javascript check if not undefined
if (typeof myVar !== "undefined") {
console.log("myVar is DEFINED");
}
Log in, to leave a comment
3.6
5
let id;
if(typeof id === 'undefined') {
console.log("id is undefined...");
}
Thank you!
5
3.6
(5 Votes)
0
4
8
if(typeof x !== 'undefined'){
alert("Variable x is defined.");
}
Thank you!
8
4
(8 Votes)
0
4.25
4
if(typeof myVar !== "undefined")
Thank you!
4
4.25
(4 Votes)
0
4
6
if ( typeof query !== 'undefined' && query )
{
//do stuff if query is defined and not null
}
else
{
}
Thank you!
6
4
(6 Votes)
0
3.8
10
if (typeof myVariable === 'undefined'){<br/> //myVariable is undefined<br/>}
Thank you!
10
3.8
(10 Votes)
0
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