Node.js-将上下文传递给函数属性中的嵌套对象

Question

I need to make a cleanly name-spaced module in Node.js, break it up into sub-modules via require() and pass the root context/scope all the way to the methods in the name-spaces.

// index.js

  var SDK = function(data){
      this.data = data;
  };

  SDK.prototype.Utilities = require('./utilities');

  module.exports = function(data) {
      return new SDK(data);
  };

// utilities.js

  module.exports = {
       callAPI: function() {
            console.log(this.data);
       }  
  };   


// Use-case (somewhere in the node.js app...)

  var SDK = require('./index')("this is some data");
  SDK.Utilities.callAPI();  
  // Should return "this is some data"

For example:

this in SDK needs to be accessible in SDK.Utilities.callAPI(); , like below. Utilities is the name-space I'm referring to.

I'm aware of javascript bind() and call() techniques, but I'm not sure how to use them in this particular case.

Answer 1

You should use or

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/apply

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call

these run the function with the given scope.