Bootstrap 4 is developed mobile first, a strategy in which we optimize code for mobile devices first and then scale up components as necessary using CSS media queries.
Originally created by a designer and a developer at Twitter, Bootstrap has become one of the most popular front-end frameworks and open source projects in the world.
Bootstrap 4 was created at Twitter in mid-2010 by @mdo and @fat. Prior to being an open-sourced framework, Bootstrap was known as Twitter Blueprint. A few months into development, Twitter held its first Hack Week and the project exploded as developers of all skill levels jumped in without any external guidance. It served as the style guide for internal tools development at the company for over a year before its public release, and continues to do so today.
1. Bootstrap 4 CSS and JS
Bootstrap 4 includes several components and options for laying out your project, including wrapping containers, a powerful flexbox grid system, a flexible media object, and responsive utility classes.
Containers are the most basic layout element in Bootstrap 4 and are required when using our default grid system. Choose from a responsive, fixed-width container (meaning its max-width changes at each breakpoint) or fluid-width (meaning it’s 100% wide all the time).While containers can be nested, most layouts do not require a nested container.
b. Responsive Breakpoints
Since Bootstrap 4 is developed to be mobile first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces. These breakpoints are mostly based on minimum viewport widths and allow us to scale up elements as the viewport changes.
Bootstrap 4 primarily uses the following media query ranges—or breakpoints—in our source Sass files for our layout, grid system, and components.
c. Z – index
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3. One framework, every device
Bootstrap 4 easily and efficiently scales your websites and applications with a single code base, from phones to tablets to desktops with CSS media queries.
4. Full of features
With Bootstrap 4, you get extensive and beautiful documentation for common HTML elements, dozens of custom HTML and CSS components, and awesome jQuery plugins.
5. Bootstrap v4 is available for download
Almost including how to download and use it, some basic templates and examples, and more. Here’s how to quickly get started with the Bootstrap.Click the below Option to download.