How can I determine if a variable is 'undefined' or 'null'?

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耶瑟儿~
耶瑟儿~ 2020-11-22 03:30

How do I determine if variable is undefined or null?

My code is as follows:

var EmpN         


        
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  •  心在旅途
    2020-11-22 04:13

    if (variable == null) {
        // Do stuff, will only match null or undefined, this won't match false
    }
    

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