Created
December 3, 2018 13:42
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Quick and dirty RxJS 5 animation interpolator
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| function createTransition$(start, duration=1000, interval=250, interpolator=linear) { | |
| const ticks = duration / interval | |
| let current = start | |
| const to$ = new Subject() | |
| const out$ = to$.switchMap( | |
| t => { | |
| const int = interpolator(current, t) | |
| return Observable.interval(interval).take(ticks).map(t => (t + 1)/ticks) | |
| .startWith(0) | |
| .map(int) | |
| .do(v => current = v) | |
| } | |
| ) | |
| return Subject.create(to$, out$) | |
| } | |
| a$ = createTransition$(10, 2000, 500, linear) | |
| if (s) | |
| s.unsubscribe() | |
| s = a$.subscribe(log('FINAL')) | |
| a$.next(100) | |
| function linear(from, to) { | |
| return i => (to - from) * i + from | |
| } | |
| function log(label) { | |
| return { | |
| next: n => console.log(`%cN ${label}>`, 'color: green', n), | |
| error: e => console.log(`%cE ${label}>`, 'color: orange', e), | |
| complete: () => console.info(`%cC ${label}>`, 'color: blue') | |
| } | |
| } |
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