JSFiddle - React, Tailwind, and code Playground

JavaScript

var store = (function() {
    var map = {};
    
    return {
        set: function ( name, value ) {
            map[ name ] = value;
        }, 
        get: function ( name ) {
            return map[ name ];
        }
    };
})();


store.set( 123, 'some value' );

console.log( store.get( 123 ) );
console.log( store.get( 456 ) );