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CSSStyleDeclaration JS Conversion


Filtre de tableau JavaScript()

Exemple 1

Renvoie un tableau de toutes les valeurs de ages[] qui sont 18 ans ou plus :

const ages = [32, 33, 16, 40];
const result = ages.filter(checkAdult);

function checkAdult(age) {
  return age >= 18;
}

Définition et utilisation

La filter()méthode crée un nouveau tableau rempli d'éléments qui réussissent un test fourni par une fonction.

La filter()méthode n'exécute pas la fonction pour les éléments vides.

La filter()méthode ne modifie pas le tableau d'origine.


Syntaxe

array.filter(function(currentValue, index, arr), thisValue)

Paramètres

Parameter Description
function() Required.
A function to run for each array element.
currentValue Required.
The value of the current element.
index Optional.
The index of the current element.
arr Optional.
The array of the current element.
thisValue Optional. Default undefined
A value passed to the function as its this value.

Valeur de retour

Taper La description
Un tableau Contenant les éléments qui réussissent le test.
Si aucun élément ne réussit le test, il renvoie un tableau vide.


Prise en charge du navigateur

filter() est une fonctionnalité ECMAScript5 (ES5).

ES5 (JavaScript 2009) entièrement pris en charge dans tous les navigateurs :

Chrome IE Edge Firefox Safari Opera
Yes 9-11 Yes Yes Yes Yes

Exemple 2

Renvoie les valeurs en âges[] qui sont supérieures à un nombre spécifique :

<p><input type="number" id="ageToCheck" value="30"></p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
const ages = [32, 33, 12, 40];

function checkAge(age) {
  return age > document.getElementById("ageToCheck").value;
}

function myFunction() {
  document.getElementById("demo").innerHTML = ages.filter(checkAge);
}
</script>