register.js

An implementation of Register Pattern with small set of API that allows you to:

• set a value to a key.
• get a value associated to a key, if none, return the default value (by default set to undefined).
• setDefault value.
• getDefault value.
• hasKey to check if a key is defined.
• keys return a set of all defined keys.
• values return a set of all defined values.
• toObject to convert the register into an object.

Install

For UMD (universal, including Browser), download the register_umd.js. Register will be globally available. See implementation on tests/test.html.

For node:

npm i @saveav/register

And require the package this way:

var Register = require('@saveav/register');

Initialize

var reg = new Register();

With default value:

var reg = new Register({name: undefined, locale: "en"});
reg.get("adam"); // => {name: undefined, locale: "en"}

With default value and initial values:

var reg = new Register({name: undefined, locale: "en"}, {
  adam: {name: "Adam", locale: "id"}
})

reg.get("adam"); // => {name: "Adam", locale: "id"}

Use-case

Other than as an object; as a replacement of switch (who likes switch here?). For implementation of switch replacement using the registry pattern, head to the test folder and open switch_test.

License

Open source. MIT. 2016.