creating spinner or loader when loads webpage or any div or block , saving data state.
let us see small example,
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Colored Spinners</h2>
<p>Use any color utilites to add a color to the spinner:</p>
<div class="spinner-border text-muted"></div>
<div class="spinner-border text-primary"></div>
<div class="spinner-border text-success"></div>
<div class="spinner-border text-info"></div>
<div class="spinner-border text-warning"></div>
</div>
</body>
</html>
in above example first call bootstrap.min.js and bootstrap.min.css, then use spinner-border class as above declare
Application - this is useful when loading page, loading div, or button when submit
Notes - above files bootstrap.min.js and bootstrap.min.css are free to use.
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