Simulating a mousedown, click, mouseup sequence in Tampermonkey?

Question

I would like to simulate a whole click not just

document.getElementsByClassName()[0].click();

How do I do that? Search results all seem t

Answer 1

I improved Brock's code a little after it worked as expected for me.

Definition:

function simulateMouseClick(targetNode) {
    function triggerMouseEvent(targetNode, eventType) {
        var clickEvent = document.createEvent('MouseEvents');
        clickEvent.initEvent(eventType, true, true);
        targetNode.dispatchEvent(clickEvent);
    }
    ["mouseover", "mousedown", "mouseup", "click"].forEach(function(eventType) { 
        triggerMouseEvent(targetNode, eventType);
    });
}

Calling examples:

simulateMouseClick(document);

simulateMouseClick(document.querySelector("a[href*='stackoverflow']"));