JavaScript函数:计数器应每秒递增计数,计数器应在达到给定数字后停止

时间:2017-11-02 01:18:01

标签: javascript jquery html

我正在尝试编写JavaScript函数,其中计数器应该每秒递增计数,并且一旦计数器在onClick()之后达到输入字段中的给定数字就应该停止。此外,当计数器可被3整除时,我想突出显示box1。当计数器可被5整除时,突出显示Box2。

JavaScript的:

$(document).ready(function () {
  var number = parseInt($('#test').text(), 10) || 0; // Get the number from paragraph
  // Called the function in each second
  var interval = setInterval(function () {
      $('#test').text(number++); // Update the value in paragraph

      if (number > 5) {
          clearInterval(interval); // If exceeded 100, clear interval
      }
  }, 1000); // Run for each second
});

HTML:

<form>
  Enter the Number <br>
  <input type="number" placeholder="Number" value="input" id="text">
  <button type="button" value="Submit" id="tmsec"></button>
  <p id="test"></p>
</form>

<div>
<div class="box">
  <p>Finger</p>
</div>
<div class="box">
  <p>Toes</p>
</div>
</div>
<button type="button"> Reset </button>
<button type="button"> Restart </button>

1 个答案:

答案 0 :(得分:0)

我会这样做:

var MAX = 999;

$(document).ready(function () {
  var number = parseInt($('#test').text(), 10) || 0;
  var interval = setInterval(function () {
      number++;

      var max = $('#text').val() || MAX;
      $('#box1').css('background-color', number % 3 === 0 ? 'red' : '');
      $('#box2').css('background-color', number % 5 === 0 ? 'red' : '');
      $('#test').text(number);

      if (number >= max) {
          clearInterval(interval);
      }
  }, 1000);

  $('#test').text(number);
});

我还在框中添加了id:

<div class="box" id="box1">
  <p>Finger</p>
</div>
<div class="box" id="box2">
  <p>Toes</p>
</div>