js两个json对象合并

let obj1 = { a: 1, b: 2 };
let obj2 = { b: 3, c: 4 };
let mergedObj = Object.assign({}, obj1, obj2);
console.log(mergedObj); // 输出: { a: 1, b: 3, c: 4 }

let obj1 = { a: 1, b: 2 };
let obj2 = { b: 3, c: 4 };
let mergedObj = { ...obj1, ...obj2 };
console.log(mergedObj); // 输出: { a: 1, b: 3, c: 4 }

// 使用递归实现深度合并
function isObject(obj) {
    return obj && typeof obj === 'object' && !Array.isArray(obj);
}

function deepMerge(target, source) {
    let output = Object.assign({}, target);
    if (isObject(target) && isObject(source)) {
        Object.keys(source).forEach(key => {
            if (isObject(source[key])) {
                if (!(key in target))
                    Object.assign(output, { [key]: source[key] });
                else
                    output[key] = deepMerge(target[key], source[key]);
            } else {
                Object.assign(output, { [key]: source[key] });
            }
        });
    }
    return output;
}

let obj1 = { a: 1, b: { x: 10, y: 20 } };
let obj2 = { b: { y: 30, z: 40 }, c: 4 };
let mergedObj = deepMerge(obj1, obj2);
console.log(mergedObj); // 输出: { a: 1, b: { x: 10, y: 30, z: 40 }, c: 4 }