Saturday, June 15, 2024
HomeComputerBootstrap 5.3.0-alpha2: What's New and How to Get Started

Bootstrap 5.3.0-alpha2: What’s New and How to Get Started

Hi Readers!

If you are a web developer, Bootstrap is the most popular front-end framework for developing responsive, mobile-first projects on the web. Bootstrap is a collection of CSS and JavaScript components that make it easy to create beautiful and functional websites with minimal effort.

Bootstrap has been around for a decade and has evolved a lot over the years. The latest version, Bootstrap 5.3.0-alpha2, was released on March 24, 2023, and it brings many enhancements and bug fixes for the new color modes feature introduced in the first alpha.

Color modes allow you to switch between light and dark themes for your website, depending on your preference or your device’s system settings. This can improve the user experience and accessibility of your website and save battery life on mobile devices.

In this blog post, we will look at some of the new features and changes in Bootstrap 5.3.0-alpha2 and how you can get started with using it in your projects.

## New Features and Changes

Bootstrap 5.3.0-alpha2 is a monumental update for Bootstrap 5. It’s big enough that it could’ve been a v6 on its own, but the developers wanted to do right by the community and get color modes out the door without the massive major release upgrade.

Here are some of the highlights of what’s new and improved in this release:

Dark mode colors

Dark mode colors are now derived from the theme colors (e.g., `$primary`) in Sass rather than color-specific tints or shades (e.g., `$blue-300`). This allows for a more automated dark mode when customizing the default theme colors.

Sass maps added

Added Sass maps for generating theme colors for dark mode text, subtle background, and subtle border.


Snippet examples are now ready for dark mode with updated markup and reduced custom styles.

Added Color-Scheme

Added `color-scheme: dark` too dark mode CSS to change OS-level controls like scrollbars.

Developed Backend

Improved HTML and JavaScript for the color mode toggle script. The selector for changing the active SVG has been improved, and the markup has been made more accessible with ARIA attributes.

Code Syntax

Improved docs code syntax colors and more across light and dark modes.

Removed the ability to nest light mode components within the dark mode. Unfortunately, this was incomplete and is only practical with quadrupling our selectors for every component. In v6!


 Form validation `border-color` and `text-color` states now respond to dark mode, thanks to new Sass and CSS variables.

Control Background

Dropped recently added form control background CSS variables and reassigned the Sass variables to use CSS variables instead. This simplifies the styling across color modes and avoids an issue where form controls in dark mode wouldn’t update properly.

Mode Change

Our box shadows will always stay dark again instead of inverting to white when in dark mode.

Cards Color

Cards now have a color set on them to improve rendering across color modes.

New Navbar

 Added a new `.nav-underline` variant for our navigation with a more straightforward bottom border under the active nav link. See the docs for an example.

-Navs now have new `:focus-visible` styles that better match our custom button focus styles.

– Added a new `.icon-link` helper to place and align Bootstrap Icons alongside a textual link quickly. Icon links support our new link utilities, too.

There are many more changes and fixes in this release, so make sure to check out the [changelog]( for the complete list.

Also Read:

## How to Get Started

If you want to try out Bootstrap 5.3.0-alpha2 in your projects, there are several ways you can download or include it.

### Compiled CSS and JS

You can download ready-to-use compiled code for Bootstrap 5.3.0-alpha2 to drop into your project, which includes: quickly.

– Compiled and minified CSS bundles (see [CSS files comparison](

– Compiled and minified JavaScript plugins (see [JS files comparison](

This doesn’t include documentation, source files, or any optional JavaScript dependencies like Popper.

[Download compiled CSS and JS](

How is Bootstrap 5.3.0-alpha2 better than Bootstrap 5.3.0-alpha1?

Bootstrap 5.3.0-alpha2 is the latest pre-release version of the popular front-end framework for building responsive websites and web applications. It comes with several improvements and bug fixes over Bootstrap 5.3.0-alpha1, released in February 2023. Here are some of the main features and changes that make Bootstrap 5.3.0-alpha2 better than Bootstrap 5.3.0-alpha1:

New Component Added

– Added a new component called Toasts, which are lightweight notifications that can be displayed in any corner of the screen. Toasts can be customized with different colors, icons, and animations and dismissed by the user or automatically after a specific time.

