使用曲线将输入范围弧形拇指连接到滑块
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【中文标题】使用曲线将输入范围弧形拇指连接到滑块【英文标题】：Connecting input range arc thumb to slider with curve 【发布时间】：2020-10-24 15:18:02 【问题描述】：我有一个已解决的问题Animating range ticks when moving range thumb。从那个问题，我有一个具有自定义外观的input type="range" - 拇指被做成一个弧形（半圆），span 采用范围的值并被设计为一个圆圈拇指和div 和mask 就像滴答声 - 步骤。
从这个预期的结果
我试图用曲线将该弧线连接到滑块。我尝试使用伪元素，但渐变与滑块上的渐变不同步，我无法制作如图所示的曲线。我还尝试使用 JS 画布 来绘制该曲线并将其放置在所需的位置，但渐变再次不同步 - 变为固定颜色。
我想使用 CSS 掩码，但我不确定是否可以用它制作想要的曲线。
这些是我的主要研究点：
CSS Tricks - Styling Cross-Browser Compatible Range Inputs Gradient Stroke Along Curve in Canvas - 试图用画布制作类似的曲线（连接点）这是我的CodePen 和代码
// Position of span that shows range value and tick curve position
const tickContainer = document.getElementById('tickContainer');
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () =>
// Span position and inner value
const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
const newPosition = 35 - (newValue * 0.7);
rangeV.style.left = `calc($newValue% + ($newPositionpx))`;
rangeV.innerhtml = `<span>$range.value%</span>`;
// Tick curve position
tickContainer.style.setProperty('--p', `calc($newValue%)`);
;
// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);body
font-family: Arial;
margin: 50px;
.range-wrap
position: relative;
/* Styling of ticks (lines) over the range */
.ticks
position: absolute;
left: -15px;
right: -15px;
padding:0 15px;
top: -30px;
height: 45px;
background: repeating-linear-gradient(to right, #D3D3D3 0 1px, transparent 1px 9px);
background-clip:content-box;
-webkit-mask:
radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent)
var(--p) 0px/100px 50px,
linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
linear-gradient(#fff, #fff) bottom /100% 10px;
-webkit-mask-repeat: no-repeat;
-webkit-mask-composite: source-over,destination-out;
mask:
radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent)
var(--p) 0px/100px 50px,
linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
linear-gradient(#fff, #fff) bottom /100% 10px;
mask-repeat: no-repeat;
mask-composite: exclude;
/* Styling the range */
input[type=range]
-webkit-appearance: none;
appearance: none;
margin: 20px 0;
width: 100%;
height: 4px;
background-image: linear-gradient(125deg, #e0e0e0 34%, rgb(0,12,110) 100%);
outline: none;
transition: all 100ms ease;
/* Range track */
input[type=range]::-webkit-slider-runnable-track
width: 100%;
height: 4px;
cursor: pointer;
border-radius: 25px;
input[type=range]::-moz-range-track
width: 100%;
height: 4px;
cursor: pointer;
border-radius: 25px;
/* Range thumb */
input[type=range]::-webkit-slider-thumb
height: 70px;
width: 70px;
-webkit-transform: translateY(-44.3%) rotate(-45deg);
transform: translateY(-44.3%) rotate(-45deg);
-webkit-appearance: none;
appearance: none;
background: #ddd;
border: 3px solid transparent;
border-color: transparent transparent #fff #fff;
border-radius: 50%;
cursor: pointer;
background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, rgb(0,12,110) 100%);
background-attachment: fixed, fixed;
background-clip: padding-box, border-box;
transition: all 200ms ease;
input[type=range]::-moz-range-thumb
height: 63px;
width: 63px;
appearance: none;
background: #ddd;
border: 3px solid transparent;
transition: all 200ms ease;
border-color: transparent transparent #fff #fff;
border-radius: 50%;
cursor: pointer;
background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, rgb(0,12,110) 100%);
background-attachment: fixed, fixed;
background-clip: padding-box, border-box;
/* Range value (label) inside of range thumb */
.range-value
position: absolute;
top: -50%;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
z-index: 99;
user-select: none;
select: none;
