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/*两个Json 对象比较*/
function isObj(object) {
    return object && typeof(object) == 'object' && Object.prototype.toString.call(object).toLowerCase() == "[object object]";
}

function isArray(object) {
    return object && typeof(object) == 'object' && object.constructor == Array;
}

function getLength(object) {
    var count = 0;
    for(var i in object) count++;
    return count;
}

function Compare(objA, objB) {
    if(!isObj(objA) || !isObj(objB)) return false; //判断类型是否正确
    if(getLength(objA) != getLength(objB)) return false; //判断长度是否一致
    return CompareObj(objA, objB, true); //默认为true
}

function CompareObj(objA, objB, flag) {
    for(var key in objA) {
        if(!flag) //跳出整个循环
            break;
        if(!objB.hasOwnProperty(key)) {
            flag = false;
            break;
        }
        if(!isArray(objA[key])) { //子级不是数组时,比较属性值
            if(objB[key] != objA[key]) {
                flag = false;
                break;
            }
        } else {
            if(!isArray(objB[key])) {
                flag = false;
                break;
            }
            var oA = objA[key],
                oB = objB[key];
            if(oA.length != oB.length) {
                flag = false;
                break;
            }
            for(var k in oA) {
                if(!flag) //这里跳出循环是为了不让递归继续
                    break;
                flag = CompareObj(oA[k], oB[k], flag);
            }
        }
    }
    return flag;
}

https://blog.csdn.net/github_38771368/article/details/76984673