Svelte Query is now written in TypeScript to make sure the library and your projects are type-safe!
Things to keep in mind:
- Types currently require using TypeScript v3.8 or greater
- Changes to types in this repository are considered non-breaking and are usually released as patch semver changes (otherwise every type enhancement would be a major version!).
- It is highly recommended that you lock your svelte-query package version to a specific patch release and upgrade with the expectation that types may be fixed or upgraded between any release
- The non-type-related public API of Svelte Query still follows semver very strictly.
Defining Custom Hooks
When defining a custom hook you need to specify the result and error types, for example:
const queryResult = useQuery<Group, Error>('groups', fetchGroups)