我有一个带iframe的页面...目前我使用此代码加载iframe onscroll ....
使用Javascript:
function lazyLoad() {
for (var e = document.getElementsByClassName("lazy"), t = 0; t < e.length; t++) isInViewport(e[t]) && (e[t].src = e[t].getAttribute("data-src"))
}
function isInViewport(e) {
var t = e.getBoundingClientRect();
return t.bottom >= 0 && t.right >= 0 && t.top <= (window.innerHeight || document.documentElement.clientHeight) && t.left <= (window.innerWidth || document.documentElement.clientWidth)
}
function registerListener(e, t) {
window.addEventListener ? window.addEventListener(e, t) : window.attachEvent("on" + e, t)
}
registerListener("load", lazyLoad), registerListener("scroll", lazyLoad);
HTML:
<iframe data-src='http://some-link.com' src='' class='lazy'/>
但是当我再次滚动时,即使只是稍微滚动,iframe也会重新加载。我可以帮助我在第二次滚动后再次加载iframe吗?谢谢!
DEMO:http://design-jarwo.blogspot.co.id/我将在我的博客www.kodejarwo.com
上使用它答案 0 :(得分:0)
您必须在触发后删除滚动事件侦听器:
function onScroll () {
if (lazyLoad()) {
window.removeEventListener('scroll', onScroll);
}
}
function onLoad () {
lazyLoad();
}
function lazyLoad() {
var loaded = false;
for (var e = document.getElementsByClassName("lazy"), t = 0; t < e.length; t++) {
isInViewport(e[t]) && (e[t].src = e[t].getAttribute("data-src"));
loaded = true;
}
return loaded;
}
function isInViewport(e) {
var t = e.getBoundingClientRect();
return t.bottom >= 0 && t.right >= 0 && t.top <= (window.innerHeight || document.documentElement.clientHeight) && t.left <= (window.innerWidth || document.documentElement.clientWidth)
}
function registerListener(e, t) {
window.addEventListener ? window.addEventListener(e, t) : window.attachEvent("on" + e, t)
}
registerListener("load", onLoad), registerListener("scroll", onScroll);