how to use the animationframes function from the rxjs library in typescript

To use the animationFrames function from the rxjs library in TypeScript, you first need to import it from the library.

index.ts
import { animationFrames } from 'rxjs/internal/scheduler/animationFrames';
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Once you have imported the function, you can use it to create an Observable that emits the elapsed time between animation frames.

index.ts
const animationFrames$ = animationFrames();

animationFrames$.subscribe((time) => console.log(time));
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The callback function in the subscribe method will be called on each animation frame, and will receive the elapsed time since the last frame as an argument.

You can also use RxJS operators like map, filter, scan, etc. to transform the values emitted by the animationFrames Observable.

index.ts
import { animationFrames } from 'rxjs/internal/scheduler/animationFrames';
import { map } from "rxjs/operators";

const animationFrames$ = animationFrames();

animationFrames$.pipe(
  map((time) => time / 1000) // convert milliseconds to seconds
).subscribe((time) => console.log(time));
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In this example, the map operator is used to convert the elapsed time from milliseconds to seconds before logging it to the console.