Answers for "check if variable exists"

javascript check if variable exists

if (typeof myVar !== 'undefined') {
    // myVar is defined
}

Posted by: Guest on July-23-2019

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

check if variable exists

if 'myVar' in locals():
  # myVar exists.
if 'myVar' in globals():
  # myVar exists.

Posted by: Guest on October-17-2021

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