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# Code
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## Prequisites
< n-alert title = "Note" type = "warning" >
Due to package size, Naive UI doesn't include highlight.js. If you want use Code, make sure you have set highlightjs before using it.
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< / n-alert >
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The following code shows how to set hljs of Naive UI. Importing highlight.js on demand is recommonded, because it can significantly reduce bundle size of your app.
```js
import Vue from 'vue'
import NaiveUI from 'naive-ui'
import hljs from 'highlight.js/lib/highlight'
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import cpp from 'highlight.js/lib/languages/cpp'
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hljs.registerLanguage('cpp', cpp)
Vue.use(NaiveUI)
NaiveUI.setHljs(hljs)
```
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## Demos
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```demo
basic
```
