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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <a href="https://www.runoob.com/js/js-window.html">BOM文档</a>
- HTML DOM 的 document 也是 window 对象的属性之一
- <script>
- // window.alert("hello");
- // window.prompt("hello");
- var a = 10;
- // 定义了一个全局变量 b
- window.b = 20;
- console.log(a+b)
- console.log(window.a);
- </script>
- </body>
- </html>
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