javascript: different constructors for same type of object

匆匆过客 提交于 2019-12-05 08:22:05

No, Javascript does not support function overloading.

However, inside every function you have access to an arguments object, which holds all the arguments supplied to the function, declared or not. You can simply look at it and decide what exactly you want to do in your constructor.

Bad, unrefined example:

function Foo() {

    function singleParamConstructor(foo) {
        ...
    }
    function twoParamConstructor(foo, bar) {
        ...
    }

    switch (arguments.length) {
        case 1 :
            singleParamConstructor(arguments[0]);
            break;
        case 2 :
            twoParamConstructor(arguments[0], arguments[1]);
            break;
        ...
    }
}
Davide Piras
易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!