IIFEs
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What is IIFEs?
An IIFE (Immediately Invoked Function Expression) is a function that is defined and called at the same time. It is written as (function() { ... })() or (() => { ... })(). IIFEs are used to create a private scope, avoiding polluting the global namespace, and were common before ES6 modules.
Free resources to learn IIFEs
- ArticleIIFE — MDN Docs
- ArticleJavaScript in Plain English - IIFE
More in stage 10: Functions
IIFEs: common questions
Can I learn IIFEs in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain IIFEs in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this IIFEs tutorial for beginners?
It is lesson 77 of 124 in the free JavaScript roadmap, in stage 10, Functions. If you are new to JavaScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.