What steps can I take to create a bar that animates in just 1 second using HTML, CSS, and JavaScript?

Question

What steps can I take to create a bar that animates in just 1 second using HTML, CSS, and JavaScript?

I'm currently working on a custom progress bar in Javascript that updates every second and then resets.

I attempted to use setInterval() to change the value, but I couldn't get it to work.

Any assistance would be greatly appreciated, thank you!

Below is my code snippet:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .progress {
            position: relative;
            width: 510px;
            height: 60px;
            background: #9cbab4;
            overflow: hidden;
          
        }
        .progress__fill {
            width: 0%;
            height: 100%;
            background: #009579;
            transition: all 0.1s;
        }

        .progress__text{
            position: absolute;
            top: 50%;
            right: 5px;
            transform: translateY(-50%);
            font: bold 20px 'Quicksand', sans-serif;
            color: #ffffff;
        }
    </style>
</head>
<body>
    <div class="progress">
        <div class="progress__fill"></div>
        <span class="progress__text">0%</span>
    </div>
    <script>
        setInterval(function(){
            value++;
        }, 1000);
        function updateProgressBar(ProgressBar, value){
            ProgressBar.querySelector(".progress__fill").style.width = '${value}%'
            ProgressBar.querySelector(".progress__text").textContent = '${value}%'
        }
    </script>
</body>
</html>

javascript html css progress-bar setinterval

Answer 1

Answer №1

Trying to replicate your code, I transformed the progress, progress__fill, and progress__text into ids and changed the

<div class="__" />

to <div id="__" />:

<style>
    #progress {
        position: relative;
        width: 510px;
        height: 60px;
        background: #9cbab4;
        overflow: hidden;
      
    }
    #progress_fill {
        width: 0%;
        height: 100%;
        background: #009579;
        transition: all 0.1s;
    }

    #progress_text{
        position: absolute;
        top: 50%;
        right: 5px;
        transform: translateY(-50%);
        font: bold 20px 'Quicksand', sans-serif;
        color: #ffffff;
    }
</style>

This is how the <div /> looks in my reproduction:

<div id="progress">
    <div id="progress_fill"></div>
    <span id="progress_text">0%</span>
</div>

In the <script>, there was no variable for value so I added one and initialized it as zero: let value = 0; then appended it with '%'.

I utilized window.setInterval and replaced the querySelector with document.getElementById due to the aforementioned modifications.

Here's what the script tag now looks like:

<script>
 let value = 0;
 window.setInterval(function() {
   if (value != 100) {
     value++;
     document.getElementById("progress_fill").style.width = value + '%';
     document.getElementById("progress_text").textContent = value + '%';
   }
 }, 1000);  
</script>

I added an if (value != 100) statement to halt the process when it reaches 100.

Hopefully, this explanation is beneficial! Below is a link to my code snippet for reference: https://jsbin.com/xiwiyew/5/edit?html

Answer 2

Trying to replicate your code, I transformed the progress, progress__fill, and progress__text into ids and changed the

<div class="__" />

to <div id="__" />:

<style>
    #progress {
        position: relative;
        width: 510px;
        height: 60px;
        background: #9cbab4;
        overflow: hidden;
      
    }
    #progress_fill {
        width: 0%;
        height: 100%;
        background: #009579;
        transition: all 0.1s;
    }

    #progress_text{
        position: absolute;
        top: 50%;
        right: 5px;
        transform: translateY(-50%);
        font: bold 20px 'Quicksand', sans-serif;
        color: #ffffff;
    }
</style>

This is how the <div /> looks in my reproduction:

<div id="progress">
    <div id="progress_fill"></div>
    <span id="progress_text">0%</span>
</div>

In the <script>, there was no variable for value so I added one and initialized it as zero: let value = 0; then appended it with '%'.

I utilized window.setInterval and replaced the querySelector with document.getElementById due to the aforementioned modifications.

