JavaScript 与 TypeScript 你应该选择哪一个？

   let myvariable = 42;   myvariable = "now i'm a string!";   console.log(myvariable); // outputs: now i'm a string!

   const person = {     name: 'sarah',     greet() {       console.log(`hi, i'm ${this.name}!`);     }   };   person.greet(); // outputs: hi, i'm sarah!

   class developer {     constructor(name, language) {       this.name = name;       this.language = language;     }     code() {       console.log(`${this.name} is coding in ${this.language}`);     }   }   const dev = new developer('alex', 'javascript');   dev.code(); // outputs: alex is coding in javascript

   async function fetchdata() {     try {       const response = await fetch('https://api.example.com/data');       const data = await response.json();       console.log(data);     } catch (error) {       console.error('oops! something went wrong:', error);     }   }

   let username: string = "codeninja";   username = 42; // error: type 'number' is not assignable to type 'string'.

   interface user {     id: number;     name: string;     email: string;   }   function greetuser(user: user) {     console.log(`welcome, ${user.name}!`);   }

   class genericstack<t> {     private items: t[] = [];     push(item: t): void {       this.items.push(item);     }     pop(): t | undefined {       return this.items.pop();     }   }   const numberstack = new genericstack<number>();   numberstack.push(1);   numberstack.push(2);   console.log(numberstack.pop()); // outputs: 2</number></t>

   type Status = "pending" | "approved" | "rejected";   interface Task {     id: number;     status: Status;   }   function updateTaskStatus(task: Task, newStatus: Status) {     task.status = newStatus;   }