dialog是html5.2的规范，浏览器兼容性比较差，常用的特性就这些，具体可以看看这里
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>document</title> <style> dialog { border-color: red; } dialog::backdrop { background: rgba(0, 0, 0, 0.3); } </style></head><body> <button id="btn">TEST</button> <dialog id="dialog">12 <button id="close">close</button> </dialog> <script> var dialogEl = document.querySelector('#dialog'); var btnEl = document.querySelector('#btn'); var closeEl = document.querySelector('#close'); btnEl.addEventListener('click', e => { // dialogEl.show(); // 打开dialog dialogEl.showModal(); // 打开dialog，有蒙版 }); closeEl.addEventListener('click', e => { dialogEl.close('testValue'); console.log(dialogEl.returnValue) // 'testValue' }); dialogEl.addEventListener('close', e => { console.log('close event') }); dialogEl.addEventListener('cancel', e => { // 按下ESC同时也会触发close事件 console.log('enter ESC key event') // 以下可选代码 dialogEl.close('testValue2'); // console.log(e.target.returnValue); // 'testValue2' }); </script></body></html>
