Web Reference: Apr 19, 2019 · In short, use function declarations when you want to create a function on the global scope and make it available throughout your code. Use function expressions to limit where the function is available, keep your global scope light, and maintain clean syntax. Oct 21, 2021 · A function can have a scope/encapsulation and contain multiple statements. The function body is essentially just an expression, albeit one that contains unbound variables that reference the function parameters. Mar 15, 2026 · Confused between function declarations and function expressions in JavaScript? This guide breaks down the differences, hoisting behavior, and when to use each — with clear code examples.
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