Ways to determine if an element is within the viewport and covers the full screen

I came across a solution on this website:

Although, the solution mentioned is specifically for determining if an element is visible within the viewport.

However: What I am trying to achieve is a bit different as I want to figure out if the element covers the entire viewport.

Answer №1

Verify if the top and left positions of an element are less than or equal to the current scroll or viewport position, and confirm that the height and width of the element are greater than or equal to the size of the viewport.

Answer №2

If you tweak the code a little bit, you can achieve great results with just a touch of jQuery:

$(window).resize(function () {
    myFeature.checkElementSize();
});

myFeature.checkElementSize = function (element) {

    // For jQuery users
    if (element instanceof jQuery) {
        element = element[0];
    }

    var rect = element.getBoundingClientRect();

    return (
        rect.top <= 0 &&
        rect.bottom >= (window.innerHeight || document.documentElement.clientHeight)
    );
}

checkElementSizeCallback = function (element) {
    var isBigger = myFeature.checkElementSize(element);
    // Add your custom logic here.
}

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