Vue单页面应用中实现Markdown渲染

// vue.config.js
module.exports = {
 runtimeCompiler: true
}

npm install markdown-it --save # 本体
npm install markdown-it-highlightjs --save # 代码高亮
npm install markdown-it-katex --save # latex 支持

<link rel="stylesheet" href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.5.0/build/styles/default.min.css" rel="external nofollow" >
<script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.5.0/build/highlight.min.js"></script>

npm install github-markdown-css --save

import 'github-markdown-css/github-markdown.css'

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css" rel="external nofollow" >

<template>
 <components :is="html" class="markdown-body"></components>
</template>

<script>
import MarkdownIt from 'markdown-it'
import hljs from 'markdown-it-highlightjs'
import latex from 'markdown-it-katex'
export default {
 name: 'Markdown',
 props: {
  content: String
 },
 data: () => ({
  md: null
 }),
 computed: {
  // 使用 computed 才能在动态绑定时动态更新
  html: function () {
   let res = this.md.render(this.content)
   // 使用正则表达式将站内链接替换为 router-link 标签
   res = res.replace(/<a href="(?!http://|https://)(.*?)" rel="external nofollow" >(.*?)</a>/g, '<router-link to="$1">$2</router-link>')
   // 使用正则表达式将站外链接在新窗口中打开
   res = res.replace(/<a href="(.*?)" rel="external nofollow" >(.*?)</a>/g, '<a href="$1" rel="external nofollow" target="_blank">$2</a>')
   return {
    template: '<div>' + res + '</div>'
   }
  }
 },
 created () {
  this.md = new MarkdownIt()
  this.md.use(hljs).use(latex)
 }
}
</script>

<template>
  <div>
    <Markdown :content="content"/>
  </div>
</template>

<script>
import Markdown from '@/components/Markdown.vue'
export default {
 name: 'Home',
 components: {
  Markdown
 },
 data: () => ({
  content: ''
 }),
 created () {
  this.content = '# 测试'
 }
}
</script>