Answers for "javascript var undefined check"

javascript check for undefined

if (typeof myVariable === 'undefined'){
    //myVariable is undefined
}

Posted by: Guest on July-22-2019

checking if var is not defined js

if(typeof x !== 'undefined'){
  alert("Variable x is defined.");
}

Posted by: Guest on August-20-2020

check undefined in javascript

if (typeof myVariable === 'undefined'){
    //myVariable is undefined
}

Posted by: Guest on May-29-2021

Code answers related to "javascript var undefined check"