要遍历 JavaScript 对象，可以使用以下方法：1. for…in 循环；2. Object.keys() 方法；3. object.values() 方法；4. object.entries() 方法；5. foreach() 方法。
如何使用 JavaScript 遍历对象
要遍历 JavaScript 对象，可以使用以下方法：
const obj = { name: "John Doe", age: 30, city: "New York" }; for (let key in obj) { console.log(key); // 输出 "name", "age", "city" }
2. Object.keys() 方法
const obj = { name: "John Doe", age: 30, city: "New York" }; const keys = Object.keys(obj); console.log(keys); // 输出 ["name", "age", "city"]
3. Object.values() 方法
const obj = { name: "John Doe", age: 30, city: "New York" }; const values = Object.values(obj); console.log(values); // 输出 ["John Doe", 30, "New York"]
4. Object.entries() 方法
const obj = { name: "John Doe", age: 30, city: "New York" }; const entries = Object.entries(obj); console.log(entries); // 输出 [["name", "John Doe"], ["age", 30], ["city", "New York"]]
5. foreach() 方法
const obj = { name: "John Doe", age: 30, city: "New York" }; obj.forEach((value, key) => { console.log(`${key}: ${value}`); });
