NodeJS中的JavaScript類和模塊

Question

我很難理解如何將單獨的.js文件導入到index.js節點文件中。

我創建了一個文件pokemon.js，如下所示：

var pokemon = (function(){

  function Pokemon(name) {

    this.name = name; 
    console.log("pokemon");
  }

})();

module.exports.Pokemon = pokemon; 

現在在我的index.js中，我想使用它：

var Pokemon = require('./models/pokemon.js');

//如何調用Pokemon函數？

更新 ：

var Pokemon = require('./models/models.js');
var app = express();

var pokemons = [];

app.get("/pokemon/all",function(req,res){

  var pokemon = Pokemon("Pikachu"); // Pokemon is not a function



})

這是我找到的解決方案：

models.js：

module.exports = function(name) {
  this.name = name; 
}

index.js: 

var Pokemon = require('./models/models.js');
var app = express();

var pokemons = [];

app.get("/pokemon/all",function(req,res){

  var pokemon = new Pokemon('Pikachu');
  pokemons.push(pokemon);
  res.json(pokemons);

})

Answer 1

我看到您要導出對象構造函數。

pokemon.js

function Pokemon(name){
   this.name = name;
   console.log(this.name);
}
// if any prototype
Pokemon.prototype.serviceOne = function(){ };
Pokemon.prototype.serviceTwo = function(){ };


module.exports = Pokemon;

index.js

var Pokemon = require('path/to/pokemon'); 
app.get("/pokemon/all",function(req,res){

    var pikachu= new Pokemon("Pikachu"); 
    pikachu.serviceOne();
    pikachu.serviceTwo();

})

Answer 2

@catta提供的只是有一個小錯誤嘗試：

var pokemon = function(name) {
this.name = name; 
console.log("pokemon");
}
module.exports.Pokemon = pokemon; 

在index.js中

var Pokemon = require('./models.js'); 
Pokemon.Pokemon('name') //output name

Answer 3

pokemon.js

var pokemon = function(str){
    this.name = str; 
    console.log(this.name);
};
module.exports.Pokemon = pokemon;

main.js

var Pokemon = require('./models/models.js');
var app = express();
var pokemons = [];
app.get("/pokemon/all",function(req,res){
  pokemons.push(Pokemon.Pokemon("Pikachu"));
})

當您將var key設置為要求時，僅引用該文件。 因此，您需要“ Pokemon.Pokemon（）”