Unmount check

[promer94]

No description provided.

[promer94]

Currently, the pre-commit hooks script is broken

tsc --noEmit
node_modules/jest-diff/build/diffLines.d.ts:8:13 - error TS1005: '=' expected.

8 import type { DiffOptions } from './types';
              ~

node_modules/jest-diff/build/diffLines.d.ts:8:34 - error TS1005: ';' expected.

8 import type { DiffOptions } from './types';
                                   ~~~~~~~~~

node_modules/jest-diff/build/index.d.ts:10:13 - error TS1005: '=' expected.

10 import type { DiffOptions } from './types';
               ~

node_modules/jest-diff/build/index.d.ts:10:34 - error TS1005: ';' expected.

10 import type { DiffOptions } from './types';
                                    ~~~~~~~~~

node_modules/jest-diff/build/index.d.ts:11:1 - error TS1128: Declaration or statement expected.

11 export type { DiffOptions, DiffOptionsColor } from './types';
   ~~~~~~

node_modules/jest-diff/build/index.d.ts:11:13 - error TS1005: ';' expected.

11 export type { DiffOptions, DiffOptionsColor } from './types';
               ~

node_modules/jest-diff/build/index.d.ts:11:52 - error TS1005: ';' expected.

11 export type { DiffOptions, DiffOptionsColor } from './types';
                                                      ~~~~~~~~~

node_modules/jest-diff/build/printDiffs.d.ts:8:13 - error TS1005: '=' expected.

8 import type { DiffOptions, DiffOptionsNormalized } from './types';
              ~

node_modules/jest-diff/build/printDiffs.d.ts:8:57 - error TS1005: ';' expected.

8 import type { DiffOptions, DiffOptionsNormalized } from './types';
                                                          ~~~~~~~~~
Found 9 errors.

need to upgrade Typescript to support import type { xxx } from 'xxx'

[shuding]

Thank you @promer94 for working on this!

I think it's a good chance to refactor these handlers to event emitters:
callbacksRef.current.onLoadingSlow(...args) → eventsRef.current.emit('onLoadingSlow', ...args)

So we don't need to implement every method inside callbacksRef, and it will be more flexible in the future.

eventsRef = useRef({
  emit: (event, ...args) => {
    if (unmounted) return
    config[event](...args)
  }
})

[shuding]

Code looks good, thank you @promer94 (also appreciate the tests)!

[thoamsy]

why not use useMemo in here, no reference scene

[huozhi]

@thoamsy useMemo is more like to use for recalculation when deps changed.
for the events trigger, the refer here is just creating an object which is never changed during renders, without any deps required. so I feel ref is more proper for this case : )