一、使用marked

第一步：下载marked和代码块高亮highlight.js

npm i marked
 
npm i highlight.js
 
npm i markdown-loader
 
npm i github-markdown-css

第二步：注册并使用

main.js

import hljs from "highlight.js";
import "github-markdown-css";
import "highlight.js/styles/atom-one-dark.css";
 
Vue.directive("highlight", function (el) {
  let blocks = el.querySelectorAll("pre code");
  blocks.forEach((block) => {
    hljs.highlightBlock(block);
  });
});

页面内使用

1、其中class的markdown-body是必须要带的，marked的样式，同时如果需要修改样式，也可以通过此修改

2、v-highlight全局注册代码块高亮

3、自定义渲染器我是需要改变标题转换，如果你们有需要可以自行处理

<template>
  <div id="Mindopt" class="Mindopt">
    <div v-highlight class="replybox markdown-body" v-html="Mindoptinfo">div>
  div>
template>
 
<script>
// 创建自定义渲染器
class CustomRenderer extends marked.Renderer {
  heading (text, level) {
    // 将一级标题转换为h1标签
    if (level === 1) {
      return `
# ${text}
`;
    } else if (level === 2) {
      return `
## ${text}
`;
    } else if (level === 3) {
      return `
### ${text}
`;
    } else if (level === 4) {
      return `
#### ${text}
`;
    } else if (level === 5) {
      return `
##### ${text}
`;
    } else if (level === 6) {
      return `
###### ${text}
`;
    }
  }
  // text (text) {
  //   console.log(text);
  // }
  // code (code, language, isEscaped) {
  //   console.log(language);
  //   if (language && language === 'math') {
  //     return katex.renderToString(code, { throwOnError: false });
  //   }
  //   return marked.Renderer.prototype.code.call(renderer, code, language, isEscaped);
  // };
}
// 使用自定义渲染器
const renderer = new CustomRenderer();
const markedOptions = {
  renderer: renderer,
  breaks: true,
};
import { marked } from "marked";
import { getoptInfo, getGroupMessage, updataGroup, deleteGroupMessages } from '@/api/Mindopt'
export default {
  name: 'Mindopt',
  data () {
    return {
      Mindoptinfo: '',
    }
  },
  created () {
    this.getoptInfo()
  },
  methods: {
    // 获取信息
    async getoptInfo () {
      const res = await getoptInfo()
      this.Mindoptinfo = res.data
      this.Mindoptinfo = marked(this.Mindoptinfo, markedOptions);
    },
  }
}
script>
 
 
<style lang="scss">
// 回答的格式或者数据回显的格式
.markdown-body {
  // font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB,
  //   Microsoft YaHei, Arial, sans-serif !important;
  // line-height: 20px;
 
  // & ul {
  //   list-style: none;
  //   padding-left: 20px;
  // }
 
  color: #000 !important;
 
  p {
    margin-top: 10px !important;
    margin-bottom: 10px !important;
  }
 
  pre {
    padding: 5px !important;
    margin-bottom: 10px !important;
  }
 
  .hljs {
    color: #abb2bf;
    background: #282c34;
  }
 
  .hClass {
    //出现#则不转换为h1等标签
    font-size: 16px;
    color: #8a2328;
    font-weight: 600;
    margin: 10px 0;
  }
 
  /* 只改变普通 code 标签的颜色，不影响 pre 中的 code */
  code:not(pre) {
    color: red;
    font-weight: 600;
    background-color: rgba(175, 184, 193, 0.3);
    margin: 0 5px;
  }
 
  a {
    color: #1d71f7 !important;
  }
}
style>

二、代码块和块引用添加复制按钮

页面使用

<template>
  <div id="Mindopt" class="Mindopt">
    <div v-highlight class="replybox markdown-body" v-html="Mindoptinfo">div>
  div>
template>
 
