javascript小练手

1、做一个小图标在界面中通过按钮可以变大变小变色变圆

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>改变图片</title>
    <style>
        .box{//设置显示的盒子的属性
            width:100px;
            height:100px;
            background-color: red;
        }
        button{//设置你的按钮的属性
            width:20px;
            height:20px;
            font-size: 5px;
            /*background-color: green;*/
        }
    </style>
</head>
<body>
<button type="button" id="big">变大</button>
<button type="button" id="small">变小</button>
<button type="button" id="changeColor">变色</button>
<button type="button" id="circle">变圆</button>

<div class="box" id="hezi"></div>
<script type="text/javascript">
    window.onload = function(){
        function $(id){  //把获取id封装成一个函数
            return document.getElementById(id);
        }
        $('big').onclick = function(){//id为big的那个按钮对盒子进行操作
            $('hezi').style.width = '300px';
            $('hezi').style.height = '400px';
        }
        $('small').onclick = function(){
            $('hezi').style.width = '50px';
            $('hezi').style.height = '50px';
        }
        $('changeColor').onclick = function(){
            // $('hezi').style.color = 'yellow';  //错误的写法 你上面定义的是background这也应该是background
            $('hezi').style.backgroundColor = 'yellow';
        }
        $('circle').onclick = function(){
            $('hezi').style.borderRadius = '50%'; //变圆就是设置成50%
        }
    }
</script>
</body>
</html>

改变一个界面中的盒子大小颜色

2、当你的鼠标移动到一个图片上的时候会替换成另外一个图片当移走的时候又会变成另外一个

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>替换界面图片</title>
</head>
<body>
    <div class="box">
        <img src="./2_01.png" alt="照相机" id="ca" title="哈哈哈">

    </div>
    <script>
        window.onload = function(){
            var oImg = document.getElementById('ca');
            oImg.onmouseover = function(){
                oImg.src = './2_02.png';
                var myDate = new Date();
                // console.log(myDate.toLocaleString());
                // oImg.title = myDate.toLocaleString();
                console.log(myDate.toLocaleString());
                oImg.title = myDate.toLocaleString();
            }
            oImg.onmouseout = function(){
                oImg.src = './2_01.png';
            }

        }
    </script>

</body>
</html>

变换图片

猜你喜欢