How to empty an array in JavaScript

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Thursday, September 18, 2025

#javascript #array #empty #clear #length #reset

Emptying arrays is essential for resetting application state, clearing user selections, or preparing arrays for new data without breaking existing references in JavaScript applications. With over 25 years of experience in software development and as the creator of CoreUI, I’ve implemented array clearing in numerous components like shopping carts, form builders, and data tables where arrays need to be reset while maintaining their reference integrity. From my extensive expertise, the most efficient and reference-preserving solution is setting the array’s length property to 0. This approach clears all elements while keeping the same array object, ensuring all variables pointing to it remain valid.