JQuery 窗口滚动事件?

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时间:2020-08-26 13:25:24  来源:igfitidea点击:

JQuery window scrolling event?

jqueryscroll

提问by Jai

I have an ad in my header and a fixed ad at the bottom of my page that is always there. I want the fixed ad to appear only if the user has scrolled under the header ad. I looked into the JQuery documentation, but I'm not really sure what I should use.

我的标题中有一个广告,页面底部有一个固定广告,它总是在那里。我希望固定广告仅在用户滚动到标题广告下方时出现。我查看了 JQuery 文档,但我不确定应该使用什么。

回答by Jai

Try this: http://jsbin.com/axaler/3/edit

试试这个:http: //jsbin.com/axaler/3/edit

$(function(){
  $(window).scroll(function(){
    var aTop = $('.ad').height();
    if($(this).scrollTop()>=aTop){
        alert('header just passed.');
        // instead of alert you can use to show your ad
        // something like $('#footAd').slideup();
    }
  });
});

回答by Kyle

See jQuery.scroll(). You can bind this to the window element to get your desired event hook.

请参阅jQuery.scroll()。您可以将其绑定到 window 元素以获得所需的事件挂钩。

On scroll, then simply check your scroll position:

在滚动时,只需检查您的滚动位置:

$(window).scroll(function() {
  var scrollTop = $(window).scrollTop();
  if ( scrollTop > $(headerElem).offset().top ) { 
    // display add
  }
});

回答by Jonathon Cwik

Check if the user has scrolled past the header ad, then display the footer ad.

检查用户是否已滚动过页眉广告,然后显示页脚广告。

if($(your header ad).position().top < 0) { $(your footer ad).show() }

if($(your header ad).position().top < 0) { $(your footer ad).show() }

Am I correct at what you are looking for?

我在寻找什么是正确的吗?