Book Image

Learning Bootstrap 4 - Second Edition

By : Matt Lambert
Book Image

Learning Bootstrap 4 - Second Edition

By: Matt Lambert

Overview of this book

Bootstrap, the most popular front-end framework built to design elegant, powerful, and responsive interfaces for professional-level web pages has undergone a major overhaul. Bootstrap 4 introduces a wide range of new features that make front-end web design even simpler and exciting. In this gentle and comprehensive book, we'll teach you everything that you need to know to start building websites with Bootstrap 4 in a practical way. You'll learn about build tools such as Node, Grunt, and many others. You'll also discover the principles of mobile-first design in order to ensure your pages can fit any screen size and meet the responsive requirements. Learn to play with Bootstrap's grid system and base CSS to ensure your designs are robust and that your development process is speedy and efficient. Then, you'll find out how you can extend your current build with some cool JavaScript Plugins, and throw in some Sass to spice things up and customize your themes. This book will make sure you're geared up and ready to build amazingly beautiful and responsive websites in a jiffy.
Table of Contents (15 chapters)
Learning Bootstrap 4 - Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
1
Introducing Bootstrap 4

Reboot defaults and basics


Let's start this chapter by reviewing the basics of Reboot when using content components in Bootstrap. One of the main changes for content components in Bootstrap 4 is the switch from em to rem units of measure. rem is short for root em and is a little bit different from a regular em unit. em is a relative unit to the font-size of the parent element it is contained within. This can cause a compounding issue in your code that can be difficult to deal with when you have a highly nested set of selectors. The rem unit is not relative to its parent, it is relative to the root or HTML element. This makes it much easier to determine the actual size of text or other content components that will appear on the screen.

The box-sizing property is globally set to border-box on every element. This is good because it ensures that the declared width of an element doesn't exceed its size due to excess margins or padding.

The base font-size for Bootstrap 4 is 16px and it is declared...