Improved Accessibility

Improved the accessibility and usability of the Carousel component, which allows the creation of images, videos, or other content slideshows. The carousel now supports keyboard navigation, touch gestures, swipe events, and pause and resume controls.

Grid System Upgradation

Updated the Grid system, which is the core of Bootstrap’s layout system. Grid now supports subgrid functionality, which allows creation of nested grids within grid items. Subgrids can create complex layouts with more flexibility and alignment options.

Bug Issues Fixed

Fixed several bugs and issues related to the Modal component, which is used to create pop-up windows that overlay the main content. Modal now has better focus management, scrolling behavior, and responsiveness on different screen sizes and devices.

Improved Performance

Enhanced the performance and compatibility of Bootstrap’s custom CSS properties, which are used to define global variables and themes. Custom CSS properties now work better with dark mode, RTL languages, and browsers that do not support them natively.

Downloads For Bootstrap

These are just some of the highlights of Bootstrap 5.3.0-alpha2, which is still in development and not recommended for production use. To learn more about Bootstrap 5.3.0-alpha2 and how to use it, you can visit the official documentation at

You can download Bootstrap 5.3.0-alpha2 from

or use it via CDN at

Bootstrap 5.3.0-alpha2 is a great way to test the latest features and improvements of Bootstrap and provide feedback to the developers before the final release.

How to use Bootstrap in building a website?

Bootstrap is a popular framework for creating responsive and mobile-friendly websites. It provides a set of predefined classes and components that can be used to style and lay out web pages without writing much CSS code. Bootstrap also has a grid system that allows you to arrange elements on different screen sizes and devices easily.

To use Bootstrap in building a website, you need to do the following steps:

Download the Bootstrap

Download the bootstrap files from or use a CDN (content delivery network) link to include them in your HTML file. You need to include both the bootstrap CSS and JS files and jQuery, which is a dependency for some bootstrap features.

Add the Bootstrap Classes and Components

Add the bootstrap classes and components to your HTML elements according to the documentation and examples on For example, you can use the .container class to create a fixed-width container for your content or the .row and .col classes to create a grid layout. You can also use components like a navbar, carousel, modal, etc., to add interactivity and functionality to your website.

Customize the Bootstrap

Customize the bootstrap styles and behavior according to your preferences and needs. You can use the custom CSS variables bootstrap provides to change the default theme’s colors, fonts, spacing, etc. You can also use the custom JS events that Bootstrap triggers to add your logic and functionality to the components.

Test Your Website

Test your website on different browsers, devices, and screen sizes to ensure it is responsive and mobile-friendly. You can use tools like Chrome DevTools or Firefox Developer Tools to simulate different devices and resolutions. You can also use online tools like or to test your website on real devices.

Components of Bootstrap generally used: Navbar, Carousel, Grids, Accordion, Card, Icons

Bootstrap is a popular framework for creating responsive and mobile-friendly websites. Bootstrap provides several components to help you design and layout your web pages. Some of the most common components are:

– Navbar:

A navigation bar containing links, menus, buttons, forms, and other elements. A navbar can be fixed at the top or bottom of the page or collapse into a hamburger icon on smaller screens.

– Carousel:

A slideshow that can display images, text, or other content. A carousel can have indicators, controls, captions, and animations. You can use a carousel to showcase your products, services, or features.

– Grids:

A system of rows and columns that can help you organize your content into a responsive layout. Grids can have different sizes, alignments, offsets, and breakpoints, and you can use grids to create layouts for different screen sizes and devices.

– Accordion:

A collapsible panel that can show or hide content when clicked. An accordion can have multiple panels that can be opened or closed independently or together. You can use an accordion to display FAQs, terms, and conditions, or other information that needs to be compacted.

– Card:

A flexible container that can hold different types of content, such as images, text, buttons, links, or icons. A card can have different styles, sizes, orientations, and alignments. You can use a card to display products, testimonials, profiles, or other information that needs to be highlighted.


Alignments- Margin & Spacing

Bootstrap is a popular framework for creating responsive web pages. One of the features of Bootstrap is the ability to use predefined classes to align elements and control the margin and spacing of the layout. This article will explore some of the classes Bootstrap provides for alignments, margin, and spacing.


