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JS

Topics and Concepts

key differences between const, let, and var in JavaScript:
Scope

    var has function scope or global scope
    let and const have block scope (within {})

Hoisting

    var variables are hoisted and initialized with undefined
    let and const are hoisted but not initialized, resulting in a "Temporal Dead Zone"

Reassignment

    var and let variables can be reassigned
    const variables cannot be reassigned

Redeclaration

    var variables can be redeclared in the same scope
    let variables cannot be redeclared in the same scope
    const variables cannot be redeclared in the same scope

Initialization

    var and let can be declared without initialization
    const must be initialized upon declaration

In summary, const provides the most restrictions, followed by let, while var is the most flexible but also the most error-prone. The general recommendation is to use const by default, and only use let when you need to reassign a variable. var should be avoided in modern JavaScript developmen

Sourcemap

https://esbuild.github.io/api/#sourcemap

Callbacks

https://lenguajejs.com/javascript/asincronia/callbacks/

Dynamic module loading

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules#dynamic_module_loading

CJS, AMD, UMD, and ESM

https://dev.to/iggredible/what-the-heck-are-cjs-amd-umd-and-esm-ikm

  • CJS does not work in the browser, browsers uses ES.

Tooling

Rust tools:

Pro: The Biome eco is amazing!

https://github.com/biomejs/biome

https://github.com/oxc-project/oxc

Bundlers

A bundler is a development tool
that combines many JavaScript code files
into a single one that is production-ready
loadable in the browser.

https://snipcart.com/blog/javascript-module-bundler#top-5-javascript-module-bundlers

https://esbuild.github.io/

https://turbo.build/

Compression

https://swc.rs/playground

** Brotli vs. GZIP vs. Zopfli **

https://dev.to/codingcrafts/brotli-vs-gzip-vs-zopfli-comparing-javascript-compression-techniques-1fo2

JSDoc

https://jsdoc.app/index.html

https://jsdoc.app/about-getting-started.html

https://codedamn.com/news/javascript/the-benefits-of-using-jsdoc-for-commenting-your-javascript-code

eslint

https://eslint.org/

Personal configs
https://eslint.org/docs/latest/use/configure/configuration-files#personal-configuration-files-deprecated

ES6

https://www.sitepoint.com/understanding-es6-modules/#usinges6modulesinnodejs

https://hacks.mozilla.org/2015/08/es6-in-depth-modules/

To use modules today, you’ll need a compiler such as Traceur or Babel

https://nodejs.org/docs/latest/api/esm.html#esm_differences_between_es_modules_and_commonjs

https://stackoverflow.com/questions/57492546/what-is-the-difference-between-js-and-mjs-files

Compilers

https://babel.dev/

https://github.com/google/traceur-compiler

Logging

https://github.com/pinojs/pino

Dates

https://github.com/moment/luxon/

https://day.js.org

https://github.com/moment/moment

Others

Embedded JavaScript templates

https://github.com/mde/ejs

Async utilities for node and the browser

https://github.com/caolan/async

Financial Charts

https://github.com/tradingview/lightweight-charts

https://lit.dev/

https://github.com/eslint/eslint.git

https://github.com/nolimits4web/Swiper

Communities and conferences

https://js13kgames.com/

https://risingstars.js.org/