Closure example

HTML

<button>Go</button>

JavaScript

document
  .querySelector('button')
  .addEventListener('click', function () {

  for (let i = 0; i < 10; ++i) {
    setTimeout(function () {
      alert(i)
    }, 1000)
  }

})

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Closure example

HTML

JavaScript

Please Whitelist JSFiddle in your content blocker.

Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console