react-slider实现彩色可拖动滑块

先说明下需求：-UI设计如图（需要实现的效果）：可拖动滑块，对应百分比，以及对应css宽度。

 实现步骤：

第一步：npm下载安装react-slider： npm install --save rc-slider

第二步：组件页面引入：

import Slider, { Range } from "rc-slider";
import "rc-slider/assets/index.css";

第三步：关键代码：

import { useState, useEffect } from "react";
import Slider, { Range } from "rc-slider";
import "rc-slider/assets/index.css";

// 实现两端固定，中间3个点可拖动，需将中间三个点的值可控，两端的值用value写死
const [sValue, setSValue] = useState(40);
const [sValue1, setSValue1] = useState(60);
const [sValue2, setSValue2] = useState(80);

// 对应百分比 列表
const [percentList, setPercentList] = useState([40, 20, 20, 20]);

// 滑动滑块触发
const onSliderChange = (value: any) => {
    for (let i = 0; i < value.length; i++) {
      setSValue(value[1]);
      setSValue1(value[2]);
      setSValue2(value[3]);
    }
    addPercent(value);
};

  // 计算滑块百分比
  const addPercent = (value: any) => {
    let opt: any = [];
    for (let i = 0; i < value.length; i++) {
      opt.push(
        value[1],
        value[2] - value[1],
        value[3] - value[2],
        value[4] - value[3]
      );
    }
    setPercentList(opt.slice(16, 20));
    return opt.slice(16, 20);
  };

return (
    <div className="color-progress">
        // 显示百分比
        <div className="color-slider-contain">
            {percentList.map((v, k) => {
              return (
                <div
                  className="color-slider-label"
                  key={k}
                  style={{ width: v + "%" }}
                >
                  {v}%
                </div>
              );
            })}
          </div>

        // 显示彩色滑块
        <Range
            count={3}
            defaultValue={[0, 40, 50, 60, 100]}
            value={[0, sValue, sValue1, sValue2, 100]}
            pushable
            trackStyle={[
              { backgroundColor: "#4368ec" },
              { backgroundColor: "#49c8ed" },
              { backgroundColor: "#eea844" },
              { backgroundColor: "#eee044" },
            ]}
            handleStyle={[
              { backgroundColor: "#4368ec" },
              { backgroundColor: "#4368ec" },
              { backgroundColor: "#49c8ed" },
              { backgroundColor: "#eea844" },
              { backgroundColor: "#eee044" },
            ]}
            railStyle={{ backgroundColor: "#0c0d30" }}
            onChange={onSliderChange}
          />       
    </div>
)

// css
 .color-progress {
      width: 41vw;
      margin-left: 2vw;
      height: 10vh;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      .rc-slider {
        margin: 0.7vh 0 1vh;
      }
      .rc-slider-track {
        height: 8px;
      }
      .rc-slider-handle {
        width: 18px;
        height: 18px;
        border: 2px solid #ffffff;
      }
      .color-slider-contain {
        width: 100%;
        height: 2.5vh;
        color: #d9d9d9;
        display: flex;
        .color-slider-label {
          color: #d9d9d9;
          text-align: center;
        }
      }
    }