前端实现搜索关键字高亮功能:

/* 
    联想建议
 */
<template>
    <div class="searchSuggestionMain">
        <van-cell v-for="(item, index) in suggestionsList" :key="index" icon="search" clickable>
            <div slot="title" v-html="heightlight(item.content)"></div>
        </van-cell>

        <!-- {{}}绑定=>纯文本Hello <span style="color:red">World</span> -->
        <div>{{ htmlStr }}</div>

        <!-- v-html指令 -->
        <div v-html="htmlStr"></div>
    </div>
</template>

<script>

export default {
    name: 'SearchSuggestion',
    props: {
        searchText: {
            type: String,
            required: true
        }
    },
    data() {
        return {
            suggestionsList: [],
            htmlStr: 'Hello World'
        }
    },
    methods: {
        // 高亮函数
        heightlight(text) {
            // 动态变量创建正则
            /* 
                RegExp正则构造函数
                    参数一:匹配模式字符串
                    参数二:匹配模式,gi全局忽略大小写
            */
            const reg = new RegExp(this.searchText, 'gi')
            return text.replace(reg, `<span class="active">${this.searchText}</span>`)
        },
    }
}
</script>

<style scoped lang="less">
    /deep/ span.active {
        color: #3296fa !important;
    }
</style>
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