Advantages Of Bootstrap 4:
Beginner-friendly: using Bootstrap 4 requires minimal knowledge to make good use of its core elements.
Responsive: this framework has components specifically oriented towards making your web applications be responsive and look good on both computers and mobile devices.
Mobile-first approach: mobile device-oriented styles are part of the core framework.
Browser compatibility: compatible with all major browsers.
Bootstrap 4, currently in alpha 6, has come with major and exciting changes with it.
Bootstrap 4 Flex Layout:
Flexbox is a powerful tool that gives great flexibility and control to the components and their layout. You can apply Flexbox layout by using CSS properties defined by CSS3. Bootstrap 4 makes it even more easy by offering a set of ready made CSS classes for applying Flexbox layout to elements. In the following tutorial we’ll take a deeper look the Bootstrap 4 CSS Flexbox layout classes. But now that Bootstrap is flexbox by default, IE9 support is dropped. the variable $enable-flex is no longer needed. Most components in Bootstrap 4 utilizes flexbox.
Defining Some CSS Classes of Flex:
The customization requires you to only update a variable and then recompile. All Sass variables used in Bootstrap 4 are included in a file called _variable.scss. You can easily change the default values to these variables by copying these variables into another file called _custom.scss, change the value and remove the ‘!default’ tag. SASS stands for Syntactically Awesome Stylesheet.
Bootstrap 4 offers a greate range of utility classes. The classes we will describe in this tutorial make styling items easier and quicker without writing any new CSS. Utility classes can significantly improve development time. For example, add responsive-friendly margin or padding values to an element using spacing utilities, flexbox utilities help you easily manage the layouts, sizing, and alignment, Display Property utilities help you to set an elements display property to block, inline or inline block, change the alignment of elements using vertical alignment utilities, etc.
Bootstrap v4 is not a major release in rewriting the framework. Bootstrap has many more changes and improvements in store in terms of typography, styles, and layouts of components. To understand all the changes made try to go through the documentation on their official website It will definitely improve the development and user experience of a responsive website. I really hope you liked it and it offered some good insight on Bootstrap. This is after all a great framework, really easy to use and to learn.