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This feature is well established and works across many devices and browser versions. Its been available across browsers since 2016 9.
every() .
Array.prototype.every() .
TypedArray .
function isNegative(element, index, array) {
return element < 0;
}
const int8 = new Int8Array([-10, -20, -30, -40, -50]);
console.log(int8.every(isNegative));
// Expected output: true
// Arrow function
every((element) => { /* ... */ } )
every((element, index) => { /* ... */ } )
every((element, index, array) => { /* ... */ } )
// Callback function
every(callbackFn)
every(callbackFn, thisArg)
// Inline callback function
every(function(element) { /* ... */ })
every(function(element, index) { /* ... */ })
every(function(element, index, array){ /* ... */ })
every(function(element, index, array) { /* ... */ }, thisArg)
callbackFn.
.
thisArg OptionalcallbackFn this .
every callbackFn falsy
callbackFn . every false
. , truthy true .
callbackFn , .
thisArg every callbackFn this .
undefined . callbackFn this
this .
every .
9 .
function isBigEnough(element, index, array) {
return element >= 10;
}
new Uint8Array([12, 5, 8, 130, 44]).every(isBigEnough); // false
new Uint8Array([12, 54, 18, 130, 44]).every(isBigEnough); // true
new Uint8Array([12, 5, 8, 130, 44]).every((elem) => elem >= 10); // false
new Uint8Array([12, 54, 18, 130, 44]).every((elem) => elem >= 10); // true
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-%typedarray%.prototype.every |
TypedArray.prototype.every in core-jsTypedArray.prototype.some()Array.prototype.every()This page was last modified on 2025 6 24 by MDN contributors.
TypedArrayTypedArray.prototype.at()TypedArray.prototype.copyWithin()TypedArray.prototype.entries()TypedArray.prototype.every()TypedArray.prototype.fill()TypedArray.prototype.filter()TypedArray.prototype.find()TypedArray.prototype.findIndex()TypedArray.prototype.findLast()TypedArray.prototype.findLastIndex()TypedArray.prototype.forEach()includes()TypedArray.prototype.indexOf()TypedArray.prototype.join()TypedArray.prototype.keys()lastIndexOf()TypedArray.prototype.map()TypedArray.prototype.reduce()reduceRight()TypedArray.prototype.reverse()TypedArray.prototype.set()TypedArray.prototype.slice()TypedArray.prototype.some()TypedArray.prototype.sort()TypedArray.prototype.subarray()toLocaleString()TypedArray.prototype.toReversed()TypedArray.prototype.toSorted()TypedArray.prototype.toString()TypedArray.prototype.values()TypedArray.prototype.with()TypedArray.prototype[@@iterator]()Object/FunctionObject.prototype.__defineGetter__()Object.prototype.__defineSetter__()Object.prototype.__lookupGetter__()Object.prototype.__lookupSetter__()Object.prototype.hasOwnProperty()Object.prototype.isPrototypeOf()Object.prototype.propertyIsEnumerable()Object.prototype.toLocaleString()Object.prototype.toString()Object.prototype.valueOf()BigInt64ArrayBigUint64ArrayFloat16ArrayFloat32ArrayFloat64ArrayInt8ArrayInt16ArrayInt32ArrayUint8ArrayUint8ClampedArrayUint16ArrayUint32ArrayYour blueprint for a better internet.
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