Need to swiftly modify values of css attributes?

Question

Need to swiftly modify values of css attributes?

Here is a snippet of the code I am working with:

<div></div>
<button>
Go
</button>

div {
  width: 50px;
  height: 50px;
  border: 1px solid #ccc;
}

var bgs = ['red', 'blue', 'yellow', 'green', 'black'];
$('button').click(function() {
    for (var i = 0; i < bgs.length; i++) {
    $('div').css('background-color', bgs[i]);
  }
});

https://jsfiddle.net/e4jhwtyc/2/

I intend for the background color to quickly cycle through red, blue, yellow, green, and black whenever the Go button is clicked. However, all I see is the black color when the button is clicked. Can you spot what may be missing?

javascript jquery css

Answer 1

Answer №1

To observe a change in color, it is important to introduce a timeout as the transition may occur too swiftly otherwise.

var colors = ['red', 'blue', 'yellow', 'green', 'black'];
$('button').click(function() {
    for (var i = 0; i < colors.length; i++) {
    setTimeout(function(){
      $('div').css('background-color','').css('background-color', colors[i]);
    }, 1000);
  }
});

Answer 2

To observe a change in color, it is important to introduce a timeout as the transition may occur too swiftly otherwise.

var colors = ['red', 'blue', 'yellow', 'green', 'black'];
$('button').click(function() {
    for (var i = 0; i < colors.length; i++) {
    setTimeout(function(){
      $('div').css('background-color','').css('background-color', colors[i]);
    }, 1000);
  }
});

Answer 3

Answer №2

To introduce a gradual change in color over time (e.g., every 0.3 seconds) instead of an instant change, you can utilize the setInterval() function. Once the array's last element is reached, use clearInterval() to stop the interval and reset the counter i.

var colors = ['red', 'blue', 'yellow', 'green', 'black'];

var i = 0;
$('button').click(function() {
  var x = setInterval(function() {
    if (i < colors.length) {
      $('div').css('background-color', colors[i++]);
    } else {
      clearInterval(x);
      i = 0;
    }
  }, 300)
});

div {
  width: 50px;
  height: 50px;
  border: 1px solid #ccc;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div></div>
<button>
  Go
</button>

Answer 4

To introduce a gradual change in color over time (e.g., every 0.3 seconds) instead of an instant change, you can utilize the setInterval() function. Once the array's last element is reached, use clearInterval() to stop the interval and reset the counter i.

var colors = ['red', 'blue', 'yellow', 'green', 'black'];

var i = 0;
$('button').click(function() {
  var x = setInterval(function() {
    if (i < colors.length) {
      $('div').css('background-color', colors[i++]);
    } else {
      clearInterval(x);
      i = 0;
    }
  }, 300)
});

div {
  width: 50px;
  height: 50px;
  border: 1px solid #ccc;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div></div>
<button>
  Go
</button>

Answer 5

Answer №3

Whenever a click event occurs, the text changes to black. It happens so quickly that only black is displayed because the browser can't keep up with rendering all the colors. To fix this issue, use the setTimeout() function with varying offsets for each color.

Answer 6

Whenever a click event occurs, the text changes to black. It happens so quickly that only black is displayed because the browser can't keep up with rendering all the colors. To fix this issue, use the setTimeout() function with varying offsets for each color.

Answer 7

Answer №4

This updated version omits the use of "setTimeout" and "setInterval"

var backgrounds = ['red', 'blue', 'yellow', 'green', 'black'];
function *getBackgrounds(){
  for(let value of backgrounds) {
    yield value;
  }
}

$('button').click(function() {
  let iterator = getBackgrounds();
  let $div = $('div');
  var delay = 150;
  var previous = 0;
  (function changeColor(){
    requestAnimationFrame(function(time){
      if(previous && time - previous < delay) {
        return changeColor();
      }
      previous = time;
      let nextValue = iterator.next();
      if(nextValue.done) return;
      $div.css('background-color', nextValue.value);
      changeColor();
    });
  })();
  
});

div {
  width: 50px;
  height: 50px;
  border: 1px solid #ccc;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div></div>
<button>
  Go
</button>

Answer 8

This updated version omits the use of "setTimeout" and "setInterval"

var backgrounds = ['red', 'blue', 'yellow', 'green', 'black'];
function *getBackgrounds(){
  for(let value of backgrounds) {
    yield value;
  }
}

$('button').click(function() {
  let iterator = getBackgrounds();
  let $div = $('div');
  var delay = 150;
  var previous = 0;
  (function changeColor(){
    requestAnimationFrame(function(time){
      if(previous && time - previous < delay) {
        return changeColor();
      }
      previous = time;
      let nextValue = iterator.next();
      if(nextValue.done) return;
      $div.css('background-color', nextValue.value);
      changeColor();
    });
  })();
  
});

div {
  width: 50px;
  height: 50px;
  border: 1px solid #ccc;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div></div>
<button>
  Go
</button>

Need to swiftly modify values of css attributes?

Answer №1

Answer №2

Answer №3

Answer №4

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