node与windows下的this

windows环境下与node环境下的this比较：
（1）windows

a.var pet ={    word:'....',    speak:function(){        console.log(this.word);        console.log(this === pet);    }}pet.speak();结果：...  trueb.function pet(word){    this.word = word;    console.log(this === window);}pet('....');结果：truec.function pet(word){    this.word = word;    this.speak = function(){        console.log(this);    }}var p = new pet('...');p.speak();结果：petspeak: ()word: "..."__proto__: Object

（2）node

a.var pet ={    word:'....',    speak:function(){        console.log(this.word);        console.log(this === pet);    }}pet.speak();结果：...      trueb.function pet(word){    this.word = word;    console.log(this === window);}pet('....');结果：error修改：function pet(word){    this.word = word;    console.log(this === global);}pet('....');c.function pet(word){    this.word = word;    this.speak = function(){        console.log(this);}}var p = new pet('...');p.speak();结果：pet { word: '...', speak: [Function] }