How to check if Bootstrap's code is correct
Apr 07, 2025 am 09:51 AMTo check whether the Bootstrap code is correct, you need to pay attention to the following aspects: HTML structure: Check whether it complies with the specifications, such as whether the correct use of container, row, and col and whether the sum of the number is 12. CSS class name: Make sure the spelling is correct and the upper and lower case is consistent to avoid conflicts with the Bootstrap style. CSS conflict: Use browser developer tools to view element styles and confirm whether they are overwritten by custom CSS. JavaScript: Check whether the plug-in JS file is correctly introduced and initialized, and pay attention to the console error message.
Bootstrap code, is it right?
Many friends will have this question when using Bootstrap: Is my code written correctly? It looks quite like that, but the effect is just wrong, which makes people crazy! In fact, there is no universal formula to check whether the Bootstrap code is correct, but there are some routines and techniques that can help you quickly locate problems.
Let me tell you the truth first. Bootstrap itself is a giant, with huge amount of CSS and JS code. It is not easy to fully understand its internal mechanism in just a few years. Therefore, we cannot expect to debug through lines of code. We must learn to "save the country on a curve".
Basics: You need to know how Bootstrap works
The core of Bootstrap is the CSS framework, which defines a pre-set style. You only need to use the appropriate HTML tags and class names to quickly build the page. It's like building a house. Bootstrap provides prefabricated bricks and cement, you just need to build them according to the instructions. But if you pile up bricks randomly, the house will definitely collapse.
Therefore, it is very important to understand Bootstrap's class names, components and responsive design mechanisms. You need to know what class names such as .container
, .row
, and .col
are used, how are the components such as btn
and navbar
used, and how are responsive effects implemented under different screen sizes. The official document is the best teacher. Don’t think it is long. Look at it more and practice it more, and you will find that it is actually easy to understand.
Core: Checkpoints, no one can be missing
When checking the Bootstrap code, I usually start from the following aspects:
- HTML Structure: Does your HTML Structure comply with Bootstrap's specifications? Are the class names such as
container
,row
, andcol
correctly used? Does the number ofcol
add up to 12 (or other grid system you customize)? It’s like building a house. If the foundation is not laid well, the house will definitely be crooked. Browser Developer Tools (F12) are your good helper, which allows you to clearly see the HTML structure and corresponding CSS styles. - CSS class name: Is the Bootstrap class name you are using correctly spelled? Is the case consistent? Bootstrap is very sensitive to the case of class names. If a letter is wrong, the style may be incorrect. It is recommended to use a code editor here. Many editors have automatic completion function to reduce spelling errors.
- CSS conflict: Does your custom CSS style conflict with Bootstrap's style? It's like two people conducting a band at the same time, and the result will definitely be messy. You can use the browser's developer tools to view the styles of elements and see which styles are overwritten. There are many solutions, such as using more specific class names, or using
!important
(use with caution!), or adjusting the loading order of CSS. - JavaScript: If your code uses Bootstrap's JavaScript plugin, make sure you correctly introduce the relevant JS files and initialize the plugin correctly. This is like a car's engine. If the engine is not started, the car will definitely not be able to run. Check whether there is any error message on the console (console) which is a very important clue.
Code example: A simple example, see how to troubleshoot
Suppose you want to create a simple button:
<code class="html"><button class="btn btn-primary">Click me</button></code>
If this button does not show the style of Bootstrap, then you need to check:
- Is the CSS file of Bootstrap correctly introduced?
- Are
btn
andbtn-primary
class names spelled correctly? - Is there any other CSS style that overwrites the style of Bootstrap.
Performance optimization and best practices
Although Bootstrap is convenient, it is also relatively bloated. To improve website performance, you can consider introducing only the required components instead of all. In addition, the rational use of CSS preprocessors (such as Sass or Less) can improve the maintainability and readability of the code.
Sharing experience of trampling on pitfalls: Don't forget to check browser compatibility
Although Bootstrap claims to be cross-browser compatible, the reality is that different browsers may have slightly different parsing of CSS. Therefore, it is very important to test your code in different browsers. Don't forget that IE (although it's almost eliminated) is also a browser to consider.
In short, checking the correctness of Bootstrap code requires combining experience and skills, practice and summary, and you can become a Bootstrap expert! Remember, developer tools are your good friends, and making good use of them can help you solve many problems.
The above is the detailed content of How to check if Bootstrap's code is correct. 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)

Hot Topics

Ordinary investors can discover potential tokens by tracking "smart money", which are high-profit addresses, and paying attention to their trends can provide leading indicators. 1. Use tools such as Nansen and Arkham Intelligence to analyze the data on the chain to view the buying and holdings of smart money; 2. Use Dune Analytics to obtain community-created dashboards to monitor the flow of funds; 3. Follow platforms such as Lookonchain to obtain real-time intelligence. Recently, Cangming Money is planning to re-polize LRT track, DePIN project, modular ecosystem and RWA protocol. For example, a certain LRT protocol has obtained a large amount of early deposits, a certain DePIN project has been accumulated continuously, a certain game public chain has been supported by the industry treasury, and a certain RWA protocol has attracted institutions to enter.

