+$Responsive web design is no longer optional; sites simply have to be responsive these days. Thankfully RWD is easier than ever to implement as there are so many great tools to help you create and test your designs, and ensure you create the best用户体验。
+$Here's our roundup of some of the best resources that will guide you in making your websites work well and look great on any device.
+$01. How to start thinking responsively
在+$this post on FreeCodeCamp+$, Kevin Powell makes the important point that responsive web design's no longer a trend; it's the way sites are expected to be built, and that means thinking responsively from the start. Here he demonstrates how to get into the responsive frame of mind, while building a fully responsive 3-page website.
+$02. 9 Responsive Typography Tips
+$Responsive web design, naturally enough, needs responsive typography to go with it. But what does that even mean, and how do you implement it?+$We asked seven leading web designers+$for their tips on creating elegant, legible text in every viewport.
+$03. The rules of responsive web typography
+$Responsive web typography is tough – you need to have both design chops and technical know-how. But however tricky it might be, getting it wrong isn't an option, because typography is the cornerstone of web design. Follow+$these design principles and practical solutions+$to get it right.
+$04. Design a responsive site with em-based sizing
+$By using em units for font sizing, you can design components on the page that respond automatically should the font size change. Then, with a clever trick for a responsive font size, you can produce an entire page that adjusts dynamically based on the viewport width of the browser.+$Follow This Tutorial+$to learn how to leverage the 'relative' behaviour of ems to create designs that are scalable and responsive.
+$05. Priority guides: a content-first alternative to wireframes
+$Wireframes may be the most widely-used tool for designing websites, apps and other digital interfaces, but they're not without their drawbacks, particularly when it comes to responsive design. Here Heleen van Nues and Lennart Overkamp introduce their preferred alternative to wireframes:+$priority Guides+$, which contain content and elements for a mobile screen, sorted by hierarchy from top to bottom and without layout specifications.
+$06. The pro's guide to responsive web design
+$07. How to design responsive and device-agnostic forms
+$Forms are one of the most important elements in any digital product design, and whether you need a signup flow or a multi-view stepper, you need to design it so that'll work effectively on mobile devices just as well as on the desktop.+$Here's how to do it+$, complete with helpful tips on how to use Flexbox.
+$08. Create a responsive layout with CSS Grid
+$CSS Grid Layout is growing in browser support every day, and while it's not a replacement for Flexbox or even for floats, when used in combination with them it's a great way to create new and exciting responsive layouts.+$Follow this step-by-step guide+$to building a responsive portfolio site using Grid.
+$09. The web designer's guide to Flexbox
+$Have you started using Flexbox yet? In this tutorial Wes Bos provides a+$comprehensive Guide+$to the core concepts that will give you a solid understanding of everything you need to get to grips with this powerful tool.
+$10. Codrops Flexbox Reference
这个+$complete guide to Flexbox+$is written by Sara Soueidan, an author who is renowned for her ability to explain concepts in a way that's easy to follow without scrimping on detail. The Codrops guide is regularly updated so it's a great resource to return to when you need it.
+$11. Stacks: Flexbox for Sketch
+$Stacks, part of the Auto Layout plugin, provide a way for you to use Flexbox technology within Sketch, without using CSS.本文+$explains how you can make use of this powerful technique for easy responsive design.
+$12. A crash course in technical RWD
+$Writing on the Treehouse blog, Jerry Cao has condensed a lot of useful information into+$a relatively short, readable article。
+$13. Create flexible layouts with Susy and Breakpoint
+$If you don’t want to use a framework to build your responsive site,+$these Sass Extensions+$are a nice alternative, each with their own strengths. They’ll take care of the responsive maths for you so you can focus on design.
+$14. How to create responsive guides in Adobe XD
+$15. CSS at BBC Sport
+$This isn't a tutorial per se, but there's a lot of learning here.+$In This Post+$, the first of a two-part series, frontend developer Shaun Bent takes us on a detailed tour of how CSS is done at BBC Sport. They've managed to keep the CSS foundation of this massive site under 9kb, and it's fascinating to see how that's been done.
+$16. Sticky footer, five ways
+$Sticky footer... that should be simple enough, right? Unfortunately not. It can be trickier than you might expect to get that footer in the right place on every device. Luckily Chris Coyier has put together+$five Tricks+$that will help you to make it happen using计算值（），Flexbox，负边距和网格。
+$17. Adapting To Input
+$Responsive design isn’t just about making your page display properly on any device, you also have to make it function well – and that means it has to be good at accepting input in a world where desktops have touchscreens and phones have keyboards.本文+$by Jason Grigsby of Cloud Four has some sound advice.
+$18. Our best practices are killing mobile web performance
+$Applied without consideration, certain best practices that were conceived during the desktop era may have a detrimental effect on mobile web performance.本文+$will make you think more deeply about how you get your site to work well on mobile.
+$19. How to make responsive web apps with container queries
+$Learn how to transform a beautiful, complex web app – with components, states and interactions – across different dimensions and resolutions,+$using Container Queries。