# JavaScript Modules (ES 6 Modules) as Singleton Pattern

A counter declared as ES 6 module:

let counter = 0;
export const inc = _ => ++counter;    

is loaded once and therefore can be considered as a singleton.

The first.js:




import { inc } from "./counter.js";
console.log('first',inc());
console.log('first..',inc());

    

...and another.js modules
both are going to access the global counter variable via inc() function:




import { inc } from "./counter.js";
console.log('another',inc());    

    


The output is:     



first 1
first.. 2
another 3    
    


See it in action: