--- title: Back-end Guide, Next.js Free Course, CSS for Web Vitals - Picks 183 | daily.dev description: Learn JavaScript async execution, a new Next.js course it out, improve performance with CSS and more. Explore practical developer news, tutorials, and tools read by millions of developers worldwide. canonical: https://daily.dev/blog/back-end-guide-next-js-free-course-css-for-web-vitals-picks-183/ og:type: article og:url: https://daily.dev/blog/back-end-guide-next-js-free-course-css-for-web-vitals-picks-183/ og:title: Back-end Guide, Next.js Free Course, CSS for Web Vitals - Picks 183 | daily.dev og:description: Learn JavaScript async execution, a new Next.js course it out, improve performance with CSS and more. Explore practical developer news, tutorials, and tools read by millions of developers worldwide. og:image: https://media.daily.dev/image/upload/s--8_qDqgOl--/f_auto,q_auto/v1/recruiter-landing/60c06b87591ad57e26b77f16_Cover_a322320f38?_a=BAMAMiB80 og:site_name: daily.dev og:locale: en_US article:published_time: 2021-06-09 article:modified_time: 2026-05-15T14:25:33.104Z article:author: Ido Shamun twitter:card: summary_large_image twitter:site: @dailydotdev twitter:creator: @dailydotdev twitter:title: Back-end Guide, Next.js Free Course, CSS for Web Vitals - Picks 183 | daily.dev twitter:description: Learn JavaScript async execution, a new Next.js course it out, improve performance with CSS and more. Explore practical developer news, tutorials, and tools read by millions of developers worldwide. twitter:image: https://media.daily.dev/image/upload/s--8_qDqgOl--/f_auto,q_auto/v1/recruiter-landing/60c06b87591ad57e26b77f16_Cover_a322320f38?_a=BAMAMiB80 --- ## JavaScript Async/Await Tutorial – Learn Callbacks, Promises, and Async/Await in JS by Making Ice Cream 🍧🍨🍦 ❄️ This is a guide for JavaScript beginners who want to master the difference by sync and async execution. This guide contains tons of useful examples. - [JavaScript Async/Await Tutorial – Learn Callbacks, Promises, and Async/Await in JS by Making Ice Cream 🍧🍨🍦](https://app.daily.dev/posts/rHf7Y34_n) ## Microsoft’s new version of Windows will launch on June 24 🚀 We have a new Windows version coming soon. Microsoft will officially announce it on June 24 at 11 AM ET. - [Microsoft’s new version of Windows will launch on June 24](https://app.daily.dev/posts/MDCMRcjBj) ## The Front-end Developer's Guide to Back-end Development 📚 This tutorial explains the concepts of server-side development. It covers the basics of HTTP and how to write an Express app with Node.js. - [The Front-end Developer's Guide to Back-end Development](https://app.daily.dev/posts/kqxH0kSZz) ## Learn Next.js and Make React Development Simpler 🔥 A new course for beginners that will make you proficient with Next.js. You will learn how to connect it to a CMS, add automatic deployments with GitHub and Vercel, create dynamic routes, and more. - [Learn Next.js and Make React Development Simpler](https://app.daily.dev/posts/TC-6Il-b0) ## How to Find and Remove Dead CSS 🧐 Finding unused CSS code is, by all means, a difficult task. This video will show you how to unveil unused selectors so you can keep your CSS files lean. - [How to Find and Remove Dead CSS](https://app.daily.dev/posts/ibT8dSxh3) ## GitLive - Extend Git with real-time collaborative superpowers 🦸‍♂️ GitLive is a new product that helps developers work together in real-time. It's an IDE extension that even allows you to do a video call with the person who last changed a specific line of code. - [GitLive - Extend Git with real-time collaborative superpowers](https://app.daily.dev/posts/eYdyKd4_o) ## Front-End Testing is For Everyone 🤖 An extensive guide to front-end testing. It covers the different types of testing along with the right tools for the job. Definitely worth your time. - [Front-End Testing is For Everyone](https://app.daily.dev/posts/nIo6nZXNy) ## Code blocks, but better 🧱 The author shares his journey of building better code blocks for his documentation. He shares his specs along with the implementation and the challenges. - [Code blocks, but better](https://app.daily.dev/posts/qN5R227bZ) ## Nice avatar - React component for generating avatars 🤩 Easily generate custom avatars for your website with this new React component. - [Nice avatar - React component for generating avatars](https://app.daily.dev/posts/zlVMKmD5W) ## CSS for Web Vitals 🏎 CSS can have a drastic impact on the performance of your website. Learn how to use CSS correctly to improve it and ace the Lighthouse test. - [CSS for Web Vitals](https://app.daily.dev/posts/a1Sw38TiZ) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/og-image.png?v=a830cdf1","width":1200,"height":630},"sameAs":["https://twitter.com/dailydotdev","https://www.linkedin.com/company/dailydotdev","https://github.com/dailydotdev","https://www.instagram.com/dailydotdev"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","description":"Free, personalized developer news aggregator. 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