npm i string-tokeniser
import { fit } from 'string-tokeniser'
console.log(fit(['hello world', 'how are you?']))
{
indexWord: { '1': 'hello', '2': 'world', '3': 'how', '4': 'are', '5': 'you' },
wordIndex: { hello: '1', world: '2', how: '3', are: '4', you: '5' },
wordCounts: { hello: 1, world: 1, how: 1, are: 1, you: 1 },
sequences: [ [ 1, 2 ], [ 3, 4, 5 ] ]
}
MIT