JavaScript - onClick to get the ID of the clicked button

Question

How do find the id of the button which is being clicked?

Answer 1

With pure javascript you can do the following:

var buttons = document.getElementsByTagName("button");
var buttonsCount = buttons.length;
for (var i = 0; i < buttonsCount; i += 1) {
    buttons[i].onclick = function(e) {
        alert(this.id);
    };
}​

check it On JsFiddle