Developers like to use Bootstrap because it saves time and improves efficiency, has a built-in responsive design, and is compatible with mainstream browsers. 1. Provide ready-made components such as buttons, navigation bars, modal boxes, etc., which are used directly without writing from scratch; 2. The grid system is based on flexbox, supports responsive layout, and is adapted to different devices; 3. It handles cross-browser compatibility issues to reduce the risk of style confusion. Core functions include: CSS style library, grid system, JavaScript plug-ins, and tool classes. When using it, you need to introduce CSS and JS files. It is recommended to load them through CDN. You can directly copy the official document code using components, and you can also customize the theme style through Sass. Frequently asked questions for beginners include forgetting to load JS, version differences, style conflicts, etc. After mastering it, it can greatly improve development efficiency, especially suitable for prototypes and small and medium-sized projects.
Bootstrap is an open source framework for front-end development, mainly used to quickly build responsive, mobile-first web pages. It provides a set of ready-made HTML and CSS design templates, including common web elements such as buttons, forms, navigation bars, etc., and also incorporates JavaScript plug-ins to enhance interaction.
Simply put, using Bootstrap can enable you to build a website with clear structure, unified style and good compatibility faster without writing a lot of basic code from scratch.
Why do developers like to use Bootstrap?
Save time and improve efficiency
If you manually write the style of each button, table, or grid layout, it is not only time consuming but also error-prone. Bootstrap provides out-of-the-box components, such as button styles ( .btn ), navigation bars ( .navbar ), modal boxes ( Modal ), etc. You only need to copy the class name to use it directly.
Built-in support for responsive design
Bootstrap's mesh system is based on flexbox layout, allowing easy adaptive display on different devices. For example, using classes such as .container , .row , and .col-md-6 can control the display of layout on desktop and mobile phones.
Good cross-browser compatibility
Bootstrap has dealt with compatibility issues for mainstream browsers, such as IE, Chrome, Firefox, etc., which means you can worry less about styling.
What core features does Bootstrap include?
- CSS style library : provides styles for basic UI components such as buttons, tables, form controls, etc.
- Grid system : divides page layout through rows and columns, and supports responsive breakpoints (sm, md, lg, xl).
- JavaScript plug-ins : such as carousel, drop-down menu, pop-up window (Modal), etc., to enhance the interactive experience.
- Utility classes : used to set small-scale style adjustments such as margins, inner margins, color, text alignment, etc.
For example:
You want to add a blue button, just write it like this:
<button class="btn btn-primary">Submit</button>
You don’t need to define the background color, rounded corners, or hover effects yourself, these have been encapsulated.
How to get started with Bootstrap?
Introducing Bootstrap files (CDN is the most convenient)
Add the following CDN link to<head>of the HTML file to use:<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
Loading JavaScript plugin (if needed)
Place at the bottom of the page or before</body>:<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
Use the components to directly refer to the official documentation and copy the component code you need to paste into your page.
Custom style (optional)
If you don't want to use the default theme, you can use Sass to compile and customize variables, such as modifying the main tone, font size, etc.- Forgot to introduce JS or jQuery : Some plugins rely on JavaScript and cannot run without loading.
- Version difference : There is a difference between Bootstrap 4 and 5, such as 5 removing jQuery dependencies, which need to be paid attention to.
- Style conflict : CSS written by yourself may overwrite the style of Bootstrap, and it is recommended to use browser developer tools to check it.
Tips: Common problems for beginners
Basically that's all. After mastering the basic usage, you will find that Bootstrap is really practical, especially when doing project prototypes or small and medium-sized websites, which can save a lot of effort.
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