Private State with Closures

Snippet

A closure is created when an inner function references variables from its outer scope, allowing for private data encapsulation.

snippet.js
javascript
function createCounter() {
  let count = 0;
  return () => ++count;
}
const counter = createCounter();

Breakdown

let count = 0;

Variable defined in the lexical environment of the outer function.

return () => ++count;

Returns a function that maintains access to 'count'.

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