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# @babel/plugin-transform-react-jsx-source
> Adds source file and line number to JSX elements.
## Example
**In**
```
<sometag />
```
**Out**
```
<sometag __source={ { fileName: 'this/file.js', lineNumber: 10 } } />
```
## Installation
```sh
npm install --save-dev @babel/plugin-transform-react-jsx-source
```
## Usage
### Via `.babelrc` (Recommended)
**.babelrc**
```json
{
"plugins": ["@babel/plugin-transform-react-jsx-source"]
}
```
### Via CLI
```sh
babel --plugins @babel/plugin-transform-react-jsx-source script.js
```
### Via Node API
```javascript
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-transform-react-jsx-source"]
});
```