Bootstrap is one of the world's most popular and easy-to-use frontend UI toolkits for building responsive websites, but few know how to get the most out of its vast range of components, utilities, JavaScript plugins, and other features. The Missing Bootstrap 5 Guide will help you customize Bootstrap 5 with Sass to achieve a layout that stands out from the crowd, enabling you to create something unique that doesn't look like it was created with Bootstrap. With this practical guide to Bootstrap customization, developers working with Bootstrap will be able to utilize powerful customization techniques to create websites with unique designs and exclusive features. You'll see how you can develop a visually appealing website quickly and easily by taking a hands-on approach to customizing your website using advanced features of CSS, Sass, and JavaScript. Starting with learning how the Bootstrap 5 visual style is created with Sass, you'll find out how to customize it to fit your needs while achieving the website look you want. You'll then use this knowledge to create a website using most of Bootstrap 5's components and customization with Sass and JavaScript. Finally, you'll explore various advanced Bootstrap 5 topics related to Sass, CSS, JavaScript, and source code optimization. By the end of this book, you'll be able to design and build modern, captivating, and unique websites on your own using the immense capabilities of Bootstrap 5. This book is for UI designers and developers who are familiar with HTML and have prior experience with Bootstrap. Frontend as well as backend developers using Bootstrap, who don't know how to code CSS but have a solid grasp on HTML, will also find this book useful. Experienced users of the default Bootstrap files can use this book to learn all about customization and other advanced features.