pointer-events: none;
.range-value span
width: 50px;
height: 50px;
line-height: 50px;
text-align: center;
color: #fff;
background: rgb(0,12,110);
font-size: 18px;
display: block;
position: absolute;
top: 20px;
border-radius: 50%;
user-select: none;
select: none;
pointer-events: none;
z-index: 100;
<div class="range-wrap">
<!-- Ticks (lines) over slider -->
<div class="ticks" id="tickContainer">
</div>
<!-- Range value inside of range thumb -->
<div class="range-value" id="rangeValue"></div>
<!-- Range itself -->
<input id="range" type="range" min="1" max="100" value="5" step="1">
</div>【问题讨论】：
【参考方案1】：这是一个不同的想法，我将像以前的答案一样依赖蒙版，但这次我将介绍弯曲部分的 SVG。我也会稍微优化一下代码，减少代码。
您会注意到，我对刻度和范围元素使用了相同的掩码，但使用了一些不同的值，因为刻度需要有更大的曲线。
// Position of span that shows range value and tick curve position
const tickContainer = document.querySelector('.range-wrap');
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () =>
// Span position and inner value
const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
const newPosition = 30 - (newValue * 0.6);
rangeV.style.left = `calc($newValue% + ($newPositionpx))`;
rangeV.innerHTML = `$range.value%`;
// Tick curve position
tickContainer.style.setProperty('--p', `calc($newValue%)`);
;
// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);body
font-family: Arial;
margin: 50px;
.range-wrap
position: relative;
--svg:url("data:image/svg+xml;utf8, <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 15 64 50' preserveAspectRatio='none' ><path d='M0 64 C16 64 16 32 32 32 C48 32 48 64 64 64 L64 48 C52 48 52 16 32 16 C12 16 12 48 0 48 L0 64 Z' fill='white'/></svg>") var(--p,0) 0;
/* Styling of ticks (lines) over the range */
.ticks
--sw:120px; /* control the width of the curve */
position: absolute;
left: -30px;
right: -30px;
padding:0 10px;
height: 50px;
background: repeating-linear-gradient(to right, red 0 3px, transparent 1px 9px) content-box;
-webkit-mask:var(--svg) /var(--sw) 50px,
linear-gradient(to right, #fff calc(50% - var(--sw)/2 + 1px), transparent 0 calc(50% + var(--sw)/2 - 1px), #fff 0)
right var(--p) top 33px/calc(200% - var(--sw)) 16px;
-webkit-mask-repeat:no-repeat;
z-index:999;
/* Styling the range */
input[type=range]
--sw:100px; /* control the width of the curve */
-webkit-appearance: none;
appearance: none;
margin: 20px 0 20px -20px;
padding:0 20px;
width:100%;
height: 90px;
-webkit-mask:
var(--svg) /var(--sw) 50px,
linear-gradient(to right, #fff calc(50% - var(--sw)/2 + 1px), transparent 0 calc(50% + var(--sw)/2 - 1px), #fff 0)
right var(--p) top 33px/calc(200% - var(--sw)) 16px;
-webkit-mask-repeat:no-repeat;
background: linear-gradient(125deg, #e0e0e0 34%, rgb(0,12,110) 100%);
outline: none;
/* Range track */
input[type=range]::-webkit-slider-runnable-track
width: 100%;
height: 50px;
cursor: pointer;
border-radius: 25px;
input[type=range]::-moz-range-track
width: 100%;
height: 50px;
cursor: pointer;
border-radius: 25px;
/* Range thumb */
input[type=range]::-webkit-slider-thumb
height: 60px;
width: 60px;
-webkit-appearance: none;
appearance: none;
border-radius: 50%;
cursor: pointer;
opacity:0;
input[type=range]::-moz-range-thumb
height: 60px;
width: 60px;
appearance: none;
border-radius: 50%;
cursor: pointer;
opacity:0;
/* Range value (label) inside of range thumb */
.range-value
width: 50px;
height: 50px;
line-height: 50px;
text-align: center;
color: #fff;
background: rgb(0,12,110);
font-size: 18px;
position: absolute;
transform:translateX(-50%);
top: 45px;
border-radius: 50%;
user-select: none;
select: none;
pointer-events: none;
<div class="range-wrap">
<!-- Ticks (lines) over slider -->
<div class="ticks" id="tickContainer">
</div>
<!-- Range value inside of range thumb -->
