How to trigger click on a button

Question

I\'ve this page. I need to trigger a click on the BUY NOW button on this page using AngularJS.

I\'ve tried these ways to click on this \"BUY NOW\" in content script(

Answer 1

What about Vanilla JS, noone prohibited?

Such as "onlick/click"?

function ae(a,b,c) {
 if (a.addEventListener)
     a.addEventListener (b,c,false);
 else if (a.attachEvent)
     a.attachEvent ('on'+b,c); 
}
function re(a,b,c) {
 if (a.removeEventListener) 
    a.removeEventListener (b,c,false);
 if (a.detachEvent)
    a.detachEvent ('on'+b,c); 
}

Answer 2

Try with this code; it simulates a mouse left click on the element by a quick succession of mousedown, mouseup and click events fired in the center of the button:

var simulateMouseEvent = function(element, eventName, coordX, coordY) {
  element.dispatchEvent(new MouseEvent(eventName, {
    view: window,
    bubbles: true,
    cancelable: true,
    clientX: coordX,
    clientY: coordY,
    button: 0
  }));
};

var theButton = document.querySelector('ul form button');

var box = theButton.getBoundingClientRect(),
        coordX = box.left + (box.right - box.left) / 2,
        coordY = box.top + (box.bottom - box.top) / 2;

simulateMouseEvent (theButton, "mousedown", coordX, coordY);
simulateMouseEvent (theButton, "mouseup", coordX, coordY);
simulateMouseEvent (theButton, "click", coordX, coordY);