Pose Core

Factory for Pose animation state machines

Install

npm install pose-core --save

Create a poser factory

JavaScript

import poseFactory from 'pose-core';

const pose = poseFactory(config);

TypeScript

const pose = poseFactory<Value, Action, Poser>(config);

Config options

All config options are mandatory.

getDefaultProps

Returns default properties to be injected into every poser's config.props property.

(config: PoserConfig) => { [key: string]: any }

readValue

Read and return from Value.

(value: Value) => any;

createValue

Create a new Value. Each Value is responsible for tracking a single value defined in the poser's poses.

type CreateValueProps = {
  passiveParent?: Value,
  passiveProps?: any // Passed as the second value in the `passive` tuple
}

(init: any, props?: CreateValueProps) => Value

resolveTarget

Accepts the target as defined in the pose, and returns an animatable version of it. For instance React Animated only animates raw numbers, so it runs every target through parseFloat.

(value: Value, target: any) => any

getTransitionProps

Takes the target as returned from resolveTarget and returns default props to be passed to the entered pose's transition function.

(value: Value, target: any) => { [key: string]: any }

bindOnChange

Bind the onChange callbacks to their respective Values.

type OnChangeMap = { [key: string]: (v: any) => void };
type ValuesMap = Map<string, Value>;

(values: Map<string, Value>, onChange: OnChangeMap) => (key: string) => void;

startAction

Takes an action (ie animation or interaction) and returns the subscription returned from its start (or equivalent) method. This subscription might be the same as the action (in the case of Animated) or different (in the case of Popmotion)

(action: Action, onComplete: Function) => ActionSubscription

stopAction

Takes an action subscription and stops it.

(actionSubscription: ActionSubscription) => void

getInstantTransition

Returns an Action that represents an instant transition. We do this rather than simply set on the corresponding Value because both Animated and Popmotion allow these "instant" actions to be composed with things like a delay action.

(value: Value, to: number) => Action

addActionDelay

Returns an action that delays the execution of the initially provided action.

(delay: number, action: Action) => Action

defaultTransitions

A Map that contains Action factory functions that match the signature of the pose's transition property.

The Map must contain at least a 'default' action factory.

Map<string, (props: Props) => Action>

selectValueToRead

Accepts Value and returns the value returned by poser.get(key: string)

(value: Value) => any

extendAPI

A chance to add methods to the output Poser. For instance the Popmotion Pose factory uses this to append DOM-specific FLIP methods. Simply return api for no change.

(api: Poser) => Poser