<script>
import CodeCopy from './CodeCopy.vue'
export default {
  name: 'Mindopt',
  data () {
    return {
      Mindoptinfo: '',
    }
  },
  updated () {
    this.update()
  },
  methods: {
    //获取对应markdown代码块标签
    update () {
      setTimeout(() => {
        // 代码块添加复制按钮
        document.querySelectorAll('pre').forEach(el => {
          //   console.log(el)
          if (el.classList.contains('code-copy-added')) return
          //   https://cn.vuejs.org/v2/api/index.html#Vue-extend
          /* 使用基础 Vue 构造器，创建一个“子类”。参数是一个包含组件选项的对象 */
          let ComponentClass = Vue.extend(CodeCopy)
          let instance = new ComponentClass()
          instance.code = el.innerText
          instance.parent = el
          /* 手动挂载 */
          instance.$mount()
          el.classList.add('code-copy-added')
          el.appendChild(instance.$el)
        })
        // 块引用添加复制按钮
        document.querySelectorAll('blockquote').forEach(el => {
          //   console.log(el)
          if (el.classList.contains('code-copy-added')) return
          //   https://cn.vuejs.org/v2/api/index.html#Vue-extend
          /* 使用基础 Vue 构造器，创建一个“子类”。参数是一个包含组件选项的对象 */
          let ComponentClass = Vue.extend(CodeCopy)
          let instance = new ComponentClass()
          instance.code = el.innerText
          instance.parent = el
          /* 手动挂载 */
          instance.$mount()
          el.classList.add('code-copy-added')
          el.appendChild(instance.$el)
        })
      }, 100)
    },
  }
}
script>
 
 
<style lang="scss">
// 复制按钮
.codeContent {
  max-width: 400px;
  margin: 0 auto;
  padding-top: 25vh;
}
.code-copy-added {
  background-color: #282c34;
  color: white;
  padding: 25px 20px;
  margin: 10px 0;
  text-align: left;
  border-radius: 3px;
  position: relative;
}
.code-copy-added:hover .copy-btn {
  opacity: 1;
}
style>

CodeCopy.vue

<template>
  <div class="copy-content">
    
    <div
      class="copy-btn code-data-copy"
      @click="copyMessage"
      data-clipboard-action="copy"
      :data-clipboard-text="code"
    >
      复制
    div>
    
  div>
template>
 
<script>
import Clipboard from 'clipboard' //复制插件
export default {
  data () {
    return {
      code: null,
      // success: false
    }
  },
  methods: {
    copyMessage (value) {
      let _this = this
      // _this.success = false
      let clipboard = new Clipboard('.code-data-copy')
      clipboard.on('success', function (e) {
        _this.$message.success('复制成功')
        // _this.success = true
        // setTimeout(() => {
        //   _this.success = false
        // }, 300)
        clipboard.destroy() // 销毁,避免多次点击重复出现
      })
      clipboard.on('error', function () {
        console.log('复制失败')
      })
    }
  }
}
script>
 
<style lang="scss" scoped>
.copy-content {
  height: 0;
  // position: absolute;
  // top: 0;
  // right: 0;
}
 
.icon {
  width: 0.8rem;
  height: 0.8rem;
  fill: white;
}
.copy-btn {
  user-select: none;
  opacity: 0;
  position: absolute;
  right: 5px;
  top: 5px;
  cursor: pointer;
  padding: 5px;
  border-radius: 3px;
  transition: 0.3s;
  // background: rgba(255, 255, 255, 0.2);
  background: #fff;
  &:active {
    // background: rgba(253, 253, 253, 0.575);
    background: rgba(253, 253, 253, 0.575);
  }
}
.copy-success-text {
  color: white;
  position: absolute;
  font-size: 12px;
  top: 8px;
  right: 2.5rem;
  font-weight: 200;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  animation: successCopy 0.5s ease both 1;
}
@keyframes successCopy {
  70% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.5);
  }
}
style>