Fill keys in a destination that are defined on the source. Copies descriptors so properties like enumerable will persist.

$ npm install --save fill-keys

var fillKeys = require('fill-keys');

fillKeys(destination, source);
//=> missing destination keys in source are copied

fill-keys will copy descriptors. It will also copy the source.prototype properties onto destination.prototype if both destination and source are functions.

Required
Type: any

The destination object where keys from source will be added.

Required
Type: any

The source object from which to copy properties.

An ES3-compatible version of fillKeys. Behavior is identical but simple assignment is used instead of Object.defineProperty.

MIT © Ben Drucker