当前元素距离文档顶部距离-代码封装

Posted 2021-01-11 ivan5277

function getPositionTop(node) {
        var top = node.offsetTop;
        var parent = node.offsetParent;
        while(parent != null) {
            top += parent.offsetTop;
            parent = parent.offsetParent;
        }
        return top;
    };