To view the Bootstrap source code, clone or download the project on the GitHub repository. The main source files are located in the scss and js directories, organized by variables, components, and utilities, and run Bootstrap locally for debugging.
How to view Bootstrap source code
Bootstrap is a popular CSS framework for building responsive websites. Its source code can be used to further customize or solve problems.
step:
- Visit the Bootstrap GitHub repository: https://github.com/twbs/bootstrap
-
Download or clone the repository:
- Download: Click the "Download ZIP" button on the repository page.
- Clone: ??Use the Git command
git clone https://github.com/twbs/bootstrap.git
to clone the repository.
-
Open the source code file:
- Unzip the ZIP file or enter the cloned repository directory.
-
The main source code files are located in
scss
andjs
directories:-
scss/bootstrap.scss
: main Sass file -
js/bootstrap.js
: main JavaScript file
-
structure:
Bootstrap source code is organized by variables, components, and utilities.
Variable: Defines the default value of the framework. Defined in scss/_variables.scss
.
Components: Provides pre-built components for building website elements. Each component has its own Sass and JavaScript files, for example:
-
scss/base/_alerts.scss
andjs/src/alert.js
(alarm component) -
scss/base/_buttons.scss
andjs/src/button.js
(button component)
Utilities: Classes that provide common features such as float, positioning, and color. Defined in scss/_utilities.scss
.
hint:
- Use the search bar to find specific files or content.
- Run Bootstrap locally to understand how it actually works and debug problems.
- Understand the basics of Sass and JavaScript to better understand the source code.
The above is the detailed content of How to read the bootstrap source code. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

To change the text color in CSS, you need to use the color attribute; 1. Use the color attribute to set the text foreground color, supporting color names (such as red), hexadecimal codes (such as #ff0000), RGB values (such as rgb(255,0,0)), HSL values (such as hsl(0,100%,50%)), and RGBA or HSLA with transparency (such as rgba(255,0,0,0.5)); 2. You can apply colors to any element containing text, such as h1 to h6 titles, paragraph p, link a (note the color settings of different states of a:link, a:visited, a:hover, a:active), buttons, div, span, etc.; 3. Most

The real use of battle royale in the dual currency system has not yet happened. Conclusion In August 2023, the MakerDAO ecological lending protocol Spark gave an annualized return of $DAI8%. Then Sun Chi entered in batches, investing a total of 230,000 $stETH, accounting for more than 15% of Spark's deposits, forcing MakerDAO to make an emergency proposal to lower the interest rate to 5%. MakerDAO's original intention was to "subsidize" the usage rate of $DAI, almost becoming Justin Sun's Solo Yield. July 2025, Ethe

What can truly make money stably is countercyclical traders with anti-human characteristics. 1. They identify whales in the market FOMO by fighting emotional kidnapping, and capture wrongly killed assets when panic sell-offs; 2. Establish mechanized trading discipline and strictly implement stop-profit and stop-loss rules to fight greed and fear; 3. Use cognitive arbitrage thinking to discover institutional trends and trend opportunities in advance through on-chain data and code updates and other underlying information, and ultimately solidify emotional isolation, data decision-making and countercyclical operations into trading instincts, thereby continuing to make profits in the encrypted market with amplified human nature.

In web development, the choice of CSS units depends on design requirements and responsive performance. 1. Pixels (px) are used to fix sizes such as borders and icons, but are not conducive to responsive design; 2. Percentage (%) is adjusted according to the parent container, suitable for streaming layout but attention to context dependence; 3.em is based on the current font size, rem is based on the root element font, suitable for elastic fonts and unified theme control; 4. Viewport units (vw/vh/vmin/vmax) are adjusted according to the screen size, suitable for full-screen elements and dynamic UI; 5. Auto, inherit, initial and other values are used to automatically calculate, inherit or reset styles, which helps to flexibly layout and style management. The rational use of these units can improve page flexibility and responsiveness.

The style of the link should distinguish different states through pseudo-classes. 1. Use a:link to set the unreached link style, 2. a:visited to set the accessed link, 3. a:hover to set the hover effect, 4. a:active to set the click-time style, 5. a:focus ensures keyboard accessibility, always follow the LVHA order to avoid style conflicts. You can improve usability and accessibility by adding padding, cursor:pointer and retaining or customizing focus outlines. You can also use border-bottom or animation underscore to ensure that the link has a good user experience and accessibility in all states.

User agent stylesheets are the default CSS styles that browsers automatically apply to ensure that HTML elements that have not added custom styles are still basic readable. They affect the initial appearance of the page, but there are differences between browsers, which may lead to inconsistent display. Developers often solve this problem by resetting or standardizing styles. Use the Developer Tools' Compute or Style panel to view the default styles. Common coverage operations include clearing inner and outer margins, modifying link underscores, adjusting title sizes and unifying button styles. Understanding user agent styles can help improve cross-browser consistency and enable precise layout control.

The top ten leading stablecoins in 2025 are forecasted as: 1. USDT ranks first with its first-mover advantage and extremely high liquidity; 2. USDC follows closely with high compliance and transparency; 3. DAI, as a decentralized stablecoin, has a solid position in DeFi; 4. FDUSD benefits from Binance's rapid development; 5. PYUSD relies on PayPal ecosystem to have great potential to connect to traditional payments; 6. USDD attracts users through high returns within the Tron ecosystem; 7. TUSD emphasizes transparency through real-time auditing and multi-institutional custody; 8. FRAX innovatively adopts score algorithm mechanism to improve capital efficiency; 9. GUSD is regulated by NYDFS and monthly audits ensure security; 10. USDP as

Table of Contents Market Interpretation of the concentrated shipment of ancient giant whales, BTC prices quickly repair ETH close to $4,000 key position, polarization of pledge and fund demand, altcoin sector differentiation intensifies, Solana and XRP funds inflows highlight market hotspots pay attention to macro data and policy trends, and market fluctuations may intensify last week (July 22-July 28). BTC maintained a high-level oscillation pattern. The ETH capital inflow trend continues to improve, the ETH spot ETF has achieved net inflow for eight consecutive weeks, and the ETH market share has climbed to 11.8%. On July 25, affected by the massive selling of Galaxy Digital, BTC fell below $115,000 for a short time, reaching the lowest point
