Array.prototype.some(callback) asks: does at least one element pass this test? It returns true or false, stops early on the first match, and does not mutate the array. Need every element to pass? Use every().
array.some(callback)
callback(element, index, array) → truthy / falsy
any pass → true (stops early)
none pass → false
empty [] → false
some = ANY pass?
every = ALL pass?Call array.some. Start with this line.
array.some(callback)| Call | What it does |
|---|---|
array.some(callback) | Primary signature. |
array.some(...) | Call with the arguments your case needs. |
Built into JavaScript. Call some(...) on an array instance — no import required.
array.some(callback)| Parameter | Description |
|---|---|
| Array | Required. Values to test (read-only) |
| callback | Required. Returns truthy if this element “passes” |
| thisArg | Optional. Value for this inside the callback |
| Return Value | Description |
|---|---|
| * | true or false |
Check if any number is greater than 30.
const numbers = [10, 20, 30, 40, 50];
const hasAbove30 = numbers.some((num) => num > 30);
console.log(hasAbove30);
// truenum > 30.10, 20, and 30 fail the test.40 passes → some returns true immediately.50 is never checked (short-circuit).false When None MatchIf every callback result is falsy, the answer is false.
const numbers = [10, 20, 30, 40, 50];
const hasAbove100 = numbers.some((num) => num > 100);
console.log(hasAbove100);
// false100.some returns false.numbers is still [10, 20, 30, 40, 50].some() vs every()Same scores, different questions: any fail vs all pass.
const scores = [80, 92, 76, 88];
const anyFail = scores.some((s) => s < 70);
const allPass = scores.every((s) => s >= 70);
console.log("any below 70?", anyFail);
// false
console.log("all at least 70?", allPass);
// true70 — none exist → false.70 — all four pass → true.some; universal check → every.Array.prototype.some() has been available since ES5 (2009), alongside every, filter, and map.
Supported in Chrome, Firefox, Safari, Edge, IE 9+, and all modern Node.js versions.
Bottom line: Safe for modern and legacy IE9+ projects. No polyfill needed for current browsers and Node LTS.
Learn how to reorder array elements with a compare function.
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