JavaScript (ReactJS)比较两个对象

function deepEqual(obj1, obj2) {
  // 判断类型
  if (typeof obj1 !== typeof obj2) {
    return false;
  }

  // 判断属性个数
  const keys1 = Object.keys(obj1);
  const keys2 = Object.keys(obj2);
  if (keys1.length !== keys2.length) {
    return false;
  }

  // 比较属性值
  for (let key of keys1) {
    if (!deepEqual(obj1[key], obj2[key])) {
      return false;
    }
  }

  return true;
}

const obj1 = { name: 'John', age: 30 };
const obj2 = { name: 'John', age: 30 };
console.log(deepEqual(obj1, obj2)); // 输出 true

const obj1 = { name: 'John', age: 30 };
const obj2 = { name: 'John', age: 30 };
const obj3 = obj1;

console.log(obj1 === obj2); // 输出 false
console.log(obj1 === obj3); // 输出 true