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Detailed explanation of the use of JS onchange event in drop-down box

藏色散人forward: 2022-08-07 11:14:102652browse

This article will introduce to you the use of js onchange event in the drop-down box. It has certain reference value. Interested friends can refer to it.

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript" src="js/jquery-1.4.js" ></script>
	</head>
	<body>
		
    <!--onchange 事件会在域的内容改变时发生。
        onchange 事件也可用于单选框与复选框，下拉框改变后触发的事件。-->
		<select id="sxbh" onchange="xzsx();">
		   <option value="1">下拉1</option>
		   <option value="2">下拉2</option>
		   <option value="3">下拉3</option>
	    </select>
		  
		<script>
			function xzsx(){
				console.log("xzsx函数被调用了");
				var sxbh = document.getElementById("sxbh").value;
				console.log(sxbh)
				
				//我们拿到sxbh值后，可以做其他；逻辑处理，或者带上参数发送ajax
//			    jQuery.ajax({
//				url: "/", 
//				async: false,
//				type: "POST",
//				data: {SXBH:sxbh},
//				success: function(data){
//					xzsxList = JSON.parse(data);
//					leftList = JSON.parse(data);
//				}
//			});
		};
			
		</script>
	</body>
</html>

Detailed explanation of the use of JS onchange event in drop-down box
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