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Rails for Front-end Development: Essential Tools

Dealing with Strictness

Explore techniques to manage strict typing in TypeScript within Rails projects. Understand how to handle potential undefined values, fix common errors in controllers and debounce methods, and improve code reliability by preventing runtime issues through robust type validation.

We'll cover the following...

Current errors

In compiling the file (venue-display), we receive several errors:

  • The venue-display file that kicks off the call to React does not handle a potentially undefined value.
  • The SortController does a parseInt with a potentially null value.
  • The debounce method in SearchController is nonfunctional and we’ll need to restructure that.
  • The CalendarController has a few cases where we use the target.dataset.
  • The thunk dispatches in App are incompatible with any potential null values.

Fixing the Errors

Using other strict options would give us more errors. In particular, the “no explicit any” might be a problem, but this should be enough for us to deal with to get the idea.

Our venue_display file has essentially the same issue four times over. That is, we have ...