高级编程三——this对象

<script>

          varname = "My Window";

          varobject = {

                name: "My Object",

                getNameFunc: function(){//函数在被调用时会自动取得两个特殊变量：this和arguments

                      console.log(this.name);//"My Object"

                      returnfunction(){//内部函数不可以直接访问外部函数中的特殊变量:this和arguments

                           returnthis.name;//此处的this访问不到外部函数运行时的直接调用者object

                      }

                }

           }

           console.log(object.getNameFunc()());//"The Window"(非严格模式下)

</script>

<script>

varname = "My Window";

          varobject = {

                name: "My Object",

                getNameFunc: function(){

                      varthat = this;//将对this的引用保存到另一个闭包函数能够访问的变量中。

                      returnfunction(){

                           returnthat.name;//内部函数被调用时，遇到变量(除了this和arguments)，会在私有作用域和外部作用域查找并访问。

                      }

                }

           }

           console.log(object.getNameFunc()());//"My Object"

</script>

     <script>

          varname = "My Window";

           varobject = {

                name: "My Object",

                getName: function(){

                      returnthis.name;

                }

           }

           console.log(object.getName());//"My Object"

           console.log((object.getName)());//"My Object"

          console.log((object.getName= object.getName)());//"My Window";此处的变量object.getName被赋值为一个函数。匿名函数的this默认指向的是window;(非严格模式下)

     </script>