forked from M3-Academy/challenge-algorithms-v2.0
26 lines
825 B
Markdown
26 lines
825 B
Markdown
|
# babel-jest
|
||
|
|
|
||
|
|
[Babel](https://github.com/babel/babel) [jest](https://github.com/facebook/jest) plugin
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
If you are already using `jest-cli`, add `babel-jest` and it will automatically compile JavaScript code using Babel.
|
||
|
|
|
||
|
|
```bash
|
||
|
|
yarn add --dev babel-jest @babel/core
|
||
|
|
```
|
||
|
|
|
||
|
|
If you would like to write your own preprocessor, uninstall and delete babel-jest and set the [config.transform](https://jestjs.io/docs/configuration#transform-object-string-string) option to your preprocessor.
|
||
|
|
|
||
|
|
## Setup
|
||
|
|
|
||
|
|
_Note: this step is only required if you are using `babel-jest` with additional code preprocessors._
|
||
|
|
|
||
|
|
To explicitly define `babel-jest` as a transformer for your JavaScript code, map _.js_ files to the `babel-jest` module. Typescript files are also supported.
|
||
|
|
|
||
|
|
```json
|
||
|
|
"transform": {
|
||
|
|
"\\.[jt]sx?$": "babel-jest"
|
||
|
|
},
|
||
|
|
```
|