Answers for "javascript detect if element is visible in viewport"

0

jquery check if element is visible in viewport

// this function runs every time you are scrolling

$(window).scroll(function() {
    var top_of_element = $("#element").offset().top;
    var bottom_of_element = $("#element").offset().top + $("#element").outerHeight();
    var bottom_of_screen = $(window).scrollTop() + $(window).innerHeight();
    var top_of_screen = $(window).scrollTop();

    if ((bottom_of_screen > top_of_element) && (top_of_screen < bottom_of_element)){
        // the element is visible, do something
    } else {
        // the element is not visible, do something else
    }
});
Posted by: Guest on June-06-2021
0

how to check if element is in viewport

function isInViewport(element) {
    const rect = element.getBoundingClientRect();
    return (
        rect.top >= 0 &&
        rect.left >= 0 &&
        rect.bottom <= ((window.innerHeight + rect.height) || document.documentElement.clientHeight) &&
        rect.right <= (window.innerWidth || document.documentElement.clientWidth)
    );
}

//optimized from the stackOverflow answer to account 
//for element heights and widths (in vertical/horizontal scrolling)
Posted by: Guest on October-26-2021

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