jsは環状プログレスバーとパーセンテージバーを描きます.

  
  
  



  

    
      
        canvas
    
  
  

    
      
        canvas
    
  



  /**
   *   
   * @param {number} cx x  
   * @param {number} cy y  
   * @param {number} r    
   * @param {number} lineWidth     
   * @return null
   */
  function circle(ctx, cx, cy, r, lineWidth) {
    if (!ctx) return
    ctx.beginPath();
    ctx.lineWidth = lineWidth;
    ctx.strokeStyle = '#eee';
    ctx.arc(cx, cy, r, 0, (Math.PI * 2), true);
    ctx.stroke();
  }

  /**
    *    
    * @param {number} cx x  
    * @param {number} cy y  
    * @param {number} r    
    * @param {number} lineWidth     
    * @param {number} startAngle        360 
    * @param {number} endAngle        360 
    * @return null
    */
  function sector(ctx, cx, cy, r, lineWidth, startAngle = 0, endAngle = 360) {
    if (!ctx) return
    ctx.beginPath();
    ctx.lineWidth = lineWidth;

    //    
    let linGrad = ctx.createLinearGradient(
      cx - r - lineWidth, cy, cx + r + lineWidth, cy
    );
    linGrad.addColorStop(0.0, '#ffcc99');
    linGrad.addColorStop(0.5, '#99ff66');
    linGrad.addColorStop(1.0, '#66ccff');
    ctx.strokeStyle = linGrad;

    //   
    // ctx.strokeStyle = 'red';

    //       
    ctx.lineCap = 'round';

    //  
    const _startAng = Math.PI * ((startAngle - 90) / 180)
    const _endAng = Math.PI * ((endAngle - 90) / 180)
    ctx.arc(
      cx, cy, r,
      _startAng,
      _endAng,
      false
    );
    ctx.stroke();
  }

  /**
    *      
    * @param {number} cx x  
    * @param {number} cy y  
    * @param {number} r    
    * @param {number} lineWidth     
    * @param {number} process     
    * @return null
    */
  function freshProgress(ctx, cx, cy, r, lineWidth, process) {

    if (!ctx) return

    //  canvas  
    ctx.clearRect(0, 0, cx * 2, cy * 2);

    //    
    ctx.textAlign = 'center';
    ctx.textBaseline = 'middle';
    ctx.fillStyle = '#999';
    ctx.fillText(parseFloat(process).toFixed(0) + '%', cx, cy);

    //  
    circle(ctx, cx, cy, r, lineWidth);

    //  
    sector(ctx, cx, cy, r, lineWidth, 0, process * 3.6);
  }

  /**
    *           
    * @param {string} id canvas    id
    * @param {number} progress      100    
    * @param {number} time          p.s.            
    */
  function drawProgress(id, progress, time = 1) {
    const canvas = document.getElementById(id), // canvas   
      circleX = canvas.width / 2,  //  x  
      circleY = canvas.height / 2,  //  y  
      radius = 100, //    
      lineWidth = 20, //       
      delay = time / progress * 1000; //     

    const ctx = canvas.getContext("2d");
    let nowProgress = 0;  //    
    let circleLoading = window.setInterval(function () {
      if (nowProgress > progress) {
        clearInterval(circleLoading);
      } else {
        freshProgress(ctx, circleX, circleY, radius, lineWidth, nowProgress);
        nowProgress += 1.0;
      }

    }, delay);

  }
  /**
    *      
    * @param {number} cx x  
    * @param {number} cy y  
    * @param {number} r    
    * @param {number} lineWidth     
    * @param {array} data     number   
    * @param {number} process     
    * @return null
    */
  function freshPrecentage(ctx, cx, cy, r, lineWidth, data, process) {
    if (!ctx) return
    //  canvas  
    ctx.clearRect(0, 0, cx * 2, cy * 2);
    if (data.length) {
      const sum = data.reduce((prev, next) => prev + next)
      const space = data.length > 1 ? (data.length) * 15 : 0;
      let _startAng = 0
      const resmap = data.map(element => {
        const item = { startAngle: _startAng, endAngle: _startAng + element / sum * (360 - space), element, sum }
        if (process >= _startAng) {
          const endArg = Math.min(item.endAngle, process)
          sector(ctx, cx, cy, r, lineWidth, item.startAngle, endArg);
        }
        _startAng = item.endAngle + 15
        return item
      });
    }
  }

  /**
    *           
    * @param {string} id canvas    id
    * @param {array} data     number   
    * @param {number} time          p.s.            
    */
  function drawPercentage(id, data = [], time = 1) {
    const canvas = document.getElementById(id), // canvas   
      circleX = canvas.width / 2,  //  x  
      circleY = canvas.height / 2,  //  y  
      radius = 100, //    
      lineWidth = 20, //       
      delay = time * 10;
    const ctx = canvas.getContext("2d");
    console.log(delay)
    let nowProgress = 0;  //    
    let circleLoading = window.setInterval(function () {
      if (nowProgress > 100) {
        clearInterval(circleLoading);
      } else {
        freshPrecentage(ctx, circleX, circleY, radius, lineWidth, data, nowProgress * 3.6)
        nowProgress += 1.0;
      }

    }, delay);

  }

  //  
  drawProgress('cycCanvas', 80);
  drawPercentage('cycCanvas1', [1, 2, 3, 4]);