Question

I started to make an really simple experiment, just to learn the basics of JavaScript. The problem is that I’m trying to move the events (like: onmouseover, onclick) from the HTML code to the external js file, that already contain the functions. I’ve tried few methods but nothing works.

I believe that must be something really simple, but I can’t figure it out now.
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Answer 1

You can assign event handlers programmatically, like this:

var elem = document.getElementById('your_click_target');
elem.addEventListener('click', your_click_handler);

More info here.