res) => {

Create download task

downLoadFile (url) {
  const a = document.createElement('a') = `${}.md`
  a.href = url
  • Back end : The back-end interface here is of course our front-end interface node La !
    • because md The string is long , There's no brain choice here post Mode to receive parameters
    • Because of the adoption of post, Additional introduction required body-parser To parse the input parameters
    • It involves reading and writing directories and files (IO), Need to quote fs modular
  • The process is like this : Receive input parameters ️ Determine whether the currently downloaded directory exists ️ If it doesn't exist, create a new one download Catalog ️ If the directory exists, write it directly to md file ️ And return the currently created file path to the front end ️ This way, the back-end work is over

body-parser To configure

//  Used to resolve json Format 
app.use(bodyParser.json({ limit'50mb' }))
//  Used to resolve body Medium  urlencoded  character
app.use(bodyParser.urlencoded({ limit'50mb'extendedtrue }))

receive post Enter the reference'/getMdFile'function (req, res, next{
  // post  The participation is in  body  Inside , Here we set the default value
  const qMd = || '##  empty '
  const qUrl = req.body.url || ''
  // ...

Configure download directory name

const folderName = 'download'
const downLoadPath = path.join('./static', folderName)

Determine whether the download directory exists

//  Determine whether the directory exists , If it exists, write it to the file directly 
const isExist = fs.existsSync(downLoadPath)
if (isExist) {
  //  Folder exists

//  Folder does not exist , Create a ( It's all synchronous operations )

Return the written file path to

//  write in md file 
function writeFile ({
  //  Here we take the time stamp as the file name
  const mdName = `${}.md`
  try {
    //  Synchronous write , And back to the front end
    fs.writeFileSync(`${downLoadPath}/${mdName}`, qMd)
  } catch (error) {
      msg' The program is abnormal ~'
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