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How to move a image smoothly with javascript?

I want to make an image move with a while loop in javascript but it isn’t working.

This is the javascript code:

var i = 0;

while(i != 1000){
  document.getElementById("poza").style.left= i;
  i = i + 20;
}

The css code:

#poza{
    position: absolute;
    left: 0px;
    width: 500px;
    height: auto;
}

And the html:

<!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>

    <link rel="stylesheet" href="index.css">
    
</head>
<body>
    
 <img id="poza" src="ali_si_david_camp.jpg" alt="ali_si_david_camp">

 <script src="index.js"></script>
</body>
</html>

Answer

You can try this approach as well.

var i = 0;
var timer = setInterval(()=>{
  document.getElementById("poza").style.left= i+'px';
  i = i + 1
  if(i > 1000) {
    clearInterval(timer);
  }
}, 30)
#poza{
    position: absolute;
    left: 0px;
    width: 500px;
    height: auto;
}
<!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>

    <link rel="stylesheet" href="index.css">
    
</head>
<body>
    
 <img id="poza" src="https://s.imgur.com/images/logo-1200-630.jpg?2" alt="ali_si_david_camp">

 <script src="index.js"></script>
</body>
</html>
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