Community Learn Tools Library Leisure

English

Home > Web Front-end > JS Tutorial > js hide and show back to top button and window.onscroll event application_javascript skills

js hide and show back to top button and window.onscroll event application_javascript skills

WBOY

Release： 2016-05-16 17:42:47

Original

1089 people have browsed it

Now most websites will add this function: when the scroll bar scrolls to the bottom of the page, a "back to top" button or link will be displayed in the lower right corner of the page. After clicking the button, the page will jump to the top, or A suitable location for viewing the content.

So, how to control the display or hiding of the "Back to Top" button? In fact, we only need to implement the window.onscroll event. The code is as follows:

Copy the code The code is as follows:

 
window.onscroll = function () { 
if (document.documentElement.scrollTop document.body.scrollTop > 100) { 
document.getElementById("scrollto").style.display = "block" ; 
} 
else { 
document.getElementById("scrollto").style.display = "none"; 
} 
} 

scrollto is the page Container (div tag) on "back to top"

Related labels：

js显示隐藏回到顶部按钮 onscroll

source：php.cn

Previous article：The problem of appendchild appending a page element to another page element_javascript skills Next article：JavaScript conversion lunar calendar class implementation and calling method_javascript skills

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn