[wip] Add reducing side margin effect on Photos when scrolling

src/utils/functions.ts

@@ -1,3 +1,29 @@
+/**
+ * Throttle function
+ */
+export const throttle = (func: Function, timeout: number) => {
+    let ready: boolean = true
+    return (...args: any) => {
+        if (!ready) return
+        ready = false
+        func(...args)
+        setTimeout(() => ready = true, timeout)
+    }
+}
+
+
+/**
+ * Debounce function
+ */
+export const debounce = (func: Function, timeout: number) => {
+    let timer: NodeJS.Timeout
+    return (...args: any) => {
+        clearTimeout(timer)
+        timer = setTimeout(() => func(...args), timeout)
+    }
+}
+
+
 /**
  * Linear Interpolation
  */
@@ -6,6 +32,15 @@ export const lerp = (start: number, end: number, amt: number): number => {
 }
 
 
+/**
+ * Clamp a number
+ */
+export const clamp = (num: number, a: number, b: number) => {
+    return Math.max(Math.min(num, Math.max(a, b)), Math.min(a, b))
+}
+
+
+
 /**
  * Return a random element from an array
  */