Hack https://humanbenchmark.com/tests/reactiontime

humanbenchmark-reactiontime.js

// paste into Google Chrome DevTools

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);
    });
}

let target = document.querySelector("div.view-splash")

let observer = new MutationObserver(m=>{
	if (target.getAttribute("class").includes('view-go')) {
		simulateMouseClick(target);
	}
	if (target.getAttribute("class").includes('view-result')) {
		simulateMouseClick(target);
	}
})

let option = {attributes:true, childList: true, characterData: true}
observer.observe(target, option)