使用增强类型，您可以在默认情况下设置TsInterface的属性吗？

interface TsInterface {
    name: string;
    age?: number;
}

class TsClass implements TsInterface {
    name: string;
    age: number;

    constructor(name: string, age: number = 18) {
        this.name = name;
        this.age = age;
    }
}

const instance = new TsClass('Alice'); // age 默认为 18

interface TsInterface {
    name: string;
    age?: number;
}

function createTsInterface(name: string, age?: number): TsInterface {
    return {
        name,
        age: age ?? 18 // 使用空值合并运算符提供默认值
    };
}

const obj = createTsInterface('Bob'); // age 默认为 18

interface TsInterface {
    name: string;
    age?: number;
}

function createTsInterface(name: string): TsInterface;
function createTsInterface(name: string, age: number): TsInterface;
function createTsInterface(name: string, age?: number): TsInterface {
    return {
        name,
        age: age ?? 18
    };
}

const obj1 = createTsInterface('Charlie'); // age 默认为 18
const obj2 = createTsInterface('Dave', 25); // age 为 25