Play with Bootstrap CSS

Goal

  • ⚡ Get used to Bootstrap CSS

Preparation

  1. Make bootstrap-test folder
  2. Inside it make bootstrap-test1.html
  3. Copy and paste bootstrap starter template.

https://getbootstrap.com/docs/4.5/getting-started/introduction/#starter-template

copy-bootstrap-starter-html

caution
  • Ignore Javascript files now.
  • After we learn javascript, I will explain about these files.
bootstrap-test/bootstrap-test1.html
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<h1>Hello, world!</h1>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"></script>
</body>
</html>

Check current output

copy-bootstrap-html-output

Try Bootstrap CSS

So, let's try bootstrap CSS.

First, please go to Components => Buttons page.

click-component-link

https://getbootstrap.com/docs/4.5/components/buttons/

Important🔥

In Bootstrap site, they show

  1. Output
  2. HTML code with classes (which is from Bootstrap CSS) that generates the output

⚠️ Read document carefully to know how to use !

Try Button

Use Case
  • You want to add "Sign Up" button
  1. Make "Sign Up" <a> tag HTML code
  2. Add btn btn-primary classes to Sign Up button.

copy-btn-class

The .btn classes are designed to be used with the <button> element. However, you can also use these classes on <a> or <input> elements (though some browsers may apply a slightly different rendering).

Ref: https://getbootstrap.com/docs/4.5/components/buttons/#button-tags

bootstrap-test/bootstrap-test1.html
<h1>
Hello, world!
<a href="#" class="btn btn-primary">Sign Up</a>
</h1>

Check the output...

bootstrap-btn

Outline buttons

bootstrap-test/bootstrap-test1.html
<h1>
Hello, world!
<a href="#" class="btn btn-outline-primary">Sign Up</a>
</h1>
Output

Change sizes of Button

bootstrap-test/bootstrap-test1.html
<h1>
Hello, world!
<a href="#" class="btn btn-outline-primary btn-lg">Sign Up</a>
</h1>
output

What is the merit?

Did you notice the merit of Bootstrap?

By using Bootstrap,

important
  • You don't need to write CSS 😁

In the next step, let's see another example of Bootstrap CSS.

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