feat: add utility functions for formatting and animation

src/lib/utils.ts

@@ -4,3 +4,51 @@ import { twMerge } from "tailwind-merge"
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
 }
+
+export function formatNumber(num: number): string {
+  return new Intl.NumberFormat("zh-CN").format(num)
+}
+
+export function formatCurrency(amount: number): string {
+  return new Intl.NumberFormat("zh-CN", {
+    style: "currency",
+    currency: "CNY",
+  }).format(amount)
+}
+
+export function debounce<T extends (...args: unknown[]) => unknown>(
+  func: T,
+  wait: number
+): (...args: Parameters<T>) => void {
+  let timeout: NodeJS.Timeout | null = null
+  return (...args: Parameters<T>) => {
+    if (timeout) clearTimeout(timeout)
+    timeout = setTimeout(() => func(...args), wait)
+  }
+}
+
+export function throttle<T extends (...args: unknown[]) => unknown>(
+  func: T,
+  limit: number
+): (...args: Parameters<T>) => void {
+  let inThrottle: boolean
+  return (...args: Parameters<T>) => {
+    if (!inThrottle) {
+      func(...args)
+      inThrottle = true
+      setTimeout(() => (inThrottle = false), limit)
+    }
+  }
+}
+
+export function randomBetween(min: number, max: number): number {
+  return Math.random() * (max - min) + min
+}
+
+export function lerp(start: number, end: number, t: number): number {
+  return start + (end - start) * t
+}
+
+export function clamp(value: number, min: number, max: number): number {
+  return Math.min(Math.max(value, min), max)
+}