json-q
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Retrieves values from JSON objects (and JavaScript objects) by css-selector-like query (includes attribute filters and array flattening).
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# modify-babel-preset
[](http://npm.im/modify-babel-preset)
[](http://npm.im/modify-babel-preset)
[](https://travis-ci.org/developit/modify-babel-preset)
Create a modified babel preset based on an an existing preset.
> Works best with `npm 3`.
```sh
npm i -S modify-babel-preset
```
- [API](#api)
- [Add/Update Plugins](#addupdate-plugins)
- [Remove Plugins](#remove-plugins)
- [Example](#example)
---
## API
A single function that takes an existing preset name and a mapping of plugin modifications to apply to that preset. _Make sure you have the preset and any added plugins installed as dependencies._
```js
newPreset = modifyBabelPreset(
'existing-preset-name',
{
'plugin-name': false, // remove
'other-plugin': true, // add
'foo': { loose:true } // add + config
}
);
```
> Modification keys are babel plugin names _(you can exclude the `babel-plugin-` prefix)._
### Add/Update Plugins
To add a plugin, pass `true`, or a configuration object:
```js
{
// just add a plugin without config:
'plugin-name': true,
// add a plugin and set its config
'other-plugin': { loose:true }
}
```
> **Note:** adding a plugin that is already provided by the preset just overwrites its configuration.
### Remove Plugins
To remove a plugin, pass `false`:
```js
{
'plugin-name': false
}
```
## Example
Here's a simple preset. Just this `index.js` and a package.json pointing to it with the preset and plugin installed as dependencies.
```js
var modifyBabelPreset = require('modify-babel-preset');
// just export the cloned, modified preset config:
module.exports = modifyBabelPreset('es2015', {
// remove the typeof x==='symbol' transform:
'transform-es2015-typeof-symbol': false,
// add the JSX transform:
'transform-react-jsx': true
});
```