Answers for "js how to check is undefined and is not defined"

js if not undefined

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

Posted by: Guest on October-23-2019

checking if var is not defined js

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

Posted by: Guest on August-20-2020

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