feat: svelte query client (#683)Co-authored-by: Sergiy Petrunin <spetrunin@users.noreply.github.com> Co-authored-by: Eelco Wiersma <contact@pagebakers.nl> Co-authored-by: Pagebakers <eelco@appulse.nl>

[DaniAkash]

This PR is a draft of my initial implementation of Wundergraph Client for sveltekit, created to collect feedback from the maintainers of this project. There's still few pending items I need to address before this PR can be ready:

• figure out how to create subscription utilities in svelte
• setup tests for the svelte query client utilities
  • subscriptions broken - need to work on a fix
• move Wundergraph Client for sveltekit into examples

Checklist

• run make test
• PR title must follow conventional-commit-standard
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Code of conduct

[vercel]

@DaniAkash is attempting to deploy a commit to the WunderGraph Team on Vercel.

A member of the Team first needs to authorize it.

[Pagebakers]

Great work! is there anything you need help with?

[DaniAkash]

Great work! is there anything you need help with?

The subscription test cases are failing. Might need some help with it.

[DaniAkash]

Since I'm new to svelte, I might have made some mistakes in the readable store implementation. Will try to figure out the issue

[Pagebakers]

Thanks, I will try it out once I have the time.

[DaniAkash]

Thanks, I will try it out once I have the time.

It is fixed now. All tests are passing 🎉

[Pagebakers]

Great overall! Left some comments for improvements.

Will you also add a svelte/sveltekit example?

[DaniAkash]

Great overall! Left some comments for improvements.

Will you also add a svelte/sveltekit example?

@Pagebakers would like your review on the derived state implementation for subscriptions. If it looks good, I'll work on improving the types

[Pagebakers]

Code looks good, but I'm unable to run the tests locally. (with CI it's expected not to work)

 FAIL  tests/queryUtils.test.ts (8.807 s)
  Svelte Query - createSvelteClient
    ✓ should be able to init utility functions (1 ms)
    ✕ should return data (1035 ms)
    ✓ should be disabled (182 ms)
  Svelte Query - createMutation
    ✓ should trigger mutation with auth (17 ms)
    ✓ should trigger mutation (8 ms)
    ✕ should invalidate query (1010 ms)
  Svelte Query - createSubscription
    ✕ should subscribe (5006 ms)
  Svelte Query - getUser
    ✕ should return user (1021 ms)
    ```