js function obj

function greet(name) {
    return `Hello, ${name}!`;
}

console.log(greet('World')); // 输出: Hello, World!

const greet = (name) => `Hello, ${name}!`;

console.log(greet('World')); // 输出: Hello, World!

function Person(name, age) {
    this.name = name;
    this.age = age;
}

const person = new Person('Alice', 30);
console.log(person); // 输出: Person { name: 'Alice', age: 30 }

function example() {
    let localVar = 'I am local';
    console.log(localVar); // 输出: I am local
}

example();
console.log(localVar); // 报错: localVar is not defined

// 使用 Promise
function asyncTask() {
    return new Promise((resolve, reject) => {
        setTimeout(() => resolve('Task completed'), 1000);
    });
}

asyncTask().then(result => console.log(result)); // 输出: Task completed

// 使用 async/await
async function runTask() {
    const result = await asyncTask();
    console.log(result); // 输出: Task completed
}

runTask();