jQuery 如何滚动到页面中间（50%）
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How to scroll to middle (50%) of page
提问by Steve
Without using the popular scrollTo plugin, how can I scroll to the vertical middle (50%) of the page/div?
不使用流行的 scrollTo 插件，如何滚动到页面/div 的垂直中间（50%）？
回答by Bart Vangeneugden
This scrolls the internal scroll of a div to it's vertical middle
这会将 div 的内部滚动滚动到它的垂直中间
var myDiv = $("#yourdiv");
var scrollto = myDiv.offset().top + (myDiv.height() / 2);
myDiv.animate({ scrollTop: scrollto});
回答by jaheraho
JQuery - jump to vert/hori middle of scroll-div
JQuery - 跳转到滚动 div 的 vert/hori 中间
vertical
垂直的
$("#centralize-ver").click(function(){//centralize vertical
var scrollableDivJ=$("#scroll-div");
scrollableDivJ.scrollTop("1000000");//scroll to max
var scrollHeight=scrollableDivJ.prop("scrollHeight");
var diff=(scrollHeight-scrollableDivJ.scrollTop())/2;
var middle=scrollHeight/2-diff;
scrollableDivJ.scrollTop(middle);
});
horizontal
水平的
$("#centralize-hor").click(function(){//centralize horizontal
var scrollableDivJ=$("#scroll-div");
scrollableDivJ.scrollLeft("1000000");//scroll to max
var scrollWidth=scrollableDivJ.prop("scrollWidth");
var diff=(scrollWidth-scrollableDivJ.scrollLeft())/2;
var middle=scrollWidth/2-diff;
scrollableDivJ.scrollLeft(middle);
});
Replace "#scroll-div" with your div. "body" isn't working for me.
用你的 div 替换“#scroll-div”。“身体”对我不起作用。
Thats the only solution that works properly for me. Actually its an 2h-try'n'error solution thats do its job pretty well. Maybe someone could explain why scrollTop is never reaching the value of prop("scrollheight") and the written calculation of diff and middle is necessary.
那是唯一适合我的解决方案。实际上，它是一个 2h-try'n'error 解决方案，可以很好地完成它的工作。也许有人可以解释为什么 scrollTop 永远不会达到 prop("scrollheight") 的值，并且 diff 和 middle 的书面计算是必要的。
