I'm a bit confused about ES6 and ES2015. In TypeScript, there are two type declarations available for them: lib.es6.d.ts and lib.es2015.d.ts. Can someone explain the difference between these two? And which one is recommended to use?
I'm a bit confused about ES6 and ES2015. In TypeScript, there are two type declarations available for them: lib.es6.d.ts and lib.es2015.d.ts. Can someone explain the difference between these two? And which one is recommended to use?
ES6 and ES2015 are essentially the same thing. In TypeScript, the target option as well as libraries with the same names are expected to function similarly - which they do.
lib.d.ts and lib.es6.d.ts are library files that build on each other. They are created from a compilation of various other libraries, some of which can be found here:
The files within this directory are used to generate lib.d.ts and lib.es6.d.ts.
These files include specific spec libraries along with the DOM library.
The distinction between lib.es6.d.ts and lib.es2015.d.ts is that the former is automatically included when the target is set to ES6, whereas the latter is used in conjunction with the lib being set to ES6. Meaning, specifying --target ES6 is equivalent to
--target ES6 --lib ES6,DOM,DOM.Iterable,ScripthostThe ES2015 library offers more granularity, allowing for the substitution of ES6 or ES2015 with a subset of features when needed: such as ES2015.Core, among others.
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