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maybee

v0.1.4

Published

Safe chaining of object properties and functions using ES2015 Proxy.

Downloads

41

Readme

MayBee

Safe chaining of object properties and functions using ES2015 Proxy.

Travis   npm   License MIT

  • npm: npm install maybee --save

Getting Started

Note: Requires Proxy support.

import {safeguard, isUndefined, isNull} from 'maybee';

const person = safeguard({ name: 'Adam', age: null });

console.log(person.name); // Adam
console.log(isNull(person.age)) // true
console.log(isUndefined(person.getNames().firstName)) // true
console.log(isUndefined(person.with.a.long.non.existent.property)) // true

See unit tests for further examples — however considering a primitive isn't returned, then you can continue chaining as required — this is in anticipation of an eventual value, and therefore primitives are returned when they exist.

Undefined!

Once MayBee finds a primitive value in your object, then all of the Proxy witchery is stopped from there on in.

For example, given the person above, we can extend infinitely on unknown properties/functions, but as soon as a primitive has been reached, then normal JavaScript rules are abided by:

// √
console.log(person.with.an.unknown().property.and.a().function.or.two);

// TypeError: person.name.on is undefined √
console.log(person.name.on.a.known().property);

This behaviour makes it easier to stick closely with the JavaScript spec — otherwise MayBee would have to introduce a non-standard function for when you wanted the value rather than another Proxy — such as getValue() — ugh!

forthebadge

Example

Screenshot

Try out the interactive console example on Heroku!