javascript check undefined or null

if( typeof myVar === 'undefined' || myVar === null ){
    // myVar is undefined or null
}

4.33
10
Awgiedawgie 440220 points

                                    Undefined  used for unintentionally missing values.

Null       used for intentionally missing values. 

4.33 (3 Votes)
0
3.6
5
Awgiedawgie 440220 points

                                    if (variable === null) { //Executes only if variable is null but not undefined
  //Code here
}

if (variable == null) { //Executes if variable is null OR undefined
  //Code here
}

3.6 (5 Votes)
0
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