Answers for "how to check if variable exists javascript"

javascript check if variable exists

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

Posted by: Guest on July-23-2019

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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