---
title: "Property tweens: API"
package: "@phaser-ae/tween"
tier: Free
version: 3.0.0-3
released: 2026-10-14
updated: 2026-10-20
description: "Animates any number or hex colour on any object over time, with easing, delays, loops and yoyo, on the fixed clock so it pauses and replays with the game."
url: https://phaser.io/packs/tween/api
site: Phaser - https://phaser.io
---

# Property tweens: API

`@phaser-ae/tween` — Property animation on the fixed clock, with easing, delay, loop and yoyo; a later tween takes the property over, so re-aiming one mid-flight is the retarget.

## The pack

### `tween`

```ts
function tween(): Pack<{ tween: TweenApi }>
```

The tween pack: `game.tween`, a simulate step before `physics-2d`, scene-owned tweens. Requires `maths` and `color`; no options.

## Types

### `Easing`

```ts
type Easing = EaseName | EaseFn | readonly [number, number, number, number]
```

An easing: a name from `maths.EASE`, a curve function, or a cubic-bezier tuple `[x1, y1, x2, y2]`.

### `Props`

```ts
type Props = Record<string, number | string>
```

The properties to tween: numbers, or hex colour strings (blended in RGB).

### `TweenApi`

```ts
interface TweenApi
```

What `game.tween` presents.

- `to(target: object, props: Props, opts?: TweenOptions): TweenHandle` — From the current values to `props`. Throws if a property is not a number or hex colour.
- `from(target: object, props: Props, opts?: TweenOptions): TweenHandle` — From `props` to the current values; the start values are written at once, before any delay.
- `fromTo(target: object, from: Props, to: Props, opts?: TweenOptions): TweenHandle` — Explicit ends; the `from` values are written at once. Every key of `to` must also be in `from`.
- `sequence(steps: ReadonlyArray<() => TweenHandle | PromiseLike<unknown>>): TweenGroup` — Run steps one after another; each returns a handle (or a promise).
- `group(...handles: TweenHandle[]): TweenGroup` — One control over several running tweens.
- `interpolate(a: number | string, b: number | string, t: number, ease?: Easing): number | string` — One-off: the value between two numbers or hex colours at t.
- `pauseAll(): void` — Pause every live tween.
- `resumeAll(): void` — Resume every live tween.
- `stopAll(jumpToEnd?: boolean): void` — Stop every live tween; `jumpToEnd` writes their end values.
- `readonly count: number` — Live tweens, including paused and delayed ones.
- `isTweening(target?: object, prop?: string): boolean` — Is anything still animating? With no arguments, true while ANY tween is live — the "has the presentation caught up with the rules?" gate a board game holds its input behind. With a `target`, only that object's tweens count; with a `prop` as well, only tweens that drive that property. A tween still serving out its `delay` counts as live.

### `TweenGroup`

```ts
interface TweenGroup extends PromiseLike<void>
```

Control over several tweens at once, from `sequence` or `group`. Also a thenable that resolves when all have finished.

- `pause(): void` — Pause every member.
- `resume(): void` — Resume every member.
- `stop(jumpToEnd?: boolean): void` — Stop every member; `jumpToEnd` writes their end values.
- `readonly isDone: boolean` — True when every member is done.

### `TweenHandle`

```ts
interface TweenHandle extends PromiseLike<void>
```

Control over one running tween. Also a thenable: `await` resolves when it finishes, is stopped, or its scene exits (never for `loop: true`).

- `pause(): void` — Hold the tween where it is.
- `resume(): void` — Continue after `pause`.
- `stop(jumpToEnd?: boolean): void` — Stop; `jumpToEnd` snaps to the end values (and cancels remaining repeats).
- `seek(seconds: number): void` — Jump to a time in seconds from the start of the current run (after delay).
- `readonly progress: number` — 0..1 of the current run (time, not eased value); 1 once done.
- `readonly isPlaying: boolean` — Not done and not paused.
- `readonly isDone: boolean` — Finished, stopped, or ended by its target's death or scene exit.

### `TweenOptions`

```ts
interface TweenOptions
```

Options for `to`, `from` and `fromTo`.

- `duration?: number` — Seconds. Default 0.5.
- `ease?: Easing` — Default `easeInOutQuad`.
- `delay?: number` — Seconds before the first run starts. Default 0. `to` captures its start values when the delay ends.
- `loop?: boolean | number` — `true` = forever; a number = that many extra repeats.
- `yoyo?: boolean` — Reverse on each repeat.
- `onStart?(): void` — Called once when the tween starts running (after any delay).
- `onUpdate?(progress: number): void` — Called every simulate step with 0..1 of the current run.
- `onComplete?(): void` — Called when the tween finishes or is stopped. Not called when its target dies or its scene exits.

---

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