Create easingpackage.js

easingpackage.js

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+export var easings = { // Easings taken from https://easings.net/
+	linear: (x) => {
+		return x;
+	},
+	easeInSine: (x) => {
+		return 1 - Math.cos((x * Math.PI) / 2);
+	},
+	easeOutSine: (x) => {
+		return Math.sin((x * Math.PI) / 2);
+	},
+	easeInOutSine: (x) => {
+		return -(Math.cos(Math.PI * x) - 1) / 2;
+	},
+	easeInQuad: (x) => {
+		return x * x;
+	},
+	easeOutQuad: (x) => {
+		return 1 - (1 - x) * (1 - x);
+	},
+	easeInOutQuad: (x) => {
+		return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
+	},
+	easeInCubic: (x) => {
+		return x * x * x;
+	},
+	easeOutCubic: (x) => {
+		return 1 - Math.pow(1 - x, 3);
+	},
+	easeInOutCubic: (x) => {
+		return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
+	},
+	easeInQuart: (x) => {
+		return x * x * x * x;
+	},
+	easeOutQuart: (x) => {
+		return 1 - Math.pow(1 - x, 4);
+	},
+	easeInOutQuart: (x) => {
+		return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
+	},
+	easeInQuint: (x) => {
+		return x * x * x * x * x;
+	},
+	easeOutQuint: (x) => {
+		return 1 - Math.pow(1 - x, 5);
+	},
+	easeInOutQuint: (x) => {
+		return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
+	},
+	easeInExpo: (x) => {
+		return x === 0 ? 0 : Math.pow(2, 10 * x - 10);
+	},
+	easeOutExpo: (x) => {
+		return x === 1 ? 1 : 1 - Math.pow(2, -10 * x);
+	},
+	easeInOutExpo: (x) => {
+		return x === 0
+	  ? 0
+  	: x === 1
+	  ? 1
+  	: x < 0.5 ? Math.pow(2, 20 * x - 10) / 2
+	  : (2 - Math.pow(2, -20 * x + 10)) / 2;
+	},
+	easeInCirc: (x) => {
+		return 1 - Math.sqrt(1 - Math.pow(x, 2));
+	},
+	easeOutCirc: (x) => {
+		return Math.sqrt(1 - Math.pow(x - 1, 2));
+	},
+	easeInOutCirc: (x) => {
+		return x < 0.5
+	  ? (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2
+  	: (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
+	},
+	easeInBack: (x) => {
+		const c1 = 1.70158;
+		const c3 = c1 + 1;
+		return c3 * x * x * x - c1 * x * x;
+	},
+	easeOutBack: (x) => {
+		const c1 = 1.70158;
+		const c3 = c1 + 1;
+		return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
+	},
+	easeInOutBack: (x) => {
+		const c1 = 1.70158;
+		const c2 = c1 * 1.525;
+		return x < 0.5
+	  ? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2
+	  : (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
+	},
+	easeInBounce: (x) => {
+		return 1 - easings.easeOutBounce(1 - x);
+	},
+	easeOutBounce: (x) => {
+		const n1 = 7.5625;
+		const d1 = 2.75;
+		
+		if (x < 1 / d1) {
+		    return n1 * x * x;
+		} else if (x < 2 / d1) {
+		    return n1 * (x -= 1.5 / d1) * x + 0.75;
+		} else if (x < 2.5 / d1) {
+		    return n1 * (x -= 2.25 / d1) * x + 0.9375;
+		} else {
+		    return n1 * (x -= 2.625 / d1) * x + 0.984375;
+		}
+	},
+	easeInOutBounce: (x) => {
+		return x < 0.5
+	  ? (1 - easings.easeOutBounce(1 - 2 * x)) / 2
+	  : (1 + easings.easeOutBounce(2 * x - 1)) / 2;
+	}
+};