I am tracking mouse movements using the following JavaScript:

var mouseX = 0;
var mouseY = 0;

document.onmousemove = function (e) {
    mouseX = e.clientX;
    mouseY = e.clientY;
}

My problem is that if the mouse hasn't been moved since the page had been loaded, the mouseX and mouseY values both equal 0. How can I get the mouse values when the page is loaded as well as when the mouse is moved?

javascript mouse mouseevent
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