JavaScript在对象迭代中插入字符串

const obj = { name: 'John', age: 30, city: 'New York' };
let result = '';

for (let key in obj) {
  result += key + ': ' + obj[key] + ', ';
}

result = result.slice(0, -2); // 去除最后的逗号和空格

console.log(result);

const obj = { name: 'John', age: 30, city: 'New York' };
let result = '';

Object.entries(obj).forEach(([key, value]) => {
  result += key + ': ' + value + ', ';
});

result = result.slice(0, -2); // 去除最后的逗号和空格

console.log(result);

const obj = { name: 'John', age: 30, city: 'New York' };
let result = '';

JSON.stringify(obj, (key, value) => {
  result += key + ': ' + value + ', ';
  return value;
});

result = result.slice(0, -2); // 去除最后的逗号和空格

console.log(result);