46 lines
994 B
HTML
46 lines
994 B
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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</head>
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<body>
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<script type="text/javascript">
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// 浏览器顶级对象==>window
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// 页面顶级对象==>Document
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// 变量是属于 window 的，在内存中 ，存储
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// 堆==>引用类型
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// 栈==>值类型
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var str = 'hello'
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console.log(str)
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console.log(window.str)
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function f1(){
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console.log('hello word')
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}
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f1()
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window.f1()
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//注意
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var name = "战三"
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console.log(name)
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console.log(window.name)
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var number
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console.log(number)//变量声明未赋值==>返回undefined
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console.log(window.number)
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console.log(top)
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console.log(window)
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// top===>>window
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window.alert(111)
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//window.的东西都可以省略window
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var res = window.confirm('确定退出么?')
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console.log(res)//===>返回值true false
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var res = window.prompt('请输入密码',8888)
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console.log(res)//返回输入的内容，，返回值字符串
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</script>
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</body>
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</html> |