javascript check undefined or null
if( typeof myVar === 'undefined' || myVar === null ){
// myVar is undefined or null
}
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4.33
10
Undefined used for unintentionally missing values.
Null used for intentionally missing values.
Thank you!
10
0
3.6
5
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
}
Thank you!
5
0
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