init.md

Observer.init()

This function is used to implement property setters and getters that use Observer.set() and Observer.get() respectively behind the scene. This gives us the benefit of using JavaScript's assignment and accessor syntax while still driving observers and interceptors.

• Syntax
• Usage

Syntax

// Init a single property
Observer.init(object, propertyName);

// Init multiple properties
Observer.init(object, propertyNames);

Parameters

• obj - an object or array.
• propertyName/propertyNames - the property, or list of properties, to initialize.

Return Value

undefined

Usage

// The object
let obj = {};

// We observe the 'preferences' property
Observer.observe(obj, 'preferences', changes => {
    console.log(changes);
});

// Now we virtualize this property
Observer.init(obj, 'preferences');

// We use the property and watch our console.
obj.preferences = {};