JS object life cycle management helper. Best used with Angular.
$ yarn add --dev lifestyle
This is typically used in angular application to avoid messing up your application code with explicit subscriptions and resource disposal calls.
import {lunsub, ldisposer, lstop} from "lifestyle";
// ... my component code
ngOnInit() {
// schedule .unsubscribe on passed object. For RxJS observables
lunsub(this, mystream$.subscribe(val => { ...}));
lunsub(this, otherstream$.subscribe(val => { ... }));
// lunsub supports many args
lunsub(this, a.subscribe(...), b.subscribe(...));
)
// call your own disposal code
ldisposer(this, () => { console.log('arbitrary disposer function' )})
// mobx autorun() follows the same protocol.
ldisposer(this, autorun( () => ... mobx autorun code ...);
}
ngOnDestroy() {
// this cleans up everything. You forget it, you leak stuff.
lstop(this);
}It stores all pushed disposers to in a WeakMap associated with passed "this". Full implementation is https://github.com/vivainio/lifestyle/blob/master/src/index.ts.
This is more convenient and harder to screw up than takeUntil(this.destroy$) pattern,
especially if you end up going to subscribe() anyway.
Size is ~ 500 bytes uncompressed, and there are no dependencies.
MIT. Copyright (c) 2019 by Ville M. Vainio vivainio@gmail.com