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@ -9,13 +9,13 @@ So it's quite common for an engine to implement only the part of the standard.
A good page to see the current state of support for language features is <https://kangax.github.io/compat-table/es6/> (it's big, we have a lot to study yet). A good page to see the current state of support for language features is <https://kangax.github.io/compat-table/es6/> (it's big, we have a lot to study yet).
## Babel.JS ## Babel
When we use modern features of the language, some engines may fail to support such code. Just as said, not all features are implemented everywhere. When we use modern features of the language, some engines may fail to support such code. Just as said, not all features are implemented everywhere.
Here Babel.JS comes to the rescue. Here Babel comes to the rescue.
[Babel.JS](https://babeljs.io) is a [transpiler](https://en.wikipedia.org/wiki/Source-to-source_compiler). It rewrites modern JavaScript code into the previous standard. [Babel](https://babeljs.io) is a [transpiler](https://en.wikipedia.org/wiki/Source-to-source_compiler). It rewrites modern JavaScript code into the previous standard.
Actually, there are two parts in Babel: Actually, there are two parts in Babel:
@ -33,7 +33,7 @@ Actually, there are two parts in Babel:
So, we need to setup the transpiler and add the polyfill for old engines to support modern features. So, we need to setup the transpiler and add the polyfill for old engines to support modern features.
If we orient towards modern engines and do not use features except those supported everywhere, then we don't need to use Babel.JS. If we orient towards modern engines and do not use features except those supported everywhere, then we don't need to use Babel.
## Examples in the tutorial ## Examples in the tutorial