label包裹着input,给label加点击事件会响应两次
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <label for="innerIpt1"> <input id="innerIpt1" type="checkbox"/>label1 </label> <input id="innerIpt2" type="checkbox"/> <label for="innerIpt2" id="label2">label2 </label> <script> var label1 = document.querySelector("label"); var label2 = document.querySelector("#label2"); var input1 = document.querySelector("#innerIpt1"); var input2 = document.querySelector("#innerIpt2"); label1.addEventListener("click", function() { console.log("label1"); }, false); input1.addEventListener("click", function(e) { // e.stopPropagation() console.log("input1"); }, false); label2.addEventListener("click", function() { console.log("label2"); }, false); input2.addEventListener("click", function(e) { e.stopPropagation() console.log("input2"); }, false); </script> </body> </html>
点击label1的时候,console输出:
label1
input1
lable1
代码贴出来看看,
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