프론트엔드/컴포넌트

로딩 애니메이션

syleemomo 2023. 7. 5. 21:21
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<!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>자바스크립트 연습</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div id="box-container">
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
        <div class="box"></div>
    </div>
    <script src='app.js'></script>
</body>
</html>
body{
    margin: 0;
    padding: 0;
    text-align: center;
}
#box-container{
    width: 100%;
    height: 100vh;
    background-color: lightsalmon;

    display: flex;
    justify-content: center;
    align-items: center;
}
.box{
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: lightpink;
    transition: all 0.5s;
    margin-left: 20px;
    user-select: none;
}
const boxes = document.querySelectorAll('.box')

let index = 0, prevIndex = 0
let flag = true  
function changePosition(){
  console.log(index)
  boxes[prevIndex].style.marginTop = '0px'
  boxes[index].style.marginTop = '-30px'

  
  if(index >= 4 || index <= 0){
    flag = !flag
  }
  
  prevIndex = index 
  
  if(!flag) index++
  else index--

  
}

setInterval(changePosition, 200)
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