feat(easing): export standardEasingFunctions

src/index.ts

@@ -9,5 +9,6 @@ export { processTweens, shouldScheduleUpdate, Tweenable, tween }
 export { interpolate } from './interpolate'
 export { Scene } from './scene'
 export { setBezierFunction } from './bezier'
+export { standardEasingFunctions } from './standard-easing-functions'
 
 export * from './types'

src/easing-functions.ts → src/standard-easing-functions.ts

@@ -14,13 +14,13 @@
  */
 
 /**
- * The base set of easing functions availble for use with Shifty tweens.
+ * The standard set of easing functions availble for use with Shifty tweens.
  *
- * This is distinct from {@link Tweenable.easing}. {@link Tweenable.easing}
- * contains everything within `easingFunctions` but also any custom easing
- * functions that you have defined.
+ * This is distinct from `Tweenable`'s {@link Tweenable.easing}. {@link
+ * Tweenable.easing} contains everything within `easingFunctions` but also any
+ * custom easing functions that you have defined.
  */
-export const baseEasingFunctions = {
+export const standardEasingFunctions = Object.freeze({
   linear: (pos: number) => pos,
 
   easeInQuad: (pos: number) => Math.pow(pos, 2),
@@ -175,4 +175,4 @@ export const baseEasingFunctions = {
   easeFrom: (pos: number) => Math.pow(pos, 4),
 
   easeTo: (pos: number) => Math.pow(pos, 0.25),
-}
+})

src/tweenable.ts

@@ -1,4 +1,4 @@
-import { baseEasingFunctions } from './easing-functions'
+import { standardEasingFunctions } from './standard-easing-functions'
 import { getCubicBezierTransition } from './bezier'
 import {
   Data,
@@ -132,7 +132,7 @@ export const tweenProps = <T extends TweenRawState>(
         // easingObjectProp is a string
         easingFn =
           Tweenable.easing[easingObjectProp as EasingKey] ??
-          baseEasingFunctions.linear
+          standardEasingFunctions.linear
       }
     }
 
@@ -386,7 +386,9 @@ export class Tweenable {
    * Tweenable.easing['customEasing'] = (pos: number) => Math.pow(pos, 2)
    * ```
    */
-  static easing: typeof baseEasingFunctions = Object.create(baseEasingFunctions)
+  static easing: Record<string, EasingFunction> = Object.create(
+    standardEasingFunctions
+  )
 
   /**
    * @ignore

src/types.ts

@@ -1,5 +1,5 @@
 import { Tweenable } from './tweenable'
-import { baseEasingFunctions } from './easing-functions'
+import { standardEasingFunctions } from './standard-easing-functions'
 
 /**
  * Asynchronous scheduling function. By default this is
@@ -90,7 +90,7 @@ export interface EasingFunction {
 /**
  * A string identifier of an easing curve to use for an animation.
  */
-export type EasingKey = keyof typeof baseEasingFunctions
+export type EasingKey = keyof typeof standardEasingFunctions
 
 /**
  * A map of {@link TweenState} property names to the easing identifier or
@@ -179,13 +179,13 @@ export interface TweenableConfig {
   /**
    * This value can be one of several different types:
    *
-   * - `string`: Name of the {@link baseEasingFunctions} to apply to all properties
+   * - `string`: Name of the {@link standardEasingFunctions} to apply to all properties
    * of the tween.
    * - {@link EasingFunction}: A custom function that computes the rendered
    * position of the tween for the given normalized (0-1) position of the
    * tween.
    * - `Record<string, string | EasingFunction>`: Keys are tween property
-   * names. Values are the {@link baseEasingFunctions} string IDs to be applied to
+   * names. Values are the {@link standardEasingFunctions} string IDs to be applied to
    * each tween property, or a {@link EasingFunction}. Any tween properties not
    * explicitly included in the `Record` default to `'linear'`.
    * - `Array.<number>`: The array must contain four `number` values that