之前同事這麼用的。

進行了程式碼封裝，看著程式碼比較整潔

var client = {};
(function (self) {
    if (!self) {
        window.client = {};
        self = window.client;
    }
    self.clientA = {};
    self.clientA.fun1 = function () {

    };
    self.clientA.fun2 = function () {

    };

    self.clientB = {};
    self.clientB.func1 = function () {
        
    };
    self.clientB.func2 = function () {

    };

    self.clientC = {};
})(client);