JS addEvent() and onclick method

JS addEvent() and onclick method

The two statements of event handling in JS :

The two statements of event handling in JS :

const btn = document.querySelector('button');

#1. btn.onclick = function(e) {

// some stmts


#2. btn.addEventListener('clcik', function(e) {

// Some stmts


I often found replacing the first one - #1. with the second one - #2. didn't work.

Is there any functional difference between the two?

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