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CSSStyleDeclaration JS Conversion


JavaScript Array some()

Voorbeeld 1

Kyk of enige waardes meer as 18 is:

const ages = [3, 10, 18, 20];

ages.some(checkAdult);
function checkAdult(age) {
  return age > 18;
}

Definisie en gebruik

Die some()metode kontroleer of enige skikkingselemente 'n toets slaag (verskaf as 'n funksie).

Die some()metode voer die funksie een keer vir elke skikkingselement uit:

  • As die funksie true gee , some()gee dit waar en stop.
  • As die funksie vals gee , some()gee dit onwaar en stop.

Die some()metode voer nie die funksie vir leë skikkingselemente uit nie.

Die some()metode verander nie die oorspronklike skikking nie.


Sintaksis

array.some(function(value, index, arr), this)

Grense

Parameter Description
function Required.
A function to run for each array element.
Function parameters:
value Required.
The value of the current element.
index Optional.
The index of the current element.
arr Optional.
The array the current element belongs to.
this Optional. Default undefined.
A value passed to the function to be used as its "this" value.

Terugkeerwaarde

Tik Beskrywing
'n Boole trueindien enige van die aray-elemente die toets slaag, anders false.


Blaaierondersteuning

some() is 'n ECMAScript3 (ES3) kenmerk.

ES3 (JavaScript 1999) word ten volle ondersteun in alle blaaiers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes

Voorbeeld 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>