javascript typeof undfined
var x;
if (typeof x === 'undefined') {
// these statements execute
}javascript typeof undfined
var x;
if (typeof x === 'undefined') {
// these statements execute
}javascript if undefined
if(typeof comment === 'undefined') {
alert('Variable "comment" is undefined.');
} else if(comment === null){
alert('Variable "comment" is null.');
}how to check if object is undefined in javascript
if (typeof something === "undefined") {
alert("something is undefined");
}Copyright © 2021 Codeinu
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