Bootstrap uses the flexbox model to align elements horizontally and vertically. Flexbox is a CSS layout mode that allows elements to adjust their size and position based on the available space and the alignment properties. To use flexbox in Bootstrap, we need to add the class `d-flex` to the parent element that contains the elements we want to align. Then, we can use the following classes to control the alignment:

– `align-items-start`: aligns the items to the start of the cross axis (the axis perpendicular to the central axis).

– `align-items-end`: aligns the items to the end of the cross-axis.

– `align-items-center`: aligns the items to the center of the cross-axis.

– `align-items-baseline`: aligns the items to their baselines (the line where the text sits).

– `align-items-stretch`: stretches the items to fill the cross axis (the default behavior).

For example, if we want to align two buttons vertically in a column, we can use the following code:

<div class="d-grid gap-2 col-6 mx-auto">
  <button class="btn btn-primary" type="button">Button</button>
  <button class="btn btn-primary" type="button">Button</button>

CSS is more time-consuming and also space-taking than Bootstrap. Why?

CSS stands for Cascading Style Sheets, a language that defines how HTML elements are displayed on a web page. Bootstrap is a framework that provides ready-made CSS classes and components that can be used to create responsive and modern web designs.

One of the reasons why CSS is more time-consuming than Bootstrap is that CSS requires more coding and customization to achieve the desired layout and style. Bootstrap, on the other hand, offers predefined classes and components that can be easily applied to HTML elements with minimal coding. For example, to create a grid system with CSS, one would have to write several lines of code to define the columns, rows, margins, paddings, etc. With Bootstrap, one can use the class names like .container, .row, .col, etc., to create a grid system with less code.

Another reason CSS is more space-taking than Bootstrap is that CSS files tend to grow larger as more styles are added. Bootstrap, on the other hand, has a modular structure that allows users only to include the components and features they need for their project. For example, if one only needs the grid system and some typography styles from Bootstrap, one can download a customized version of Bootstrap that only contains those features. This way, they can reduce the size of their bootstrap file and save some space.

In conclusion, CSS is more time-consuming and space-taking than Bootstrap because CSS requires more coding and customization to create web designs. At the same time, Bootstrap provides ready-made classes and components that can be easily used with less code. Bootstrap also has a modular structure that allows users only to include the features they need for their project, which can reduce the size of their bootstrap file and save some space.


Bootstrap 5.3.0-alpha2 is the latest pre-release version of the popular front-end framework. It introduces some new features and bug fixes, such as:

– Improved RTL support for carousel, dropdown, and offcanvas components

– Added a new `.bg-body` utility class for background color

– Fixed a regression with the `.accordion-flush` class

– Updated the documentation with more examples and accessibility guidelines

You can download Bootstrap 5.3.0-alpha2 from the official website or use a CDN to get started. Remember that this is an alpha version and not recommended for production use. If you encounter any issues or have any feedback, please report them on GitHub. Happy coding!

To read more blogs, click here.

IEMLabs is an ISO 27001:2013 and ISO 9001:2015 certified company, we are also a proud member of EC Council, NASSCOM, Data Security Council of India (DSCI), Indian Chamber of Commerce (ICC), U.S. Chamber of Commerce, and Confederation of Indian Industry (CII). The company was established in 2016 with a vision in mind to provide Cyber Security to the digital world and make them Hack Proof. The question is why are we suddenly talking about Cyber Security and all this stuff? With the development of technology, more and more companies are shifting their business to Digital World which is resulting in the increase in Cyber Crimes.


Please enter your comment!
Please enter your name here

Most Popular

Recent Comments

Izzi Казино онлайн казино казино x мобильді нұсқасы on Instagram and Facebook Video Download Made Easy with
Temporada 2022-2023 on CamPhish
2017 Grammy Outfits on Meesho Supplier Panel: Register Now!
React JS Training in Bangalore on Best Online Learning Platforms in India
DigiSec Technologies | Digital Marketing agency in Melbourne on Buy your favourite Mobile on EMI
亚洲A∨精品无码一区二区观看 on Restaurant Scheduling 101 For Better Business Performance

Write For Us