vue 中使用highlight.js 高亮代码块，代码实时高亮

npm install highlight.js

// Vue-cli生成的工程文件的src/main.js
import hljs from 'highlight.js'
import 'highlight.js/styles/googlecode.css' //样式文件
Vue.directive('highlight',function (el) {
let blocks = el.querySelectorAll('pre code');
blocks.forEach((block)=>{
hljs.highlightBlock(block)
})
})

<pre  v-highlight>
<code v-html="code">
</code>
</pre>

// highlight.js
import Vue from 'vue'
import Hljs from 'highlight.js'
import 'highlight.js/styles/googlecode.css'
let Highlight = {}
Highlight.install = function (Vue, options) {
Vue.directive('highlight', function (el) {
let blocks = el.querySelectorAll('pre code');
blocks.forEach((block) => {
Hljs.highlightBlock(block)
})
})
}
export default Highlight

import Highlight from 'path/to/Highlight.js'
Vue.use(Highlight)