js往对象添加元素

let obj = {};
obj.name = "Alice";
console.log(obj); // 输出: { name: 'Alice' }

let obj = {};
obj["name"] = "Bob";
console.log(obj); // 输出: { name: 'Bob' }

let obj1 = {};
let obj2 = { name: "Charlie" };
Object.assign(obj1, obj2);
console.log(obj1); // 输出: { name: 'Charlie' }

let obj1 = {};
let obj2 = { name: "David" };
let newObj = { ...obj1, ...obj2 };
console.log(newObj); // 输出: { name: 'David' }

let obj = {};
obj["first name"] = "Eve";
console.log(obj); // 输出: { 'first name': 'Eve' }

let obj = {};
let key = "age";
obj[key] = 30;
console.log(obj); // 输出: { age: 30 }

let obj1 = { name: "Frank" };
let obj2 = { name: "Grace" };
let newObj = { ...obj1, ...obj2 };
console.log(newObj); // 输出: { name: 'Grace' }