highlight.js 实现搜索关键词高亮效果-编程知识

highlight.js 实现搜索关键词高亮效果

先看效果：
在这里插入图片描述
折腾了老半天，记录一下
注意事项都写注释了
代码：

<template><div class="absolute-lt wh-full overflow-hidden p-10"><div style="width: 200px"><el-input v-model="keyword" @input="search"></el-input></div><code><pre v-html="html"></pre></code></div>
</template>
<script setup>
import { onMounted, computed, reactive, ref } from "vue";
import hljs from "highlight.js";
// 这不引入样式防止干扰高亮显示
// import "highlight.js/styles/arta.css";
const str = `
Server: cloudflare
Date: Tue, 02 Jan 2024 15:40:15 GMT
Content-Type: text/html
Content-Length:  553
Connection: keep
CF-RAY: 83f419748811fa1a-SJC<html>
<head><title>403 Forbidden</title></head>
<body>
<center><h1>403 Forbidden</h1></center>
<hr><center>cloudflare</center>
</body>
</html>
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->`;
const html = ref("");
const keyword = ref("");
let saveValue = ref("");// 注册自定义语言，防止生成多余标签匹配
hljs.registerLanguage("custom", function () {return {};
});
html.value = saveValue.value = hljs.highlight(str, { language: "custom" }).value;function search() {if (!keyword.value) return (html.value = saveValue.value);let reg = new RegExp(keyword.value, "g", "i");html.value = saveValue.value.replace(reg,"<span class='abc'> " + keyword.value + " </span>");
}
</script><style lang="less">
span.abc {color: red;
}
</style>