Answers for "javascript check if value undefined"

js if not undefined

if (typeof myVar !== "undefined") {
    console.log("myVar is DEFINED");
}

Posted by: Guest on October-23-2019

test if is undefined javascript

let id;

if(typeof id === 'undefined') {
    console.log("id is undefined...");
}

Posted by: Guest on August-10-2020

undefined javascript check

if(undefinedElement === null) {
	console.log("Element is undefined");
}

Posted by: Guest on March-30-2020

Code answers related to "javascript check if value undefined"