JavaScript Array some()
Example 1
Check if any values are over 18:
const ages = [3, 10, 18, 20];
ages.some(checkAdult);
function checkAdult(age) {
return age > 18;
}
Try it Yourself »
ages.some(checkAdult);
function checkAdult(age) {
return age > 18;
}
Description
The some() method checks if any array elements pass a test (provided as a callback function).
The some() method executes the callback function once for each array element.
The some() method returns true (and stops) if the function returns
true for one of the array elements.
The some() method returns false if the function returns
false for all of the array elements.
The some() method does not execute the function for empty array elements.
The some() method does not change the original array.
Syntax
array.some(function(value, index, arr), this)
Parameters
Parameter
Description
function
Required.
A function to run for each array element.
A function to run for each array element.
Function parameters:
this
Optional. Default undefined.
A value passed to the function to be used as its "this" value.
value
Required.
The value of the current element.
The value of the current element.
index
Optional.
The index of the current element.
The index of the current element.
arr
Optional.
The array the current element belongs to.
The array the current element belongs to.
A value passed to the function to be used as its "this" value.
Return Value
Type
Description
A boolean
true if any of the array elements pass the test, otherwise false.
Example 2
<p>Input: <input type="number" id="toCheck" value="15"></p>
<button onclick="myFunction()">Test</button>
<p>Values higher: <span id="demo"></span></p>
<script>
const numbers = [4, 12, 16, 20];
function checkValue(x) {
return x > document.getElementById("toCheck").value;
}
function myFunction() {
document.getElementById("demo").innerHTML = numbers.some(checkValue);
}
</script>
Try it Yourself »
<button onclick="myFunction()">Test</button>
<p>Values higher: <span id="demo"></span></p>
<script>
const numbers = [4, 12, 16, 20];
function checkValue(x) {
return x > document.getElementById("toCheck").value;
}
function myFunction() {
document.getElementById("demo").innerHTML = numbers.some(checkValue);
}
</script>
Array Tutorials:
Browser Support
some() is an ECMAScript3 (JavaScript 1999) feature.
It is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |