freeCodeCamp/guide/chinese/certifications/javascript-algorithms-and-data-structures/object-oriented-programming/use-inheritance-so-you-dont-repeat-yourself/index.md

title	localeTitle
Use Inheritance So You Don't Repeat Yourself	使用继承，所以你不要重复自己

使用继承，所以你不要重复自己

解

从Cat.prototype和Bear.prototype中删除“eat”方法并将其添加到Animal.prototype中。

function Cat(name) { 
  this.name = name; 
 }; 
 
 Cat.prototype = { 
  constructor: Cat 
 }; 
 
 function Bear(name) { 
  this.name = name; 
 }; 
 
 Bear.prototype = { 
  constructor: Bear 
 }; 
 
 function Animal() { }; 
 
 Animal.prototype = { 
  constructor: Animal, 
  eat: function() { 
    console.log("nom nom nom"); 
  } 
 };