无聊，不想用 jquery lazyload，自己手工写了个简短代码，欢迎批评指正收藏

(function () { var sign = "lazy"; var imgsArray = []; var imgs = document.getElementsByTagName('img'); for (var i = 0; i < imgs.length; i++) { var img = imgs[i]; var dsrc = img.getAttribute('data-src'); var cname = img.className; if (cname && cname.indexOf(sign) >= 0 && dsrc && img.src != dsrc) { imgsArray.push(img); } } var b = document.body; var loadAreaImages = function () { var bst = b.scrollTop; var bsl = b.scrollLeft; var ih = window.innerHeight; var iw = window.innerWidth; for (var i = 0; i < imgsArray.length; i++) { var img = imgsArray[i]; var dsrc = img.getAttribute('data-src'); if (dsrc && img.src != dsrc) { var iot = img.offsetTop; var iol = img.offsetLeft; if (ih + bst + 100 >= iot && iw + bsl + 100 >= iol && bst - 100 <= iot && bsl - 100 <= iol) { img.src = dsrc; } } } } var lst = null; var loadImages = function () { if (lst) { clearTimeout(lst); } lst = setTimeout(loadAreaImages, 500); } var bind = function (e, f) { var l = window.addEventListener; var w = window.attachEvent; l ? l(e, f, true) : w('on' + e, f); } var eves = ['load', 'scroll', 'resize']; for (var e in eves) bind(eves[e], loadImages, true); })();