如何利用Bootstrap API创建CHM格式的帮助文档？

Bootstrap API Cheat Sheet

1. Introduction to Bootstrap

Bootstrap is a popular front-end framework developed by Twitter, designed to make web development faster and easier. It provides a set of predefined classes and components that you can use to create responsive and mobile-first websites. The Bootstrap API includes various elements such as grids, buttons, navigation bars, forms, modals, and more. This cheat sheet will cover some of the most commonly used Bootstrap classes and their functionalities.

2. Grid System

The Bootstrap grid system allows you to create a responsive layout by dividing your page into 12 columns. You can use these columns to create different layouts depending on the screen size. Below is a table summarizing the basic grid classes:

3. Typography

Bootstrap provides various classes for typography, including headings, paragraphs, and text alignment. Here are some common classes:

4. Colors

Bootstrap uses a set of predefined colors for text, backgrounds, and borders. You can apply these colors using utility classes like:

5. Buttons

Bootstrap offers a variety of button styles and sizes. Here are some common button classes:

6. Forms

Bootstrap provides a range of input types, layouts, and validation states for forms. Some common form classes include:

7. Tables

Bootstrap tables are responsive and come with various classes for styling:

8. Navbars

Bootstrap's navigation bar (navbar) component is a responsive component that adapts its layout based on the device's screen size. Common classes include:

9. Modals

Modals are dialog boxes that can be triggered by a button or link and contain content that requires user interaction before proceeding. Key classes include:

Questions and Answers

Q1: How do I create a responsive grid layout with two equal columns using Bootstrap?

A1: To create a responsive grid layout with two equal columns, you can use the following HTML structure with appropriate Bootstrap classes:

<div class="container">
  <div class="row">
    <div class="col-md-6">Column 1</div>
    <div class="col-md-6">Column 2</div>
  </div>
</div>

This code will create two columns that are each half the width of the container on medium and larger screens. On smaller screens, the columns will stack vertically.

Q2: What does the.navbar-expand class do in a Bootstrap navigation bar?

A2: The.navbar-expand class is used to make the navigation bar horizontal on all breakpoints. This means that the navigation items will not stack vertically on any screen size, providing a consistent horizontal layout across devices. If you want the nav bar to collapse into a vertical format on smaller screens, you should use one of the other.navbar-expand classes, such as.navbar-expand-md, which makes the nav horizontal from medium screens upwards.

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