Detailed explanation of JS rewriting prototype objects
JSPrototype modification and rewriting
There are two ways to modify the js prototype:
1. In the original prototype Add properties and methods to the object: 12
function Person(){
}
Person.prototype.name="Mike";
Person.prototype.sayName=function(){
console.log(this.name);
} var person=
new
Person();
person.sayName(); //Mike1234567892. Override or overwrite the prototype object: 12
function Person(){
}
Person.prototype={ "name":"Mike",
sayName:function(){
console.log(this.name);
}
} var person=new Person();
person.sayName(); //Mike1234567891011Next let’s look at a question: (This question also explains the difference between adding properties and methods directly to the prototype object and overriding or overwriting the prototype object.) 12
function Person(){
} function Animal(){
} var person=new Person(); var animal=new Animal();
Person.prototype={ "name":"Mike",
sayName:function(){
console.log(this.name);
}
}
Animal.prototype.name="animal";
Animal.prototype.sayName=function(){
console.log(this.name);
}
person.sayName(); //error person.sayName is not a function
animal.sayName();//animal1234567891011121314151617181920
分析：12
function Person(){
} function Animal(){
} var person=new Person(); var animal=new Animal();
console.log(person.
proto
===Person.prototype); //true
console.log(animal.proto===Animal.prototype); //true
Person.prototype={ "name":"Mike",
sayName:function(){
console.log(this.name);
}
}
Animal.prototype.name="animal";
Animal.prototype.sayName=function(){
console.log(this.name);
}
console.log(person.proto===Person.prototype); //false
console.log(animal.proto===Animal.prototype); //true
person.sayName(); //error person.sayName is not a function
animal.sayName();//animalAbove This is a JS rewriting prototype object that I compiled for you. I hope it will be helpful to you in the future.
Related articles:
Detailed explanation of rewriting and overloading techniques of js methods
Focus on analysis of JavaScript rewriting alert () method skills
Focus on method rewriting in js inheritance
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