Answers for "check in javascript defined or not"

checking if var is not defined js

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

Posted by: Guest on August-20-2020

check if isset variable js

var status = 'Variable exists'

try {
  myVar
} catch (ReferenceError) {
  status = 'Variable does not exist'
}

console.log(status)

Posted by: Guest on November-20-2020

Code answers related to "check in javascript defined or not"