JavaScript IIFE ? In 90 Seconds

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IIFE = Immediately Invoked Function Expression
It’s a JavaScript function that runs as soon as it is defined. It has no name and is not stored in a variable.
IIFE’s are commonly seen in libraries where the entire code base is wrapped inside of an IIFE. This prevents variables within the library from conflicting with variables outside of the library.
IIFE’s are generally used to avoid declaring variables in the global scope and to create closures.
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