我如何通过CSS(层叠样式表)为一个div而不是整个页面自定义滚动条?
当前回答
或者像这样使用:
var MiniScroll=function(a,b){function e(){c.scrollUpdate()}function f(){var a=new Date,b=Math.abs(a-c.animation.frame),d=c.countScrollHeight();c.animation.frame=a,c.render(b),d.height!=c.controls.height&&(e(),c.controls.height=d.height),requestAnimationFrame(f)}function g(){c.scrollUpdate()}function h(a){var b=c.target.scrollTop,d=Math.abs(a.wheelDeltaY/(10-c.speed));c.target.scrollTop=a.wheelDeltaY>0?b-d:b+d,c.scrollUpdate()}function i(a){if(a.target.classList.contains("scroll"))return a.preventDefault(),!1;var b=c.countScrollHeight();c.target.scrollTop=a.offsetY*b.mul-parseInt(b.height)/2,c.scrollUpdate()}b=b||{};var c=this,d={speed:"speed"in b?b.speed:7};this.target=document.querySelector(a),this.animation={frame:new Date,stack:[]},this.identity="scroll"+parseInt(1e5*Math.random()),this.controls={place:null,scroll:null,height:0},this.speed=d.speed,this.target.style.overflow="hidden",this.draw(),requestAnimationFrame(f),this.target.onscroll=g,this.target.addEventListener("wheel",h),this.controls.place.onclick=i};MiniScroll.prototype.scrollUpdate=function(){this.controls.place.style.height=this.target.offsetHeight+"px";var a=this.countScrollHeight();this.controls.scroll.style.height=a.height,this.controls.scroll.style.top=a.top},MiniScroll.prototype.countScrollHeight=function(){for(var a=this.target.childNodes,b=parseInt(this.target.offsetHeight),c=0,d=0;d<a.length;d++)a[d].id!=this.identity&&(c+=parseInt(a[d].offsetHeight)||0);var e=this.target.offsetHeight*parseFloat(1/(parseFloat(c)/this.target.offsetHeight)),f=this.controls.place.offsetHeight*(this.target.scrollTop/c)+"px";return{mul:c/this.target.offsetHeight,height:e>b?b+"px":e+"px",top:f}},MiniScroll.prototype.draw=function(){var a=document.createElement("div"),b=document.createElement("div");a.className="scroll-place",b.className="scroll",a.appendChild(b),a.id=this.identity,this.controls.place=a,this.controls.scroll=b,this.target.insertBefore(a,this.target.querySelector("*")),this.scrollUpdate()},MiniScroll.prototype.render=function(a){for(var b=0;b<this.animation.stack.length;b++){var c=this.animation.stack[b],d=parseInt(c.target);c.element.style[c.prop]=d+c.points}};
并初始化:
<body onload="new MiniScroll(this);"></body>
和自定义:
.scroll-place { // ... // }
.scroll { // ... // }
其他回答
在Firefox +64中只使用CSS
.mycoldiv{
scrollbar-color: white rebeccapurple;
scrollbar-width: thin;
display: block;
height:400px;
overflow-x: auto;
}
更多信息:https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Scrollbars
Webkit浏览器(如Chrome, Safari和Opera)支持非标准的::-webkit-scrollbar伪元素，它允许我们修改浏览器滚动条的外观。
注意:Firefox、IE和Edge不支持::-webkit-scrollbar。
* { box-sizing: border-box; font-family: sans-serif; } div { width: 15rem; height: 8rem; padding: .5rem; border: 1px solid #aaa; margin-bottom: 1rem; overflow: auto; } .box::-webkit-scrollbar { width: .8em; } .box::-webkit-scrollbar-track { box-shadow: inset 0 0 6px rgba(0, 0, 0, .3); } .box::-webkit-scrollbar-thumb { background-color: dodgerblue; } <div class="box"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> </div> <div> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate</p> </div>
参考: 如何创建自定义滚动条
自定义滚动条无法使用CSS，您需要一些JavaScript魔法。
有些浏览器支持非规范的CSS规则，比如Webkit中的::-webkit-scrollbar，但这并不理想，因为它只能在Webkit中工作。IE也有类似的东西，但我认为他们不再支持它了。
我尝试了很多插件，他们中的大多数不支持所有的浏览器，我更喜欢iScroll和nanoScroller适用于所有这些浏览器:
Ie11 -> ie6 Ie10 - wp8 Ie9 - wp7 IE Xbox One IE Xbox 360 谷歌Chrome 火狐 歌剧 Safari
但iScroll不工作与触摸!
demo iScroll: http://lab.cubiq.org/iscroll/examples/simple/ 演示nanoScroller: http://jamesflorentino.github.io/nanoScrollerJS/
下面是一个适用于Chrome和Safari的webkit示例:
CSS:
::-webkit-scrollbar
{
width: 40px;
background-color:#4F4F4F;
}
::-webkit-scrollbar-button:vertical:increment
{
height:40px;
background-image: url(/Images/Scrollbar/decrement.png);
background-size:39px 30px;
background-repeat:no-repeat;
}
::-webkit-scrollbar-button:vertical:decrement
{
height:40px;
background-image: url(/Images/Scrollbar/increment.png);
background-size:39px 30px;
background-repeat:no-repeat;
}
输出:
