但是锚点也有个问题通常点击锚点后页面会立即跳到目标位置而本文介绍的方法实现了锚点(Anchor)间平滑跳转效果非常不错。
// 说明 用 Javascript 实现锚点(Anchor)间平滑跳转
// 来源 ThickBox 2.1
// 整理 Yanfu Xie [xieyanfuyahoo.com.cn]
// 日期 07.01.17
// 转换为数字
function intval(v)
{
v parseInt(v);
return isNaN(v) ? 0 : v;
}
// 获取元素信息
function getPos(e)
{
var l 0;
var t 0;
var w intval(e.style.width);
var h intval(e.style.height);
var wb e.offsetWidth;
var hb e.offsetHeight;
while (e.offsetParent){
l e.offsetLeft (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0);
t e.offsetTop (e.currentStyle?intval(e.currentStyle.borderTopWidth):0);
e e.offsetParent;
}
l e.offsetLeft (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0);
t e.offsetTop (e.currentStyle?intval(e.currentStyle.borderTopWidth):0);
return {x:l, y:t, w:w, h:h, wb:wb, hb:hb};
}
// 获取滚动条信息
function getScroll()
{
var t, l, w, h;
if (document.documentElement document.documentElement.scrollTop;
l document.documentElement.scrollLeft;
w document.documentElement.scrollWidth;
h document.documentElement.scrollHeight;
} else if (document.body) {
t document.body.scrollTop;
l document.body.scrollLeft;
w document.body.scrollWidth;
h document.body.scrollHeight;
}
return { t: t, l: l, w: w, h: h };
}
// 锚点(Anchor)间平滑跳转
function scroller(el, duration)
{
if(typeof el ! object) { el document.getElementById(el); }
if(!el) return;
var z this;
z.el el;
z.p getPos(el);
z.s getScroll();
z.clear function(){window.clearInterval(z.timer);z.timernull};
z.t(new Date).getTime();
z.step function(){
var t (new Date).getTime();
var p (t - z.t) / duration;
if (t > duration z.t) {
z.clear();
window.setTimeout(function(){z.scroll(z.p.y, z.p.x)},13);
} else {
st ((-Math.cos(p*Math.PI)/2) 0.5) * (z.p.y-z.s.t) z.s.t;
sl ((-Math.cos(p*Math.PI)/2) 0.5) * (z.p.x-z.s.l) z.s.l;
z.scroll(st, sl);
}
};
z.scroll function (t, l){window.scrollTo(l, t)};
z.timer window.setInterval(function(){z.step();},13);
}
调用方式
scroller(el, duration)
el : 目标锚点 ID
duration : 持续时间以毫秒为单位越小越快
HTML:
div.test {
width:400px;
margin:5px auto;
border:1px solid #ccc;
}
div.test strong {
font-size:16px;
background:#fff;
border-bottom:1px solid #aaa;
margin:0;
display:block;
padding:5px 0;
text-decoration:underline;
color:#059B9A;
cursor:pointer;
}
div.test p {
height:400px;
background:#f1f1f1;
margin:0;
}
header_1 --> header_4
header_2 --> header_5
header_3 --> header_6
header_4 --> header_7
header_5 --> header_3
header_6 --> header_2
header_7 --> header_1
测试代码
用 Javascript 实现锚点(Anchor)间平滑跳转 - 平滑, 锚点, Anchor, 跳转, 滚动, Javascript,用 Javascript 实现锚点(Anchor)间平滑跳转
// 说明 用 Javascript 实现锚点(Anchor)间平滑跳转
// 来源 ThickBox 2.1
// 整理 Yanfu Xie [xieyanfuyahoo.com.cn]
// 日期 07.01.17
// 转换为数字
function intval(v)
{
v parseInt(v);
return isNaN(v) ? 0 : v;
}
// 获取元素信息
function getPos(e)
{
var l 0;
var t 0;
var w intval(e.style.width);
var h intval(e.style.height);
var wb e.offsetWidth;
var hb e.offsetHeight;
while (e.offsetParent){
l e.offsetLeft (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0);
t e.offsetTop (e.currentStyle?intval(e.currentStyle.borderTopWidth):0);
e e.offsetParent;
}
l e.offsetLeft (e.currentStyle?intval(e.currentStyle.borderLeftWidth):0);
t e.offsetTop (e.currentStyle?intval(e.currentStyle.borderTopWidth):0);
return {x:l, y:t, w:w, h:h, wb:wb, hb:hb};
}
// 获取滚动条信息
function getScroll()
{
var t, l, w, h;
if (document.documentElement document.documentElement.scrollTop;
l document.documentElement.scrollLeft;
w document.documentElement.scrollWidth;
h document.documentElement.scrollHeight;
} else if (document.body) {
t document.body.scrollTop;
l document.body.scrollLeft;
w document.body.scrollWidth;
h document.body.scrollHeight;
}
return { t: t, l: l, w: w, h: h };
}
// 锚点(Anchor)间平滑跳转
function scroller(el, duration)
{
if(typeof el ! object) { el document.getElementById(el); }
if(!el) return;
var z this;
z.el el;
z.p getPos(el);
z.s getScroll();
z.clear function(){window.clearInterval(z.timer);z.timernull};
z.t(new Date).getTime();
z.step function(){
var t (new Date).getTime();
var p (t - z.t) / duration;
if (t > duration z.t) {
z.clear();
window.setTimeout(function(){z.scroll(z.p.y, z.p.x)},13);
} else {
st ((-Math.cos(p*Math.PI)/2) 0.5) * (z.p.y-z.s.t) z.s.t;
sl ((-Math.cos(p*Math.PI)/2) 0.5) * (z.p.x-z.s.l) z.s.l;
z.scroll(st, sl);
}
};
z.scroll function (t, l){window.scrollTo(l, t)};
z.timer window.setInterval(function(){z.step();},13);
}
div.test {
width:400px;
margin:5px auto;
border:1px solid #ccc;
}
div.test strong {
font-size:16px;
background:#fff;
border-bottom:1px solid #aaa;
margin:0;
display:block;
padding:5px 0;
text-decoration:underline;
color:#059B9A;
cursor:pointer;
}
div.test p {
height:400px;
background:#f1f1f1;
margin:0;
}
header_1 --> header_4
header_2 --> header_5
header_3 --> header_6
header_4 --> header_7
header_5 --> header_3
header_6 --> header_2
header_7 --> header_1
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