SpringPhase

Author: Aslemammad

spring/src/SpringPhase.ts

@@ -0,0 +1,24 @@
+/** The property symbol of the current animation phase. */
+const $P = Symbol.for('SpringPhase')
+
+const HAS_ANIMATED = 1
+const IS_ANIMATING = 2
+const IS_PAUSED = 4
+
+/** Returns true if the `target` has ever animated. */
+export const hasAnimated = (target: any) => (target[$P] & HAS_ANIMATED) > 0
+
+/** Returns true if the `target` is animating (even if paused). */
+export const isAnimating = (target: any) => (target[$P] & IS_ANIMATING) > 0
+
+/** Returns true if the `target` is paused (even if idle). */
+export const isPaused = (target: any) => (target[$P] & IS_PAUSED) > 0
+
+/** Set the active bit of the `target` phase. */
+export const setActiveBit = (target: any, active: boolean) =>
+  active
+    ? (target[$P] |= IS_ANIMATING | HAS_ANIMATED)
+    : (target[$P] &= ~IS_ANIMATING)
+
+export const setPausedBit = (target: any, paused: boolean) =>
+  paused ? (target[$P] |= IS_PAUSED) : (target[$P] &= ~IS_PAUSED)