Vue输入框模糊搜索的多种写法

（1）模板方案

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <!-- 输入框模糊搜索 -->
    <div id="box">
        <input type="text" v-model="mytext"/>
        <ul>
            <template v-for="item in dataList" :key="item">
                <li v-if="item.includes(mytext)">{{ item }}</li>
            </template>
        </ul>
    </div>
    <script>
        var obj = {
            data(){
                return {
                    mytext:'',
                    dataList:['aaa','abc','acb','add','abb','acc','bca','cca','bba','ccc','bbb'],
                }
            }
        }
        Vue.createApp(obj).mount('#box')
    </script>
</body>
</html>

（2）复制方案 （浪费内存不优雅）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <!-- 输入框模糊搜索 -->
    <div id="box">
        <input type="text" v-model="mytext"/ @input="handleInput">
        <ul>
            <template v-for="item in dataList" :key="item">
                <!-- <li v-if="item.includes(mytext)">{{ item }}</li> -->
                 <li>{{item}}</li>
            </template>
        </ul>
    </div>
    <script>
        var obj = {
            data(){
                return {
                    mytext:'',
                    dataList:['aaa','abc','acb','add','abb','acc','bca','cca','bba','ccc','bbb'],
                    baklist:['aaa','abc','acb','add','abb','acc','bca','cca','bba','ccc','bbb'] // 复制data
                }
            },
            methods:{
                handleInput(){
                  this.dataList = this.baklist.filter(item=>item.includes(this.mytext))
                }
            }
        }
        Vue.createApp(obj).mount('#box')
    </script>
</body>
</html>

（3）函数表达式

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <!-- 输入框模糊搜索 -->
    <div id="box">
        <input type="text" v-model="mytext"/>
        <ul>
            <template v-for="item in test()" :key="item">
                <li>{{ item }}</li>
            </template>
        </ul>
    </div>
    <script>
        var obj = {
            data(){
                return {
                    mytext:'',
                    dataList:['aaa1','abc','acb','add','abb','acc','bca','cca','bba','ccc','bbb','aac','aab'],
                }
            },
            methods:{
                test(){
                    return this.dataList.filter(item=>item.includes(this.mytext))
                }
            }
        }
        Vue.createApp(obj).mount('#box')
    </script>
</body>
</html>

（4）watch监听

（5）计算属性