图框变色 实现

作业一:

1、有红、黄、蓝三个按钮,以及一个200*200的矩形框,点击各色按钮可使矩形框变成对应的颜色

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box{
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
    <div id="d1">
        <div>
            <button @click="changeColor('red')">红</button>
            <button @click="changeColor('yellow')">黄</button>
            <button @click="changeColor('blue')">蓝</button>
        </div>
        <div class="box" :style="{backgroundColor: bgColor}"></div>
    </div>
</body>
<script src="js/vue.js"></script>
<script>
    new Vue({
        el:'#d1',
        data:{
            bgColor:'black'
        },
        methods:{
            changeColor(color){
                this.bgColor=color;
            }
        }
    })
</script>

</html>

2、有一个200*200的矩形框,点击框本身,记录点击次数,并使框的颜色根据点击次数变化,1次为红色,2为黄色,3为绿色,4为红色,5为黄色,依次循环

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .wrap{
            width: 200px;
            height: 200px;
            /*background-color: black;*/
            color: white;
            font: bold 50px/200px 'STSong';
            user-select: none;
            text-align: center;
            cursor: pointer;
        }
    </style>
</head>
<body>
    <div id="d1">
        <p class="wrap" @click="actionFn" :style="{backgroundColor:bgColor}">{{ count }}</p>
    </div>

</body>
<script src="js/vue.js"></script>
<script>
    new Vue({
        el:'#d1',
        data:{
            count:0,
            bgColor:'black',
            colorArr:['pink','red','green']
        },
        methods:{
            actionFn(){
                this.count ++;
                this.bgColor = this.colorArr[this.count % 3]
            }
        }
    })
</script>

</html>

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转载自www.cnblogs.com/allenchen168/p/12054163.html