Here's what the script tag now looks like:

<script>
 let value = 0;
 window.setInterval(function() {
   if (value != 100) {
     value++;
     document.getElementById("progress_fill").style.width = value + '%';
     document.getElementById("progress_text").textContent = value + '%';
   }
 }, 1000);  
</script>

I added an if (value != 100) statement to halt the process when it reaches 100.

Hopefully, this explanation is beneficial! Below is a link to my code snippet for reference: https://jsbin.com/xiwiyew/5/edit?html

Answer 3

Answer №2

After studying your example, I decided to make some adjustments and experiment a little with the code. The main issue was that you forgot to call the updateProgressBar() function within your interval, causing it not to work properly. The revised code should be self-explanatory. Feel free to reach out if you have any questions.

Here is my updated code. You can also choose to include the two lines within the update function and move them directly into the interval function. Additionally, the function no longer has a limit and will continue beyond 100% if left unchecked for long enough. I hope this clarifies things for you.

        value = 0;
        setInterval(function() {
            value++;
            updateProgressBar(value);
        }, 1000);

        function updateProgressBar(value) {
            document.querySelector(".progress__fill").style.width = value + "%"
            document.querySelector(".progress__text").innerHTML = value + "%"
        }

Based on your code, it seems like you may be new to coding. My advice would be to write out or describe what you want in plain language first, and then try to translate that into your code. For instance, specify that you want a progress bar with an incrementing value every second (handled by the interval function). Breaking down complex logic into separate functions can also improve readability and ease of understanding.

Answer 4

After studying your example, I decided to make some adjustments and experiment a little with the code. The main issue was that you forgot to call the updateProgressBar() function within your interval, causing it not to work properly. The revised code should be self-explanatory. Feel free to reach out if you have any questions.

Here is my updated code. You can also choose to include the two lines within the update function and move them directly into the interval function. Additionally, the function no longer has a limit and will continue beyond 100% if left unchecked for long enough. I hope this clarifies things for you.

        value = 0;
        setInterval(function() {
            value++;
            updateProgressBar(value);
        }, 1000);

        function updateProgressBar(value) {
            document.querySelector(".progress__fill").style.width = value + "%"
            document.querySelector(".progress__text").innerHTML = value + "%"
        }

Based on your code, it seems like you may be new to coding. My advice would be to write out or describe what you want in plain language first, and then try to translate that into your code. For instance, specify that you want a progress bar with an incrementing value every second (handled by the interval function). Breaking down complex logic into separate functions can also improve readability and ease of understanding.

Answer 5

Answer №3

To begin with, it's important to recognize that variables are bound by scope limitations, meaning you can extract the value from your innerHTML and update it in each function call. This approach allows you to obtain real-time values without the need for global storage.

Below is a functional code snippet demonstrating this concept:

setInterval(function () {
  const progress__text = document.querySelector(".progress__text");
  const progress__fill = document.querySelector(".progress__fill");
  if (progress__text && progress__fill) {
    let value = parseInt(progress__text.innerHTML.split("%")[0]);
    if (value === 100) {
      progress__fill.style.width = "0%";
      progress__text.innerHTML = "0%";
    } else {
      progress__fill.style.width = ++value + "%";
      progress__text.innerHTML = ++value + "%";
    }
  }
}, 100);

.progress {
  position: relative;
  width: 510px;
  height: 60px;
  background: #9cbab4;
  overflow: hidden;
}

.progress__fill {
  width: 0%;
  height: 100%;
  background: #009579;
  transition: all 0.1s;
}

.progress__text {
  position: absolute;
  top: 50%;
  right: 5px;
  transform: translateY(-50%);
  font: bold 20px "Quicksand", sans-serif;
  color: #ffffff;
}

<body>
  <div class="progress">
    <div class="progress__fill"></div>
    <span value="0" class="progress__text">0%</span>
  </div>

</body>

Answer 6

To begin with, it's important to recognize that variables are bound by scope limitations, meaning you can extract the value from your innerHTML and update it in each function call. This approach allows you to obtain real-time values without the need for global storage.

