Event Processing
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>事件处理</title> <style> </style> </head> <body> <div id="div"> <button id="btn">button</button> </div> <script> var btn = document.getElementById("btn"); var div = document.getElementById("div"); btn.addEventListener("click", showType); div.addEventListener("click", showDiv); function showType(event) { alert(event.type); alert(event.target); event.stopPropagation(); } function showDiv() { alert("div") } </script> </body> </html>