Lucas Azzola 99be60b53d Implement transform for nullish-coalescing operator (#6483)
* Implement transform for nullish-coalescing operator

* Update example output

* Switch from BinaryExpression to LogicalExpression

* Address review comments

- Use generateUidIdentifierBasedOnNode
- Inline "??"
- Clone ref node
- Move "??" to LogicalExpression in babel-types

* Fix reference to @babel/helper-plugin-test-runner

* Fix reference to @babel/plugin-syntax-nullish-coalescing-operator

* Don't use parent scope

* Remove .vscode from .gitignore, change 'lib/index.js' to 'lib'

* Ensure `document.all ?? 0 === document.all`

* Fix note and copy to an inline comment
2017-10-18 03:10:05 -04:00

36 lines
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Markdown

# @babel/plugin-syntax-nullish-coalescing-operator
> Allow parsing of the nullish-coalescing operator.
## Installation
```sh
npm install --save-dev @babel/plugin-syntax-nullish-coalescing-operator
```
## Usage
### Via `.babelrc` (Recommended)
**.babelrc**
```json
{
"plugins": ["syntax-nullish-coalescing-operator"]
}
```
### Via CLI
```sh
babel --plugins syntax-nullish-coalescing-operator script.js
```
### Via Node API
```javascript
require("babel-core").transform("code", {
plugins: ["syntax-nullish-coalescing-operator"]
});
```