Answers for "how to check if a variable is not defined in javascript"

checking if var is not defined js

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

Posted by: Guest on August-20-2020

javascript set variable if not defined

var x = (typeof x === 'undefined') ? your_default_value : x;

Posted by: Guest on July-28-2020

Code answers related to "how to check if a variable is not defined in javascript"