add cookie methods

src/lib/__tests__/cookie.test.js

@@ -0,0 +1,56 @@
+import { describe, test, expect, beforeEach } from "vitest"
+import { saveCookie, getCookie, deleteCookie } from "../cookie"
+
+describe("saveCookie", () => {
+  test("throws error on empty name", () => {
+    expect(() => saveCookie())
+      .toThrowError("Cookie name is required")
+  })
+
+  test("saves empty value", () => {
+    saveCookie("a", "")
+    expect(document.cookie).toMatch("a=")
+  })
+
+  test("saves cookie", () => {
+    saveCookie("a", "1234")
+    expect(document.cookie).toMatch("a=1234")
+  })
+
+  test("saves cookie with latest value", () => {
+    saveCookie("a", "1234")
+    saveCookie("a", "124")
+    expect(document.cookie).toMatch("a=124")
+    expect(document.cookie).not.toMatch("a=1234")
+  })
+})
+
+describe("getCookie", () => {
+  test("gets none", () => {
+    saveCookie("b", "54321")
+    expect(getCookie("c")).toBeUndefined()
+  })
+
+  test("gets cookie", () => {
+    saveCookie("b", "54321")
+    expect(getCookie("b")).toBe("54321")
+  })
+})
+
+describe("deleteCookie", () => {
+  test("deletes cookie", () => {
+    saveCookie("c", "12345")
+    saveCookie("d", "54321")
+    deleteCookie("c")
+    expect(document.cookie).not.toMatch("c=12345")
+    expect(document.cookie).toMatch("d=54321")
+  })
+
+  test("deletes none", () => {
+    saveCookie("one", "12345")
+    saveCookie("two", "54321")
+    deleteCookie("e")
+    expect(document.cookie).toMatch("one=12345")
+    expect(document.cookie).toMatch("two=54321")
+  })
+})

src/lib/cookie.ts

@@ -0,0 +1,18 @@
+export const saveCookie = (name: string, value: string, mins: number = 60) => {
+  if (!name)
+    throw new Error('Cookie name is required')
+
+  const date = new Date()
+  date.setTime(date.getTime() + mins * 60 * 1000)
+  document.cookie = `${name}=${value};Expires=${date.toUTCString()}; path=/; Secure; SameSite=None`
+}
+
+export const getCookie = (name: string) => {
+  const value = `; ${document.cookie}`
+  const parts = value.split(`; ${name}=`)
+  if (parts.length === 2) return parts.pop()?.split(';').shift()
+}
+
+export const deleteCookie = (name: string) => {
+  document.cookie = `${name}=; Max-Age=0; path=/; Secure; SameSite=None`
+}