Using customized bootstrap styles can sometimes conflict with other bootstrap styles that are not customized, for example this could happen if you have a frame and you are loading a web component inside of it inside a page.
Possible solution to avoid conflicts is to namespace twitter bootstrap
Lets take example html with bootstrap styling
<html>
<head>
<title>My Twitter Bootstrap example</title>
<link rel="stylesheet" href="bootstrap.css">
</head>
<body>
<ul class="nav nav-pills" role="tablist">
<li role="presentation" class="active"><a href="#">Home <span class="badge">42</span></a></li>
<li role="presentation"><a href="#">Profile</a></li>
<li role="presentation"><a href="#">Messages <span class="badge">3</span></a></li>
</ul>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
To namespace bootstrap styles:
Create a new less file, and paste the below inside. "mybt" below is the custom namespace i am using
.mybt {
@import "bootstrap-3.3.7/less/bootstrap";
}
After that compile this less file
lessc mybt.less mybt.css
And now after referencing mybt.css the html would use mybt and the bootstrap styles like below
<html>
<head>
<title>My Twitter Bootstrap example</title>
<link rel="stylesheet" href="mybt.css">
</head>
<body>
<ul class="mybt nav nav-pills" role="tablist">
<li role="presentation" class="mybt active"><a href="#">Home <span class="mybt badge">42</span></a></li>
<li role="presentation" class="mybt"><a href="#">Profile</a></li>
<li role="presentation" class="mybt"><a href="#">Messages <span class="mybt badge">3</span></a></li>
</ul>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
Another option is to extend bootstrap styles
to extend it, create new less file with below:
@import "bootstrap-3.3.7/less/bootstrap";
.my-nav:extend(.nav) {}
.my-nav-pills:extend(.nav-pills) {}
.my-badge:extend(.badge) {}
Extending will work if you have only few styles that you are using.
