apex4x/Templates/Buttons/Standard/js/setup.js

The Comprehensive ARIA Development Suite

$A.import("Button", { defer: true }, function () {
  $A.setButton(".aria-button.SF", {
    onActivate: function (ev, triggerNode) {
      // Do something.
      alert("It's where it's at!");
      ev.preventDefault();
    },
  });
});