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Webapi (VI) - BOM

2022-04-21 08:21:00 【To continue his unique learning】

BOM： Browser object model

Window Is a browser built-in global object （ Also called top-level object ）, All of us learn Webapi Knowledge is based on Window Object implemented . DOM BOM All belong to window object

Can be used anywhere window This object , You can omit it

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Time delayer

JavaScript Built in , Functions used to delay code execution , It's called setTimeout.

grammar ：

setTimeout( function , Delay Time )

Be careful ： setTimeout Execute only once , Usually omitted window

Clear delay function 

let timerId = setTimeout(fn

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