jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

minor fixes

Browse source
This commit is contained in:
Ilya Kantor 2020-12-06 17:36:59 +03:00
parent f30b4f2f7d
commit 68dfa95daa
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
1-js/03-code-quality/06-polyfills/article.md
View file

@ -24,9 +24,9 @@ Here, in this chapter, our purpose is to get the gist of how they work, and thei
A [transpiler](https://en.wikipedia.org/wiki/Source-to-source_compiler) is a special piece of software that can parse ("read and understand") modern code, and rewrite it using older syntax constructs, so that the result would be the same.
E.g. JavaScript before year 2020 didn't have the "nullish coalescing operator" `??`. So, if the visitor uses an outdated browser, it may fail to understand the code like `height = height ?? 100`.
E.g. JavaScript before year 2020 didn't have the "nullish coalescing operator" `??`. So, if a visitor uses an outdated browser, it may fail to understand the code like `height = height ?? 100`.
A transpiler would analyze our code and rewrite `height ?? 100` as `(height !== undefined && height !== null) ? height : 100`.
A transpiler would analyze our code and rewrite `height ?? 100` into `(height !== undefined && height !== null) ? height : 100`.
```js
// before running the transpiler