JavaScript Array_some_every Guide
Array.prototype.some() and every() test whether elements pass conditions. Some = OR, every = AND. The guide walks through some() & every(). `arr.some(fn)` — true if ANY element passes. `arr.every(fn)` — true if ALL elements pass. Early exit: some/every stop iterating once the result is determined. Empty arrays: some → false, every → true (vacuous truth). Examples: `users.some(u => u.admin)`, `items.every(i => i.price > 0)`. The guide is organized into 1 sections that build on each other, each pairing a prose explanation with runnable code. Related guides: Arrays, Strings, Numbers, Math, Date. This is one of 145 JavaScript guides on JS Reference — see the full list on the guides page. Practice what you learn in the JavaScript playground, and look up any unfamiliar term in the JavaScript glossary.