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showing results for - "what is undefined in javascript"
Karlee
10 Aug 2019
1if (typeof myVariable === 'undefined'){
2    //myVariable is undefined
3}
source
Lucas
26 Jan 2019
1if(typeof comment === 'undefined') {
2
3  alert('Variable "comment" is undefined.');
4
5} else if(comment === null){
6
7  alert('Variable "comment" is null.');
8
9}
source
Alberto
01 Jun 2017
1The undefined property indicates that a variable has not been assigned a value, 
2or not declared at all.
Emilie
07 Jan 2018
1let car;    // Value is undefined, type is undefined
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