js 原型鏈總結

舉個例子

function Test() {
 this.name = "呂布";
 this.age = "35";
 this.skill_1 = function () {
 console.log(2)
 };
 this.skill_2 = function () {
 console.log(3)
 }
}

Test.prototype.skillPrototype1 = function () {
 console.log('skillPrototype1')
};
Test.prototype.skillPrototype2 = function () {
 console.log('skillPrototype2')
};
Test.prototype.haha = "1111";

var test = new Test();

console.log(test);

//繼承
function Data() {
 Test.apply(this)
}
Data.prototype = Test.prototype;

var newData = new Data();
console.log(newData);

// prototype 構造器原型上定義方法和屬性
// __proto__ 指向構造函數原型上
// constructor 指向構造器

//經過這樣一層一層的指向最頂端Object 構成原型鏈