Object

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

import canReflect from "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:

import canSymbol from "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 its 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.