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Learn about CSS units rem, em, px, vh, vw, percentage, and usage based on use cases.

55 days ago blog.saeloun.com css javascript

Understanding controlled and uncontrolled components in React

58 days ago blog.saeloun.com javascript react

Ruby 3.4, No More TypeError with **Nil as It Is Treated as an Empty Hash

4 months ago blog.saeloun.com hash ruby

ECMAScript - Grouping arrays using Object.groupBy and Map.groupBy

8 months ago blog.saeloun.com ecmascript javascript

Rails 7.1 Introduced Validate Option for Enums

8 months ago blog.saeloun.com rails

Understanding Generators, Iterators, and Iterator Helpers in JavaScript

9 months ago blog.saeloun.com javascript

Replace lodash.get method with optional chaining and nullish-coalescing operator

18 months ago blog.saeloun.com javascript

Ruby adds a new core Data class to represent immutable value objects

22 months ago blog.saeloun.com ruby

Ecma International approves ECMAScript 2022

2 years ago blog.saeloun.com ecmascript

React 18 adds onResize event to video elements

2 years ago blog.saeloun.com react video

Rails adds support for Fiber-safe ActiveRecord ConnectionPools

2 years ago blog.saeloun.com rails

ECMAScript 2022 introduces at() method in Array, String, TypedArray

2 years ago blog.saeloun.com ecmascript

Meet the new hook useSyncExternalStore, introduced in React 18 for external stores

2 years ago blog.saeloun.com react

React 18 provides useId API for generating unique IDs on both the client and server

2 years ago blog.saeloun.com api react

ECMAScript: Top-level await

2 years ago blog.saeloun.com ecmascript

Deep dive into public and private instance fields in JavaScript (ECMAScript 2022)

2 years ago blog.saeloun.com ecmascript javascript

Keep the React app responsive even during large screen updates with startTransition API introduced in React 18

3 years ago blog.saeloun.com api react

ECMAScript 2021(ES12) introduces Promise.any() and AggregateError

3 years ago blog.saeloun.com ecmascript

Rails 7 moves ActiveRecord::Base.logger to a class_attribute leading to a 7x speed improvement

3 years ago blog.saeloun.com rails

React 18 adds automatic batching

3 years ago blog.saeloun.com react

Babel 7.14 enables class fields & private methods by default in @babel/preset-env

3 years ago blog.saeloun.com

ES 12/2021 introduces new logical assignment operators

3 years ago blog.saeloun.com

React 17 runs useEffect cleanup functions asynchronously

3 years ago blog.saeloun.com react

Redux 4.1.0 converts error messages from strings to error code indexes

3 years ago blog.saeloun.com

React 17 internally uses the browser's focusin and focusout events for onFocus and onBlur events

3 years ago blog.saeloun.com react

React 17 adds support for KeyboardEvent.code property to SyntheticEvent

3 years ago blog.saeloun.com react

React 17 removes event pooling in the modern browsers

3 years ago blog.saeloun.com react

React 17 stops event bubbling in scroll event

3 years ago blog.saeloun.com react

Ruby adds experimental support for Rightward assignments

4 years ago blog.saeloun.com ruby

Ruby Lazy Enumerators

4 years ago blog.saeloun.com ruby