① 变量声明
② @import
③ 样式声明
function lazyload() {
var images = .getElementsByTagName('img')
var len = images.length
var n = 0 return function () {
var seeHeight = .Element.clientHeight
for (var i = n; i < len; i++) {
if (images[i].getBoundingClientRect().top < seeHeight) {
if (images[i].getAttribute('src') === 'images/default.jpg') {
images[i].src = images[i].getAttribute('data-src')
}
n = n + 1
}
}}}
37题 | 被引用7次