https://petercollingridge.appspot.com/svg-optimiser

This is another great free online SVG optimization tool that can be used to trim SVG code, It's intuitive and easy to use.

Animation Library

Animation is everywhere on the web, whether it’s subtle micro-effects or the story-telling movement of large chunks of content gradually unfolding on the screen. animation exists.

While modern CSS and JavaScript include the functionality you need to create some cool web animations, the libraries listed below are sure to get you done faster and Get some amazing effects.

Animate.css

https://animate.style/

Animate.css is a ready-to-use cross-browser animation library for use in your web projects. Great for highlights, homepages, sliders and attention-grabbing cues.

As the name suggests, this library is pure CSS. Among the prepackaged effects, you'll find: eye-catching effects like bounce and flicker, rear entrance and exit, fade in and out, and tons of other effects.

Features include:

• Quick installation using npm, Yarn or CDN
• Easy and simple to use
• Options to customize animation duration, delay and interaction using CSS custom properties (CSS variables)
• For delay , speed change and repetition utility classes.

GreenSock (GSAP)

https://greensock.com/

GSAP (GreenSock Animation Platform) provides "ultra-high performance, professional-grade animation for the modern web".

Its highly intuitive JavaScript-driven syntax allows you to build stunning animations in no time. From DOM elements and JavaScript objects to SVG, Canvas and WebGL immersive experiences, there are no limits to what can be animated using GSAP. Additionally, GSAP is cross-browser and backwards compatible, and offers excellent documentation and a support community.

Anime.js

https://animejs.com/

Anime.js is a lightweight JavaScript animation library with a simple and powerful API. It works with CSS properties, SVG, DOM properties and JavaScript objects.

Completely open source, with its intuitive syntax and excellent documentation, you can get up and running with Anime.js right away.

Cross-browser testing

Developers have no control over which device their website or application is accessed from. In 2019, more than half of all web traffic came from mobile devices. Across the board, screen sizes vary from desktops and tablets to smartphones and wearable technology. As front-end developers, ensuring that web pages work on any screen size is a core part of our job. While there's nothing like testing websites and apps directly on different browsers and platforms, covering all the bases in this way isn't an option for most of us. The services and apps listed below can help. Caniuse

https://caniuse.com/

I don’t I know what you are thinking, but when I need the latest information on browser support for any HTML, CSS, SVG and JavaScript feature - no matter how new or obscure - caniuse is my go-to site.

You will get the latest statistical results at global and country-specific levels, as well as information on specific issues, resources, and more.

Am I Responsive?

http://ami.responsivedesign.is/

This is a free online application that allows you to quickly check how your website will look on different screen sizes.

Here is the list of features:

You can do this by entering the URL of the site you want to test into the text box, or from any Places use the "Am I RWD" bookmark on your browser to use the app from within the app's website.

http://localhost/ works.
Click and scroll to test on every device your site is displayed on.
Responsive Web Design Checker

##https://responsivedesignchecker.com/

BrowserStack

https://www.browserstack.com/

BrowserStack is a popular paid service that allows you to browse on over 2000 real devices and browsers Test your website or app on . It's completely safe right out of the box.

Code Collaboration and Playground

Here are some great tools that allow you to quickly share code, prototype and test project ideas.

GitHub

No need to say more

CodePen

https://codepen.io/

CodePen has been around for many years and is loved and widely used by the front-end developer community, it is great for trying out concepts, prototyping, learning Coding and code sharing. It is defined by its team as follows:

CodePen is a social development environment. Essentially, it allows you to write code in the browser and see its results as it builds. This is a useful and free online code editor for developers of any skill, and is especially empowering for people learning to code. We mainly focus on front-end languages ​​such as HTML, CSS, JavaScript and preprocessing syntax that can be transformed into these.

JSFiddle

https://jsfiddle.net/

JSFiddle Yes An online IDE service and online community for testing and displaying user-created and collaborative HTML, CSS, and JavaScript code snippets, known as "fiddles." It allows to simulate AJAX calls. In 2019, JSFiddle ranked second globally and in the United States based on the number of searches on the Programming Language (PYPL) Popularity Index, directly behind Cloud9 IDE, becoming the most popular online IDE.

SoloLearn

https://www.sololearn.com/

SoloLearn is a great online playground that allows you to test HTML, CSS and JavaScript code. It also offers basic coding courses for free, as well as forums for developers and learners.

jsrun.net

https://jsrun.net/

This is a domestic version of CodePen, highly recommended! Although Codepen and JSFiddle are good, they are very slow because the server is abroad. And jsrun.net is very fast.