Explicit way to check whether a function was called from within the Window

Just check if this is window:

function get_caller() {
  if (this === window) {
    console.log('function get_caller called from window')
  }
  else {
    console.log('function get_caller called by button press')
  }
}

btn.addEventListener('click', get_caller)
get_caller()

<button id="btn">Get caller</button>

Tags:

Javascript

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