Javascript
添加事件的方式有很多,本文主要列举三种添加事件的方式,包括添加到元素事件属性上、添加到Javascript
脚本中、事件监听器。
1.添加到元素事件属性上
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>php.cn</title> </head> <body> <button onclick="alert('我被调用了')">按钮1</button> </body> </html>
2.添加到JS脚本中
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>php.cn</title> </head> <body> <button onclick="">按钮2</button> <script> const btn2=document.querySelector("button"); btn2.onclick=function(){ alert("你好"); } </script> </body> </html>
3.事件监听器
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>php.cn</title> </head> <body> <button onclick="">按钮3</button> <script> const btn3=document.querySelector("button"); btn3.addEventListener("click",function(){ alert("被调用了"); }); </script> </body> </html>
推荐:《2021年js面试题及答案(大汇总)》
以上是Javascript添加事件的三种方式的详细内容。更多信息请关注PHP中文网其他相关文章!