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addTask(input: TaskInput): Task if (!validateTaskTitle(input.title)) throw new Error("Invalid task title");

console.log("\n🔄 In-progress tasks:"); manager.printTasks("in-progress"); pure ts

console.log("\n📋 All tasks:"); manager.printTasks(); addTask(input: TaskInput): Task if (

Let's build a simple CLI task manager in pure TypeScript. src/types.ts export type TaskStatus = "pending" | "in-progress" | "done"; export interface Task id: number; title: string; status: TaskStatus; createdAt: Date; console.log("\n🔄 In-progress tasks:")

export type TaskInput = Omit<Task, "id" | "createdAt">; import Task from "./types.js"; export function validateTaskTitle(title: string): boolean return title.trim().length > 0 && title.length <= 100;

📋 All tasks: 🔄 [1] Learn Pure TypeScript (in-progress) ⏳ [2] Write documentation (pending) ⏳ [3] Deploy to production (pending) 🔄 In-progress tasks: 🔄 [1] Learn Pure TypeScript (in-progress)

import Task, TaskInput, TaskStatus from "./types.js"; import validateTaskTitle, formatTask from "./utils.js"; class TaskManager private tasks: Task[] = []; private nextId = 1;