All timers work in the same way, although each timer has its own time. what's the bug?

G

Gaida7772017-09-26 09:43:35

JavaScript

Gaida777, 2017-09-26 09:43:35

I made 4 canvases in which figures should be drawn, each on its own timer, but they all work at the same time. Help me sort this out. thank.

<body >
  <ul class="tabs_menu">
    <li class="tabs_menu__item active"><div class="btn_1" ></div></li>
    <li class="tabs_menu__item"><div class="btn_2"></div></li>
    <li class="tabs_menu__item"><div class="btn_3"></div></li>
    <li class="tabs_menu__item"><div class="btn_4"></div></li>
    <li class="tabs_menu__item"><div class="btn_5"></div></li>
          
          
  </ul>
  <div class="tabs">
    <div class="info active">
      <div class="speed__info">on <br>20 Мбит</div>
      <div class="canvas__wrapper">
        <div class="canvas__text">Индикатор загрузки</div>
        <canvas class="canvas_1" width="120" height="120"></canvas>
        <div class="canvas__percent_1"></div>
      </div>
    </div>
    <div class="info">
      <div class="speed__info">on <br>100 Мбит</div>
      <div class="canvas__wrapper">
        <div class="canvas__text">Индикатор загрузки</div>
        <canvas class="canvas_2" width="120" height="120"></canvas>
        <div class="canvas__percent_2"></div>
      </div>
    </div>
    <div class="info">
      <div class="speed__info">on <br>400 Мбит</div>
      <div class="canvas__wrapper">
        <div class="canvas__text">Индикатор загрузки</div>
        <canvas class="canvas_3" width="120" height="120"></canvas>
        <div class="canvas__percent_3"></div>
      </div>
    </div>
    <div class="info">
      <div class="speed__info">on <br>1000 Мбит</div>
      <div class="canvas__wrapper">
        <div class="canvas__text">Индикатор загрузки</div>
        <canvas class="canvas_4" width="120" height="120"></canvas>
        <div class="canvas__percent_4"></div>
      </div>
    </div>

  </div>


  
  
  <style>

  .canvas{
    
    background: #fff;
  }
  .btn_1,
  .btn_2,
  .btn_3,
  .btn_4,
  .btn_5{
    width: 100px;
    height: 50px;
    background: red;
  }
  .btn_1{
    background: red;
  }
  .btn_2{
    background: yellow;
  }
  .btn_3{
    background: green;
  }
  .btn_4{
    background: blue;
  }
  .btn_5{
    background: purple;
  }
  .tabs_menu{
    width: 154px;
    float: left;
  }
  .tabs_menu__item{
    list-style: none;
    margin-bottom: 10px;
  }
  .tabs_menu .tabs_menu__item:last-child{
    margin-bottom: 0;
  }
  .tabs{
    width: 83%;
    float: right;
  }
  .info{
    width: 20.6%;
    margin-right: 0.2%;
    
    height: 200px;
    float: left;
  }
  .tabs .info:last-child{
    margin-right: 0;
  }

  .speed__info{
    text-align: center;
    height: 80px;
    padding-top: 20px;
    background: #ccc;
  }

  .canvas__wrapper{
    height: 280px;
    position: relative;
    margin-top: 10px;
    background: #ccc;
  }
  .canvas_1,
  .canvas_2,
  .canvas_3,
  .canvas_4{
    position: absolute;
    top: 40px;
    left: 55px;

