Progress Step Form | Html Css And JavaScript

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HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>CodeAtNow - Progress Step Form</title>
  <link rel="stylesheet" href="./style.css">

</head>
<body>
<!-- partial:index.partial.html -->
<div class="container">
  <div class="progress-wrapper">
    <div class="progress" id="progress"></div>
    <div class="circle active">1</div>
    <div class="circle">2</div>
    <div class="circle">3</div>
    <div class="circle">4</div>
  </div>
  <button class="btn" id="prev" disabled>Prev</button><button class="btn" id="next">Next</button>
</div>
<!-- partial -->
  <script  src="./script.js"></script>

</body>
</html>

CSS

body {
  font-family: "Inter", sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  align-items: center;
  justify-content: center;
  margin: 0;
  background: #fefefe;
}
* {
  box-sizing: border-box;
}
:root {
  --progress-bar__empty: #eee;
  --progress-bar__fill: #6c5ce7;
}
.container {
  text-align: center;
}
.progress-wrapper {
  display: flex;
  position: relative;
  justify-content: space-between;
  width: 50vw;
  max-width: 100%;
  margin-bottom: 20px;
}
.progress-wrapper::before {
  content: "";
  width: 100%;
  background: #eee;
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  transform: translatey(-50%);
  z-index: -1;
}
.progress {
  position: absolute;
  background-color: var(--progress-bar__fill);
  width: 0;
  top: 50%;
  left: 0;
  height: 4px;
  z-index: -1;
  transform: translatey(-50%);
  transition: 0.2s linear;
}
.circle {
  color: #999;
  background-color: #fff;
  border-radius: 50%;
  height: 30px;
  width: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--progress-bar__empty);
  transition: 0.4s ease;
}
.circle.active {
  border: 3px solid var(--progress-bar__fill);
}
.btn {
  background-color: var(--progress-bar__fill);
  color: #fff;
  font-family: inherit;
  border: 0;
  border-radius: 6px;
  padding: 8px 30px;
  font-size: 14px;
  margin: 8px;
}
.btn:active {
  transform: scale(0.95);
}
.btn:disabled {
  background-color: var(--progress-bar__empty);
  cursor: not-allowed;
}
.btn:focus {
  outline: 0;
}

const next = document.getElementById("next");
const prev = document.getElementById("prev");
const progress = document.getElementById("progress");
const steps = document.getElementsByClassName("circle");

let activeIndex = 0;
const setActive = (toggle, index) => {
  progress.style.width = `${(toggle ? index : index - 1) * (100 / 3)}%`;
  steps[index].classList.toggle("active", toggle);
};
next.addEventListener("click", () => {
  activeIndex += 1;
  setActive(true, activeIndex);
  prev.disabled = false;
  if (activeIndex === steps.length - 1) {
    next.disabled = true;
  }
});
prev.addEventListener("click", () => {
  next.disabled = false;
  setActive(false, activeIndex);
  activeIndex -= 1;
  if (activeIndex === 0) {
    prev.disabled = true;
  }
});