Javascript 滚动条上的多个固定标题
假设我有如下标题Javascript 滚动条上的多个固定标题,javascript,jquery,css,Javascript,Jquery,Css,假设我有如下标题 <h1 class="fixontop">heading 1</h1> content goes here. . . . long paragraph. <h1 class="fixontop">heading 2</h1> 2nd content goes here. . . . long paragraph. <h1 class="fixontop">heading 3</h1> 3nd content
<h1 class="fixontop">heading 1</h1>
content goes here.
.
.
.
long paragraph.
<h1 class="fixontop">heading 2</h1>
2nd content goes here.
.
.
.
long paragraph.
<h1 class="fixontop">heading 3</h1>
3nd content goes here.
.
.
.
long paragraph.
这是小提琴看看这个
我认为使用类似插件的航路点来达到这样的目的是一个好主意
var scrollTimeout;
var breakpoints = [];
function fix_heading(heading){
if( heading.hasClass('heading-fixed'))
return
heading
.addClass('heading-fixed')
// prevent content jumping
.parents('section').css('padding-top', heading.height())
}
function unfix_heading(heading){
if(! heading.hasClass('heading-fixed'))
return
heading
.removeClass('heading-fixed')
.parents('section').css('padding-top', 0);
}
function fix_headings(breakpoints){
clearTimeout(scrollTimeout);
scrollTimeout = setTimeout(function(){
$(breakpoints).each(function(){
var breakpoint = this;
var breakpoint_heading = $('.fixontop[data-fix-on='+breakpoint+']')
if(document.body.scrollTop > breakpoint ){
fix_heading(breakpoint_heading)
}
if(document.body.scrollTop < ( breakpoint )){
unfix_heading(breakpoint_heading)
}
//scrolled out of parent container
if(document.body.scrollTop > (breakpoint + breakpoint_heading.parents('section').outerHeight())){
unfix_heading(breakpoint_heading)
}
})
}, 30) //timeout here for better performance
}
$(function(){
//setup breakpoints
$('.fixontop').each(function(){
breakpoints.push ($(this).position().top)
$(this).attr('data-fix-on', $(this).position().top)
})
$(document).scroll(function(){fix_headings(breakpoints)})
})
var滚动超时;
var断点=[];
函数固定单元标题(标题){
if(heading.hasClass('heading-fixed'))
返回
标题
.addClass('heading-fixed')
//防止内容跳转
.parents('section').css('padding-top',heading.height())
}
功能取消固定标题(标题){
如果(!heading.hasClass('heading-fixed'))
返回
标题
.removeClass('heading-fixed')
.parents('section').css('padding-top',0);
}
函数修复标题(断点){
clearTimeout(滚动超时);
scrollTimeout=setTimeout(函数(){
$(断点)。每个(函数(){
var断点=这个;
var breakpoint_heading=$('.fixontop[data fix on='+breakpoint+']))
if(document.body.scrollTop>断点){
修复标题(断点标题)
}
if(document.body.scrollTop<(断点)){
取消固定标题(断点标题)
}
//从父容器中滚出
if(document.body.scrollTop>(断点+断点\u heading.parents('section').outerHeight()){
取消固定标题(断点标题)
}
})
},30)//此处超时以获得更好的性能
}
$(函数(){
//设置断点
$('.fixontop')。每个(函数(){
breakpoints.push($(this.position().top)
$(this.attr('data-fix-on',$(this.position().top))
})
$(文档).scroll(函数(){fix_标题(断点)})
})
尝试使用.each()
以每个元素的.fixontop
类为目标。可能的重复项
var scrollTimeout;
var breakpoints = [];
function fix_heading(heading){
if( heading.hasClass('heading-fixed'))
return
heading
.addClass('heading-fixed')
// prevent content jumping
.parents('section').css('padding-top', heading.height())
}
function unfix_heading(heading){
if(! heading.hasClass('heading-fixed'))
return
heading
.removeClass('heading-fixed')
.parents('section').css('padding-top', 0);
}
function fix_headings(breakpoints){
clearTimeout(scrollTimeout);
scrollTimeout = setTimeout(function(){
$(breakpoints).each(function(){
var breakpoint = this;
var breakpoint_heading = $('.fixontop[data-fix-on='+breakpoint+']')
if(document.body.scrollTop > breakpoint ){
fix_heading(breakpoint_heading)
}
if(document.body.scrollTop < ( breakpoint )){
unfix_heading(breakpoint_heading)
}
//scrolled out of parent container
if(document.body.scrollTop > (breakpoint + breakpoint_heading.parents('section').outerHeight())){
unfix_heading(breakpoint_heading)
}
})
}, 30) //timeout here for better performance
}
$(function(){
//setup breakpoints
$('.fixontop').each(function(){
breakpoints.push ($(this).position().top)
$(this).attr('data-fix-on', $(this).position().top)
})
$(document).scroll(function(){fix_headings(breakpoints)})
})