----------
20190925

https://getbootstrap.com/docs/4.3/getting-started/download/

bootstrap-4.3.1-dist.zip:
Compiled CSS and JS
Download ready-to-use compiled code for Bootstrap v4.3.1 to easily drop into your project, which includes:
Compiled and minified CSS bundles (see CSS files comparison)
Compiled and minified JavaScript plugins
This doesn’t include documentation, source files, or any optional JavaScript dependencies (jQuery and Popper.js).

bootstrap-4.3.1.zip:
Source files
Compile Bootstrap with your own asset pipeline by downloading our source Sass, JavaScript, and documentation files. This option requires some additional tooling:
Sass compiler (Libsass or Ruby Sass is supported) for compiling your CSS.
Autoprefixer for CSS vendor prefixing
Should you require build tools, they are included for developing Bootstrap and its docs, but they’re likely unsuitable for your own purposes.


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20171107

http://getbootstrap.com/docs/4.0/getting-started/download/
https://hackerthemes.com/bootstrap-cheatsheet/#form-inline

表單參考:
http://bootstrap.hexschool.com/docs/4.0/components/forms/


<form class="form-inline">
  <label class="sr-only" for="inlineFormInput">Name</label>
  <input class="form-control mb-2 mr-sm-2 mb-sm-0" id="inlineFormInput" type="text" placeholder="Jane Doe">

  <label class="sr-only" for="inlineFormInputGroup">Username</label>
  <div class="input-group mb-2 mr-sm-2 mb-sm-0">
    <div class="input-group-addon">@</div>
    <input class="form-control" id="inlineFormInputGroup" type="text" placeholder="Username">
  </div>

  <div class="form-check mb-2 mr-sm-2 mb-sm-0">
    <label class="form-check-label">
      <input class="form-check-input" type="checkbox"> Remember me
    </label>
  </div>

  <button class="btn btn-primary" type="submit">Submit</button>
</form>


----------
bootstrap-4.0.0-beta.2-dist.zip

Compiled CSS and JS
Download ready-to-use compiled code for Bootstrap v4.0.0-beta.2 to easily drop into your project, which includes:
Compiled and minified CSS bundles (see CSS files comparison)
Compiled and minified JavaScript plugins
This doesn’t include documentation, source files, or any optional JavaScript dependencies (jQuery and Popper.js).


----------
bootstrap-4.0.0-beta.2.zip

Source files
Compile Bootstrap with your own asset pipeline by downloading our source Sass, JavaScript, and documentation files. This option requires some additional tooling:
Sass compiler (Libsass or Ruby Sass is supported) for compiling your CSS.
Autoprefixer for CSS vendor prefixing
Should you require build tools, they are included for developing Bootstrap and its docs, but they’re likely unsuitable for your own purposes.


----------
Bootstrap CDN
Skip the download with the Bootstrap CDN to deliver cached version of Bootstrap’s compiled CSS and JS to your project.
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>


If you’re using our compiled JavaScript, don’t forget to include CDN versions of jQuery and Popper.js before it.
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>