DEV Community

Cover image for JS Versialar haqida ma'lumot
Muhiddin Azizqulov
Muhiddin Azizqulov

Posted on

JS Versialar haqida ma'lumot

#jsversions
  • ECMAScript 1 (ES1) - 1997 yil

Birinchi versiya bo'lib, asosiy sintaksis va xususiyatlar joriy etilgan.

  • ECMAScript 2 (ES2) - 1998 yil

Asosan ES1-ga kichik tuzatuvlar va moslik yangilanishlarini kiritgan

  • ECMAScript 3 (ES3) - 1999 yil

ES3 katta yangilanish bo'lib, oddiy qatorlar, izlanish va almashtirish funktsiyalari, maxsus tartiblash (sorting) va boshqalarni qo'shdi.

  • ECMAScript 4 (ES4)

ES4 hech qachon rasmiy ravishda chiqarilmagan, chunki ishlab chiqish jarayonida ko'plab muammolar va kelishmovchiliklar yuzaga keldi.

  • ECMAScript 5 (ES5) - 2009 yil

Bu versiya keng qamrovli yangilanish bo'lib, quyidagilarni o'z ichiga oladi:

1. Qat'iy rejim ("strict mode")
2. JSON ob'ekt
3. Array.isArray, Function.bind kabi yangi funktsiyalar
4. Har xil array metodlar (forEach, map, filter, reduce)
5. Property attribute'larini boshqarish
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 6 (ES6) / ECMAScript 2015

Bu versiya JavaScript tiliga eng katta yangilanishlardan biri hisoblanadi:

1. Blok darajasidagi o'zgaruvchilar (let, const)
2. Arrow funktsiyalar
3. Sinflar (class)
4. Modullar (import, export)
5. Promises
6. Template literals
7. Default, rest va spread parametrlari
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2016 (ES7)

Bu versiyada nisbatan kamroq yangilanishlar bor edi:

1. Array.prototype.includes
2. Exponentiation operatori (**)
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2017 (ES8)

Ushbu versiya quyidagi xususiyatlarni kiritdi:

1. Async/Await
2. Object.values va Object.entries
3. String padding (padStart, padEnd)
4. Object.getOwnPropertyDescriptors
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2018 (ES9)

Bu versiyada quyidagilar mavjud:

1. Asynchronous iteration (for-await-of)
2. Rest/Spread properties
3. Promise.finally
4. Regular Expression enhancements
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2019 (ES10)

Bu versiyada quyidagilar mavjud:

1. Array.prototype.flat, Array.prototype.flatMap
2. Object.fromEntries
3. String.prototype.trimStart, String.prototype.trimEnd
4. Optional catch binding
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2020 (ES11)

Bu versiyada quyidagilar mavjud:

1. BigInt
2. Dynamic import
3. Nullish Coalescing (??)
4. Optional Chaining (?.)
5. Promise.allSettled
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2021 (ES12)

Bu versiyada quyidagilar mavjud:

1. Logical assignment operators (&&=, ||=, ??=)
2. Numeric separators
3. String.prototype.replaceAll
4. WeakRefs
Enter fullscreen mode Exit fullscreen mode
  • ECMAScript 2022 (ES13)

Yangi xususiyatlar:

1. Top-level await
2. Private instance fields
3. Static class fields
4. RegExp match indices
Enter fullscreen mode Exit fullscreen mode

Top comments (0)

Read next

ben profile image

Definitely need to add linking to quickie posts, just need to do it in the right way. Probably start with linking to DEV posts as a way to share and boost stuff you like a bit more easily.

Ben Halpern -

vaishnavi_sonawane profile image

🪝Mastering React Hooks Transform Your React Development with Hooks🚀

Vaishnavi Sonawane -

nozibul_islam_113b1d5334f profile image

Understanding SharedArrayBuffer in Simple Terms

Nozibul Islam -

carrie_luo1 profile image

What's New in Open Source WAF, SafeLine V7.2.3?

Carrie -