使用index`
<body> <div id="main"> <input type="checkbox" class="check-box"> <input type="checkbox" class="check-box"> <input type="checkbox" class="check-box"> <input type="checkbox" class="check-box"> <input type="checkbox" class="check-box"> </div> </body> <script> window.onload = function(){ var inputs = document.getElementsByClassName("check-box"); for(let i=0;i<inputs.length;i++){ inputs[i].setAttribute("index",i); inputs[i].onclick = function(){ console.log("第"+this.getAttribute("index")+"个"); } } } </script>