  }
  .canvas__text{
    text-align: center;
  }
  .canvas__percent_1,
  .canvas__percent_2,
  .canvas__percent_3,
  .canvas__percent_4{
    position: absolute;
    top: 75px;
    left: 94px;
    text-align: center;
    width: 45px;
  }
  </style>
  <script>
  var btn_1 = document.querySelector('.btn_1');
  var canvas_1 = document.querySelector('.canvas_1');
  var context_1 = canvas_1.getContext('2d');
  var centerX_1 = canvas_1.width / 2;
  var canvas__percent_1 = document.querySelector('.canvas__percent_1')
      var centerY_1 = canvas_1.height / 2;
      var radius = 50;

    var btn_2 = document.querySelector('.btn_2');
  var canvas_2 = document.querySelector('.canvas_2');
  var context_2 = canvas_2.getContext('2d');
  var centerX_2 = canvas_2.width / 2;
  var canvas__percent_2 = document.querySelector('.canvas__percent_2')
      var centerY_2 = canvas_2.height / 2;
      
      
      var btn_3 = document.querySelector('.btn_3');
  var canvas_3 = document.querySelector('.canvas_3');
  var context_3 = canvas_3.getContext('2d');
  var centerX_3 = canvas_3.width / 2;
  var canvas__percent_3 = document.querySelector('.canvas__percent_3')
      var centerY_3 = canvas_3.height / 2;
      

      var btn_4 = document.querySelector('.btn_4');
  var canvas_4 = document.querySelector('.canvas_4');
  var context_4 = canvas_4.getContext('2d');
  var centerX_4 = canvas_4.width / 2;
  var canvas__percent_4 = document.querySelector('.canvas__percent_4')
      var centerY_4 = canvas_4.height / 2;
      
      
      function getRadians(degrees) {
  return (Math.PI/180)*degrees;
}
  
var degrees = 0;
function foo(){
    setInterval(function(){

      if(degrees<=360){
      context_1.beginPath();
      context_1.arc(centerX_1, centerY_1, radius, 0, getRadians(degrees), false);
      context_1.lineWidth = 9;
      context_1.fill
      context_1.strokeStyle = '#005500';
      context_1.stroke();
     
      canvas__percent_1.innerHTML = Math.floor(degrees/360*100) + "%";
  		}
       
      },
      10);
    
  context_1.clearRect(0, 0, canvas_1.width, canvas_1.height);
  
  

    var set_1 = setInterval(function (){
      if(degrees<=360){
      context_2.beginPath();
      context_2.arc(centerX_2, centerY_2, radius, 0, getRadians(degrees), false);
      context_2.lineWidth = 8;
      context_2.fill
      context_2.strokeStyle = '#006780';
      context_2.stroke();
      
      canvas__percent_2.innerHTML = Math.floor(degrees/360*100) + "%";
  		}
     	else{
     		clearInterval(set_1);
     	}
      },
      20);
  context_2.clearRect(0, 0, canvas_2.width, canvas_2.height);

 
    setInterval(function (){
      if(degrees<=360){
      context_3.beginPath();
      context_3.arc(centerX_3, centerY_3, radius, 0, getRadians(degrees), false);
      context_3.lineWidth = 5;
      context_3.fill
      context_3.strokeStyle = '#024500';
      context_3.stroke();
     
      canvas__percent_3.innerHTML = Math.floor(degrees/360*100) + "%";
  		}
      
      },
     30);
    
  context_3.clearRect(0, 0, canvas_3.width, canvas_3.height);


  setInterval(function (){
      if(degrees<=360){
      context_4.beginPath();
      context_4.arc(centerX_4, centerY_4, radius, 0, getRadians(degrees), false);
      context_4.lineWidth = 2;
      context_4.fill
      context_4.strokeStyle = '#066770';
      context_4.stroke();
      ;
      canvas__percent_4.innerHTML = Math.floor(degrees/360*100) + "%";
  		}
      degrees+= 1;
      },
      40);
  
  context_4.clearRect(0, 0, canvas_4.width, canvas_4.height);

degrees= 0;
  
}

   btn_1.addEventListener("click", foo);

  
  </script>

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2 answer(s)

0

0xD34F, 2017-09-26
@Gaida777

You have one degree variable for everyone. Naturally, everything is drawn the same way.

A

Andrey Sanych, 2017-09-26
@mountpoint

probably because you set a very small value for the timer = 10 to 40 milliseconds. You just can't notice different startup times, try increasing the values to 1000, 2000, 3000 and 4000. And see how it works