<div class="range-value" id="rangeValue"></div>
<!-- Range itself -->
<input id="range" type="range" min="1" max="100" value="5" step="1">
</div>更新
OP使用的最终版本：
// Position of span that shows range value and tick curve position
const tickContainer = document.querySelector('.range-wrap');
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () =>
// Span position and inner value
const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
const newPosition = 30 - (newValue * 0.6);
rangeV.style.left = `calc($newValue% + ($newPositionpx))`;
rangeV.innerHTML = `$range.value%`;
// Tick curve position
tickContainer.style.setProperty('--p', `calc($newValue%)`);
;
// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);body
font-family: Arial;
margin: 0;
min-height: 100vh;
padding: 50px;
box-sizing: border-box;
text-align:center;
.range-wrap
position: relative;
--svg:url("data:image/svg+xml;utf8, <svg width='97' height='37' viewBox='0 1.5 97 37' xmlns='http://www.w3.org/2000/svg'><path d='M0 35C14 35 13 2 48.5 2C84 2 80.5 35 97 35' fill='none' stroke='white' stroke-width='4'/></svg>") var(--p,0) 0;
</svg>
/* Styling of ticks (lines) over the range */
.ticks
--sw:120px; /* control the width of the curve */
position: absolute;
left: -30px;
right: -30px;
top: 0px;
padding:0 10px;
height: 50px;
background: repeating-linear-gradient(to right, #D3D3D3 0 1px, transparent 1px 10px) content-box;
-webkit-mask:var(--svg) /var(--sw) 50px,
linear-gradient(to right, #fff calc(50% - var(--sw)/2 + 1px), transparent 0 calc(50% + var(--sw)/2 - 1px), #fff 0)
right var(--p) top 38px/calc(200% - var(--sw)) 6px;
-webkit-mask-repeat:no-repeat;
z-index:999;
/* Styling the range */
input[type=range]
--sw:100px; /* control the width of the curve */
-webkit-appearance: none;
appearance: none;
margin: 20px 0 20px -20px;
padding:0 20px;
width: 100%;
height: 60px;
-webkit-mask:
var(--svg) /var(--sw) 41px,
linear-gradient(to right, #fff calc(50% - var(--sw)/2 + 1px), transparent 0 calc(50% + var(--sw)/2 - 1px), #fff 0)
right var(--p) top 34.45px/calc(200% - var(--sw)) 4px;
-webkit-mask-repeat:no-repeat;
background: linear-gradient(125deg, #e0e0e0 34%, rgb(0,12,110) 100%);
outline: none;
/* Range track */
input[type=range]::-webkit-slider-runnable-track
width: 100%;
height: 50px;
cursor: pointer;
border-radius: 25px;
input[type=range]::-moz-range-track
width: 100%;
height: 50px;
cursor: pointer;
border-radius: 25px;
/* Range thumb */
input[type=range]::-webkit-slider-thumb
height: 60px;
width: 60px;
-webkit-appearance: none;
appearance: none;
border-radius: 50%;
cursor: pointer;
opacity:0;
input[type=range]::-moz-range-thumb
height: 60px;
width: 60px;
appearance: none;
border-radius: 50%;
cursor: pointer;
opacity:0;
/* Range value (label) inside of range thumb */
.range-value
width: 55px;
height: 55px;
line-height: 60px;
text-align: center;
color: #fff;
background: rgb(0,12,110);
font-size: 18px;
position: absolute;
transform:translateX(-50%);
top: 32px;
border-radius: 50%;
user-select: none;
select: none;
pointer-events: none;
<h2>Custom range slider with ticks</h2>
<div class="range-wrap">
<!-- Ticks (lines) over slider -->
<div class="ticks" id="tickContainer">
</div>
<!-- Range value inside of range thumb -->
<div class="range-value" id="rangeValue"></div>
<!-- Range itself -->
<input id="range" type="range" min="1" max="100" value="5" step="1">
</div>【讨论】：
不错的答案。不过，是否有可能将圆弧和滑块的厚度更改为原来的 4px 或一般的任何其他厚度？ @Vepthy 是的，你可以，你必须使用掩码大小和其他值。将尝试编辑以显示如何完成，但您可以开始使用该值，您会理解 另外，如果我要降低刻度或使它们和滑块之间的间隙更大，我应该用弯曲的刻度控制什么以获得相同的空间？这是我一直在尝试的。 CodePen 我尝试将滑块的高度从 50px 降低到 4px 并调整其范围，但它只是消失在刻度后面。 @Vepthy 不，就像更改高度一样简单，您需要更改蒙版内的很多值，高度需要保持不变。对于间隙，例如添加刻度`top：-2px;`并使用它来控制间隙以上是关于使用曲线将输入范围弧形拇指连接到滑块的主要内容，如果未能解决你的问题，请参考以下文章