<!DOCTYPE html> <html> <head lang="zh-CN"> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title></title> <style> .button { 200px; height: 200px; background-color: antiquewhite; margin: 20px; text-align: center; line-height: 200px; } </style> </head> <body> <div class="button">Button</div> <script> "use strict"; var btn = document.querySelector('.button'); btn.addEventListener('click', function (event) { console.log('OH~!You clicked me~!'); }, false); var ev = new MouseEvent('click', { cancelable: true, bubble: true, view: window }); btn.dispatchEvent(ev); </script> </body> </html>