39.事件监听 · 大杂烩

![](https://box.kancloud.cn/29b253100c44097a8656ce684c9dad47_804x161.png) **JS版本** ``` <body> <button id="btn">点击执行监听</button> <script> var btn = document.getElementById("btn"); btn.addEventListener("click", a); function a() { console.log(1); } </script> </body> ``` **JQuery：** ``` $(function(){ $('div').on('click','p',function(){ $('p').css('color','red'); }); ```