Below is a functional code snippet demonstrating this concept:

setInterval(function () {
  const progress__text = document.querySelector(".progress__text");
  const progress__fill = document.querySelector(".progress__fill");
  if (progress__text && progress__fill) {
    let value = parseInt(progress__text.innerHTML.split("%")[0]);
    if (value === 100) {
      progress__fill.style.width = "0%";
      progress__text.innerHTML = "0%";
    } else {
      progress__fill.style.width = ++value + "%";
      progress__text.innerHTML = ++value + "%";
    }
  }
}, 100);

.progress {
  position: relative;
  width: 510px;
  height: 60px;
  background: #9cbab4;
  overflow: hidden;
}

.progress__fill {
  width: 0%;
  height: 100%;
  background: #009579;
  transition: all 0.1s;
}

.progress__text {
  position: absolute;
  top: 50%;
  right: 5px;
  transform: translateY(-50%);
  font: bold 20px "Quicksand", sans-serif;
  color: #ffffff;
}

<body>
  <div class="progress">
    <div class="progress__fill"></div>
    <span value="0" class="progress__text">0%</span>
  </div>

</body>

Answer 7

Answer №4

This method may not provide precise timing for animations, but it is straightforward to implement

const animation = {
  duration: 2, // length of animation in seconds
  steps: 60,
  counter: 0,
  incrementCounter() {
    this.counter += ((1 / this.duration) * (this.steps / 1000) * 100);
    this.counter = Math.min(this.counter, 100)
  }
}

const draw = setInterval(updateAnimation, animation.steps);

function updateAnimation() {
  animation.incrementCounter();
  document.querySelector(".progress__fill").style.width = animation.counter + '%'
  document.querySelector(".progress__text").textContent = animation.counter + '%'
  if (animation.counter === 100) {
    animation.counter = 0;
    clearInterval(draw)
  };
}

.progress {
  position: relative;
  width: 510px;
  height: 60px;
  background: #9cbab4;
  overflow: hidden;
}

.progress__fill {
  width: 0%;
  height: 100%;
  background: #009579;
  transition: all 0.1s;
}

.progress__text {
  position: absolute;
  top: 50%;
  right: 5px;
  transform: translateY(-50%);
  font: bold 20px 'Quicksand', sans-serif;
  color: #ffffff;
}

<div class="progress">
  <div class="progress__fill"></div>
  <span class="progress__text">0%</span>
</div>

Answer 8

This method may not provide precise timing for animations, but it is straightforward to implement

const animation = {
  duration: 2, // length of animation in seconds
  steps: 60,
  counter: 0,
  incrementCounter() {
    this.counter += ((1 / this.duration) * (this.steps / 1000) * 100);
    this.counter = Math.min(this.counter, 100)
  }
}

const draw = setInterval(updateAnimation, animation.steps);

function updateAnimation() {
  animation.incrementCounter();
  document.querySelector(".progress__fill").style.width = animation.counter + '%'
  document.querySelector(".progress__text").textContent = animation.counter + '%'
  if (animation.counter === 100) {
    animation.counter = 0;
    clearInterval(draw)
  };
}

.progress {
  position: relative;
  width: 510px;
  height: 60px;
  background: #9cbab4;
  overflow: hidden;
}

.progress__fill {
  width: 0%;
  height: 100%;
  background: #009579;
  transition: all 0.1s;
}

.progress__text {
  position: absolute;
  top: 50%;
  right: 5px;
  transform: translateY(-50%);
  font: bold 20px 'Quicksand', sans-serif;
  color: #ffffff;
}

<div class="progress">
  <div class="progress__fill"></div>
  <span class="progress__text">0%</span>
</div>

What steps can I take to create a bar that animates in just 1 second using HTML, CSS, and JavaScript?

Answer №1

Answer №2

Answer №3

Answer №4

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