Babel (transcompiler)

From Wikipedia, the free encyclopedia
Original author(s)Sebastian McKenzie
Initial releaseSeptember 28, 2014; 9 years ago (2014-09-28)[1]
Stable release
7.23.8 / January 8, 2024; 4 months ago (2024-01-08)[2]
Written inJavaScript
Operating systemLinux, macOS, Solaris, FreeBSD, OpenBSD, AIX, Microsoft Windows

Babel is a free and open-source JavaScript transcompiler that is mainly used to convert ECMAScript 2015+ (ES6+) code into backwards-compatible JavaScript code that can be run by older JavaScript engines. It allows web developers to take advantage of the newest features of the language.[4]

Developers can use new JavaScript language features by using Babel to convert their source code into versions of JavaScript that a Web browser can process.[5] Babel can also be used to compile TypeScript into JavaScript.[6] The core version of Babel was downloaded 5 million times a month in 2016, and this increased to 16 million times a week in 2019.[7][8]

Babel plugins transform syntax that is not widely supported into a backward-compatible version. For example, arrow functions, which are specified in ES6, are converted into regular function declarations.[9] Non-standard JavaScript syntax such as JSX can also be transformed.[10][11]

Babel can automatically inject polyfills provided by core-js[12] for support features that are missing entirely from JavaScript environments. For example, static methods such as Array.from and built-ins such as Promise are available only in ES6 and above, but they can be used in older environments if core-js is used.

See also[edit]


  1. ^ "first commit". Babel Github. Retrieved 2021-01-26.
  2. ^ "Babel Latest Release". GitHub. Retrieved 23 January 2024.
  3. ^ "babel/LICENSE at master". GitHub. Retrieved 12 May 2018.
  4. ^ "Technology Radar | Emerging Technology Trends for 2017 | ThoughtWorks". Retrieved 2018-05-12.
  5. ^ "Why Babel Matters | codemix". Retrieved 2018-05-12.
  6. ^ Using Babel with TypeScript, TypeScript official website
  7. ^ "The State of Babel · Babel". Retrieved 2018-05-12.
  8. ^ "Babel's Funding Plans · Babel". Retrieved 2020-08-01.
  9. ^ "Plugins · Babel". Retrieved 5 July 2019.
  10. ^ "Introducing JSX - React". Retrieved 2018-05-12.
  11. ^ "Using React and building a web site on Azure". Microsoft Faculty Connection. Retrieved 2018-05-12.
  12. ^ "core-js". GitHub.

External links[edit]