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A minimalist module for loading API resources when they are used.


Having a big service API wrapper written in NodeJS, most of people create a for loop and load all API files before doing anything. The files are loaded in RAM. So, It's not so RAM friendly to load them this way.

With the lazy-api module this issue is fixed. Lazy API loads the file when the API method is called. If an application only uses one file, only that file will be loaded in RAM. The other will not be loaded.

☁️ Installation

# Using npm 
npm install --save lazy-api
# Using yarn 
yarn add lazy-api

📋 Example

// Dependencies
var LazyApi = require("lazy-api");
var Apis = {};
// Instead of doing
// Apis.some = require("./some");
// we do:
LazyApi(Apis, "some", __dirname + "/some");
// And when we will call this method, the file
// will be loaded in the RAM.
Apis.some.method({foo: "bar"}, function (err, d) {
    console.log(err || d);
// What if we need to run some custom handlers?
LazyApi.returnHandler = function (path, name, scope) {
    console.log("Loading " + path);
    return require(path);
// "Load" (but not in RAM) the another file
LazyApi(Apis, "another", __dirname + "/another");
// Call the method (this will load the file)
Apis.another.method({foo: "bar"}, function (err, d) {
    console.log(err || d);
// Call the method again (the file is already loaded);
Apis.another.method({foo: "bar"}, function (err, d) {
    console.log(err || d);

❓ Get Help

There are few ways to get help:

  1. Please post questions on Stack Overflow. You can open issues with questions, as long you add a link to your Stack Overflow question.
  2. For bug reports and feature requests, open issues. 🐛
  3. For direct and quick help, you can use Codementor. 🚀

📝 Documentation

LazyApi(scope, name, path)

Defines the new property in the scope, adding the get handler.


  • Object scope: The scope object (default: this)
  • String name: Property (API) name
  • String path: The path to JavaScript/JSON file.


  • Object The object where the property was defined.

returnHandler(path, name, scope)

The default function that will be called when a property is accessed. This function can be overrided with custom code.


  • String path: The path to JavaScript/JSON file.
  • String name: Property (API) name
  • Object scope: The scope object (default: this)


  • Object The export object of a JSON/JavaScript file.

😋 How to contribute

Have an idea? Found a bug? See how to contribute.

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Thanks! ❤️

💫 Where is this library used?

If you are using this library in one of your projects, add it in this list. ✨

  • brightbox

📜 License

MIT © Ionică Bizău


npm i lazy-api

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