Uncaught TypeError: Cannot read property 'addEventListener' of undefined
Updated at 11-Jan-2021,
By samar
Uncaught TypeError: Cannot read property 'addEventListener' of undefined
With this article, we will examine several different instances of how to solve the "Uncaught TypeError: Cannot read property 'addEventListener' of undefined".
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<script> var el = document.getElementById('overlayBtn'); if(el){ el.addEventListener('click', swapper, false); } </script>You can simply check variable (el) before adding an event listener to element. If element exists then it will add a click event to it.
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