DAI is suitable for users who attach importance to the concept of decentralization, actively participate in the DeFi ecosystem, need cross-chain asset liquidity, and pursue asset transparency and autonomy. 1. Supporters of the decentralization concept trust smart contracts and community governance; 2. DeFi users can be used for lending, pledge, and liquidity mining; 3. Cross-chain users can achieve flexible transfer of multi-chain assets; 4. Governance participants can influence system decisions through voting. Its main scenarios include decentralized lending, asset hedging, liquidity mining, cross-border payments and community governance. At the same time, it is necessary to pay attention to system risks, mortgage fluctuations risks and technical threshold issues.

To create responsive images using CSS, it can be mainly achieved through the following methods: 1. Use max-width:100% and height:auto to allow the image to adapt to the container width while maintaining the proportion; 2. Use HTML's srcset and sizes attributes to intelligently load the image sources adapted to different screens; 3. Use object-fit and object-position to control image cropping and focus display. Together, these methods ensure that the images are presented clearly and beautifully on different devices.

The coordinated rise of Bitcoin, Chainlink and RWA marks the shift toward institutional narrative dominance in the crypto market. Bitcoin, as a macro hedging asset allocated by institutions, provides a stable foundation for the market; Chainlink has become a key bridge connecting the reality and the digital world through oracle and cross-chain technology; RWA provides a compliance path for traditional capital entry. The three jointly built a complete logical closed loop of institutional entry: 1) allocate BTC to stabilize the balance sheet; 2) expand on-chain asset management through RWA; 3) rely on Chainlink to build underlying infrastructure, indicating that the market has entered a new stage driven by real demand.

Is DAI suitable for long-term holding? The answer depends on individual needs and risk preferences. 1. DAI is a decentralized stablecoin, generated by excessive collateral for crypto assets, suitable for users who pursue censorship resistance and transparency; 2. Its stability is slightly inferior to USDC, and may experience slight deansal due to collateral fluctuations; 3. Applicable to lending, pledge and governance scenarios in the DeFi ecosystem; 4. Pay attention to the upgrade and governance risks of MakerDAO system. If you pursue high stability and compliance guarantees, it is recommended to choose USDC; if you attach importance to the concept of decentralization and actively participate in DeFi applications, DAI has long-term value. The combination of the two can also improve the security and flexibility of asset allocation.

The role of Ethereum smart contract is to realize decentralized, automated and transparent protocol execution. Its core functions include: 1. As the core logic layer of DApp, it supports token issuance, DeFi, NFT and other functions; 2. Automatically execute contracts through code to reduce the risks of human intervention and fraud; 3. Build a DeFi ecosystem so that users can directly conduct financial operations such as lending and transactions; 4. Create and manage digital assets to ensure uniqueness and verifiability; 5. Improve the transparency and security of supply chain and identity verification; 6. Support DAO governance and realize decentralized decision-making.

opacity is an attribute in CSS that controls the overall transparency of an element, with values ranging from 0 (fully transparent) to 1 (fully opaque). 1. It is often used for the image hover fade effect, and enhances the interactive experience by setting the opacity transition; 2. Making a background mask layer to improve text readability; 3. Visual feedback of control buttons or icons in the disabled state. Note that it affects all child elements, unlike rgba, which only affects the specified color part. Smooth animation can be achieved with transition, but frequent use may affect performance. It is recommended to use it in combination with will-change or transform. Rational application of opacity can enhance page hierarchy and interactivity, but it should avoid interfering with users.

Yes, Web3 infrastructure is exploding expectations as demand for AI heats up. Filecoin integrates computing power through the "Compute over Data" plan to support AI data processing and training; Render Network provides distributed GPU computing power to serve AIGC graph rendering; Arweave supports AI model weights and data traceability with permanent storage characteristics; the three are combining technology upgrades and ecological capital promotion, and are moving from the edge to the underlying core of AI.
