Japanese conjugation practice application

An app for practicing conjugating Japanese verbs based on JLPT level and grammar point.

Features

Choose verbs by JLPT Level (constantly updating)
Choose grammar point (past tense, potential form, passive form etc.)
Text input automatically changes to Hiragana so no need to change input settings
Verb changes when correct when pressing space, allows for rapid practice
Call Jisho API with Express to get verbs based on JLPT level
Stores data to cache to help with loading times and to reduce API calls
Loading screen shows while data is loading

Battled with whether or not to call all JLPT data at once or based on selected level
Creating the logic for checking each grammar point
Learned a lot about promises
Struggled with learning how to get the grammar point component to generate a new answer without refs. Once an answer has been correctly inputted, refreshRequired changes to 'true' which calls another word from the grammarPoint component
Issues with deploying to Heroku because of unlisted dependencies
A lot of tightly-coupled components that need reworking

Potential form only accepts grammatically correct masu stem + られる　but will update in the future to add colloquial but largely accepted masu stem + れる
Imperative form accepts the common 'verbal conjugation'. Please see the below table. Will potentially add other conjugations in the future

English	Dictionary Form	Verbal	Literary	なさい
To eat	食べる	食べろ	食べよ	食べなさい
To see	見る	見ろ	見よ	見なさい
To disappear	消える	消えろ	消えよ	消えなさい

Some conjugations are a little strange, but this app is more for creating muscle memory over vocabulary study. For example: The te form of 曇る (曇って) would seldom be used in conversation...