JavaScript · Middle · Question 13 of 75

What was an IIFE `(function () { ... })()` used for in the past?

✓Correct answer: To create an isolated scope and avoid polluting the global one
2To speed up the function through early compilation
3To run the function asynchronously after the page loads

Explanation

Before let/const and modules, a function was the only way to hide variables. An IIFE created a private scope (the "module" pattern). Today ES modules and blocks solve this, and IIFEs are sometimes used for top-level async code.

What was an IIFE `(function () { ... })()` used for in the past?

Explanation

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What was an IIFE (function () { ... })() used for in the past?

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What was an IIFE `(function () { ... })()` used for in the past?