Vue3-属性绑定、定时任务

news2025/10/31 17:43:52

1.Vue3-属性绑定

2.定时任务

1.Vue3-属性绑定

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!-- vue.js -->
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
    <style>
        .dvcolor {
            color: red;
        }
        .dvgreen{
            color: green;
        }
    </style>
</head>
<body>
<div id="app">
    <!-- 3.属性-绑定 :属性名 -->
    <div :class="dvcls" @click="change">
        <h1>你的心情</h1>
    </div>
</div>
</body>
<script>
    // 引入
    const {createApp, ref} = Vue
    // 创建
    createApp({

        //setup 标记 Vue3 支持Vue3的语法 直接定义变量、函数都可以
        setup() {
            const dvcls = ref("dvcolor")

            const change = () => {
                console.log(dvcls.value)
                if (dvcls.value == "dvcolor") {
                    dvcls.value = "dvgreen"
                } else {
                    dvcls.value = "dvcolor"
                }
            }

            return {//只有返回的上面才可以使用
                dvcls,change
            }
        }
    }).mount('#app')
</script>
</html>

在这里插入图片描述

2.定时任务

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!-- vue.js -->
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
    <style>
        .dvcolor {
            color: red;
        }

        .dvgreen {
            color: green;
        }
    </style>
</head>
<body>
<div id="app">
    <!-- 3.属性-绑定 :属性名 -->
    <div :class="dvcls" @click="change">
        <h1>你的心情</h1>
    </div>
</div>
</body>
<script>
    // 引入
    const {createApp, ref} = Vue
    // 创建
    createApp({

        //setup 标记 Vue3 支持Vue3的语法 直接定义变量、函数都可以
        setup() {
            const dvcls = ref("dvcolor")

            var t;
            const change = () => {
                console.log(dvcls.value)
                if (t != null) {
                    //js 关闭定时任务
                    clearInterval(t)
                } else {
                    //js 开启定时任务
                    t = setInterval(() => {
                        if (dvcls.value == "dvcolor") {
                            dvcls.value = "dvgreen"
                        } else {
                            dvcls.value = "dvcolor"
                        }
                    }, 1000)
                }

                if (dvcls.value == "dvcolor") {
                    dvcls.value = "dvgreen"
                } else {
                    dvcls.value = "dvcolor"
                }
            }

            return {//只有返回的上面才可以使用
                dvcls, change
            }
        }
    }).mount('#app')
</script>
</html>