老师，请问怎样让绿色背景字体发生改变的时候蓝色不跟着改变？

来源：1-19 自由编程

藤六

2020-01-19 15:40:33

<!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;
	cursor:pointer;
}

.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-3.4.1.js"></script>
	<script type="text/javascript">
		alert("欢迎来到设置颜色的页面");
		$("#blue").click(function(){

			$(".div2").css("background-color","blue");
			
			$(".div2").text("蓝色背景");

		});
		$("div[id='green']").click(function(){
			$("#bg").css("background-color","green");
			$(".div2").text("绿色背景");
			$(".div2").css({"font-weight":"bold","font-style":"italic"});
		});
		
		$("input[type='text']").keypress(function(ecent){
			if(event.keyCode==66){

				$(".div2").text(" ");

				$(".div2").css("background-color","blue");

			}

			if(event.keyCode==71){

				$(".div2").html("");

				$(".div2").css("background-color","green");

			}
		});
	</script>
</body>
</html>

写回答

1回答