can-reflect

Object

The can-reflect package exports an object with methods used to perform operations and read information on unknown data types. For example the sets the name property on some type of map:

const canReflect = require("can-reflect");

const map = CREATE_MAP_SOMEHOW();

canReflect.setKeyValue(map,"name", "my map");

Any object can interact with the reflect APIs by having the right can-symbol symbols. The following creates an object that informs how getKeyValue and setKeyValue behave:

const canSymbol = require("can-symbol");

const obj = {
    _data: new Map()
};
obj[canSymbol.for("can.getKeyValue")] = function(key){
    return this._data.get(key);
};
obj[canSymbol.for("can.setKeyValue")] = function(key, value){
    return this._data.set(key, value);
};

can-reflect organizes it's methods into the following groups:

• Type Reflections - Determine if an object matches a familiar type to CanJS.
• Get/Set Reflections - Read and write to objects.
• Call Reflections - Call functions and function-like objects.
• Shape Reflections - Perform operations based on multiple values within an object.
• Observable Reflections - Listen to changes in observable objects.