VUE-练习

作业一：有红黄蓝三个按钮，以及一个200*200矩形box，点击不同按钮，box的颜色会被切换为指定的颜色

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<div id="app">

    <div :style="div_style"></div>
    <div>
        <button v-on:click="changeColor('red')">{{ red }}</button>
        <button v-on:click="changeColor('yellow')">{{ yellow }}</button>
        <button v-on:click="changeColor('blue')">{{ blue }}</button>
    </div>
</div>

</body>
<script src="Vue/vue.js"></script>
<script>
    var app = new Vue({
        el: '#app',
        data: {
            div_style: {
                width: "200px",
                height: "200px",
                backgroundColor: "black"
            },
            red: '点击变红',
            yellow: '点击变黄',
            blue: '点击变蓝',
        },
        methods: {
            changeColor(c) {
                this.div_style.backgroundColor = c;
            }
        }
    })
</script>
</html>

作业二：有一个200*200的矩形wrap框，点击wrap本身，记录点击次数，如果是1次wrap为pink色，2次wrap为green，3次warp为cyan色，4次重新回到pink色，一次类推。

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title>    <style>        .wrap{            width: 200px;            height: 200px;            color: white;            font: bold 50px/200px 'STSong';            text-align: center;            user-select: none;        }    </style></head><body><div id="app">    <div class="wrap" @click="actionFn" :style="{backgroundColor:bgColor}">{{content}}</div></div></body><script src="js/vue.js"></script><script>    new Vue({        el:'#app',        data:{            content:0,            bgColor:'black',            colorArr:['cyan','pink','green'],        },        methods:{            actionFn(){                this.content ++;                this.bgColor=this.colorArr[this.content % 3]            }        }    })

</script>

</html>

作业三：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .wrap {
            border: 3px solid black;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            overflow: hidden;
            margin: 50px auto 0;
            position: relative;
        }

        .red, .green {
            width: 100px;
            height: 200px;
            position: absolute;
        }

        .red {
            background-color: red;
        }

        .green {
            background-color: green;
        }

        .l {
            width: 100px;
            height: 200px;
            left: 0;
        }

        .t {
            width: 200px;
            height: 100px;
            top: 0;
        }

        .r {
            width: 100px;
            height: 200px;
            right: 0;
        }

        .b {
            width: 200px;
            height: 100px;
            bottom: 0;
        }
    </style>
</head>
<body>
<div id="app">
    <div class="wrap" @click="actionFn">
        <div class="red" :class="red_class"></div>
        <div class="green" :class="green_class"></div>
        <div></div>
    </div>
</div>
</body>
<script src="js/vue.js"></script>
<script>
    new Vue({
        el: '#app',
        data: {
            count: 0,
            red_class: 'l',
            green_class: 'r',
            red_attr: ['l', 't', 'r', 'b'],
            green_attr: ['r', 'b', 'l', 't'],
        },
        methods: {
            actionFn() {
                this.count ++;
                this.red_class = this.red_attr[this.count % 4];
                this.green_class = this.green_attr[this.count % 4];
            }
        }
    })

</script>
</html>

第三题的第二问：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<div id="app">
    <form action="" style="margin: 20px;">
        <p @click="tag" :style="{width: w,height: h, background: bgc, borderRadius:rad}"></p>
    </form>
</div>

</body>
<script src="Vue/vue.js"></script>
<script>
    let num = 0;
    let app = new Vue({
        el:'#app',
        data:{
            h: '200px',
            w: '200px',
            bgc: 'linear-gradient(to top, red 50%, green 50%)',  //实现页面的过度（颜色）
            rad: '50%'
            },
        methods:{
            tag () {
                num += 1;
                if (num==1){
                    this.bgc = 'linear-gradient(to top, red 50%, green 50%)' // 控制方向
                }else {if (num==2){
                    this.bgc = 'linear-gradient(to left, red 50%, green 50%)'
                }else {if (num==3) {
                    this.bgc = 'linear-gradient(to bottom,red  50%, green 50%)'
                }else {
                    this.bgc = 'linear-gradient(to right, red 50%, green 50%)';
                    num = 0
                }
                }}
            }
        }
    });
    function funcTest(){
    window.setInterval(app.tag,500);  // 按照指定的周期（以毫秒计）来调用函数
}
    window.onload = funcTest;  // 页面加载完直接调用 该方法
</script>
</html>