Babel plugin that rewrites Promise references to es6-promise, but only if necessary
npm install babel-plugin-es6-promiseBabel plugin that rewrites Promise references to [es6-promise], but only if
necessary. Tested with Node.js 0.10 and above.
``console`
$ npm install --save-dev babel-plugin-es6-promise
Then add es6-promise to your Babel config, like:
`json`
{
"plugins": ["es6-promise"]
}
[es6-promise] must be installed separately.
This plugin rewrites files that reference the Promise built-in. It inserts the
following code at the top of each file:
`js`
var _Promise = typeof Promise === 'undefined'
? require('es6-promise').Promise
: Promise
This means [es6-promise] is only loaded when there is no Promise built-inPromise
available. Each reference is rewritten to _Promise.
Note that require() is used rather than a ES2015 module import. This may make
it difficult to do further import transforms.
Also note that the _Promise variable name in this example is determined by
Babel and may differ depending on your code.
[es6-promise`]: https://github.com/stefanpenner/es6-promise