javascirpt prototype

tina_tian1

于 2016-12-05 12:24:55 发布

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分类专栏： JavaScript

本文链接：https://blog.youkuaiyun.com/tina_tian1/article/details/53464098

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console.log('----------------------------------');


function baseClass()
{
    this.showMsg = function()
    {
        console.log("baseClass::showMsg");   
    }
   
    this.baseShowMsg = function()
    {
        console.log("baseClass::baseShowMsg");
    }
}
baseClass.showMsg = function()
{
    console.log("baseClass::showMsg static");
}

function extendClass()
{
    this.showMsg =function ()
    {
        console.log("extendClass::showMsg");
    }
}
extendClass.showMsg = function()
{
    console.log("extendClass::showMsg static")
}

extendClass.prototype = new baseClass();
var instance = new extendClass();

instance.showMsg(); //显示extendClass::showMsg
instance.baseShowMsg(); //显示baseClass::baseShowMsg
instance.showMsg(); //显示extendClass::showMsg

baseClass.showMsg.call(instance);//显示baseClass::showMsg static

var baseinstance = new baseClass();
baseinstance.showMsg.call(instance);//显示baseClass::showMsg