The front end of the LAC carrier js-

Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/qq_36251118/article/details/88052668

Realization of ideas: When the document height = total height of height + scroll through a screen, to achieve loaded

    //获取滚动条当前的位置 
    function getScrollTop() {
        var scrollTop = 0;
        if(document.documentElement && document.documentElement.scrollTop) {
            scrollTop = document.documentElement.scrollTop;
        } else if(document.body) {
            scrollTop = document.body.scrollTop;
        }
        return scrollTop;
    }

    //获取当前可视范围的高度 
    function getClientHeight() {
        var clientHeight = 0;
        if(document.body.clientHeight && document.documentElement.clientHeight) {
            clientHeight = Math.min(document.body.clientHeight, document.documentElement.clientHeight);
        } else {
            clientHeight = Math.max(document.body.clientHeight, document.documentElement.clientHeight);
        }
        return clientHeight;
    }

    //获取文档完整的高度 
    function getScrollHeight() {
        return Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
    }
    
    //滚动事件触发
    window.onscroll = function() {
        if(getScrollTop() + getClientHeight() == getScrollHeight()) {
        }
    }