Answers for "check undefined"

19

js if not undefined

if (typeof myVar !== "undefined") {
    console.log("myVar is DEFINED");
}
Posted by: Guest on October-23-2019
20

javascript check for undefined

if (typeof myVariable === 'undefined'){
    //myVariable is undefined
}
Posted by: Guest on July-22-2019
2

test if is undefined javascript

let id;

if(typeof id === 'undefined') {
    console.log("id is undefined...");
}
Posted by: Guest on August-10-2020
0

check undefined in javascript

if (typeof myVariable === 'undefined'){
    //myVariable is undefined
}
Posted by: Guest on May-29-2021
-1

undefined javascript check

if(undefinedElement === null) {
	console.log("Element is undefined");
}
Posted by: Guest on March-30-2020

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