编程练习

来源：1-19 自由编程

一娆Hacker

2021-05-07 18:51:10

<!DOCTYPE html >

<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>jQuery练习</title>

    <style type="text/css">
        .div1{

            float: left;
            width: 50px;
            line-height: 30px;
            background-color: lightgray;
            margin-left: 10px;
            text-align: center;
            vertical-align: middle;
        }
        .div2{
            width: 300px;
            height: 300px;
            border: solid gray 1px;
            margin-top: 60px;
            color: red;
        }
    </style>


</head>
<body>
<h2>请选择背景颜色</h2>
<div>
    <div id="blue" class="div1">蓝色</div>
    <div id="green" class="div1">绿色</div>
</div>
<div class="div2" id="bg">
</div>
<div>输入颜色首字母： <input type="text" name="color"></div>
<script type="text/javascript" src="js/jquery-3.6.0.min.js" ></script>
<script type="text/javascript">
    alert("欢迎来到设置颜色界面");
    $("div[id='blue']").click(function (){
        $("div[id='bg']").css("font-style","normal");
        $("div[id='bg']").css("font-weight","normal");
        $("div[id='bg']").css("background-color","blue");
        $("div[id='bg']").css("color","red");
        $("div[id='bg']").text("蓝色背景");
    })
    $("div[id='green']").click(function (){
        $("div[id='bg']").css("background-color","green");
        $("div[id='bg']").css({"color":"red","font-weight":"bold","font-style":"italic"});
        $("div[id='bg']").text("绿色背景");
    })
    $("input[name='color']").keypress(function (event){
        if(event.keyCode==66){
            $("div[id='bg']").css("background-color","blue");
            $("div[id='bg']").text("");
        }
    })
    $("input[name='color']").keypress(function (event){
        if(event.keyCode==71){
            $("div[id='bg']").css("background-color","green");
            $("div[id='bg']").text("");
        }
    })
</script>
</body>
</html>