问题
I'm trying to get an alert to disappear when the "x" button is clicked, but there seems to be something missing that's keeping it from working, not sure what it is.
<div class="alert alert-success alert-dismissible">
<button type = "button" class="close" data-dismiss = "alert">x</button>
You've done it!
</div>
回答1:
for dismissible to work, you need to include jQuery and bootstrap.js in your document.
<!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">
<title>Bootstrap 101 Template</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<body>
<div class="alert alert-success alert-dismissible">
<button type = "button" class="close" data-dismiss = "alert">x</button>
You've done it!
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</body>
</html>
来源：https://stackoverflow.com/questions/43308367/dismissable-alert