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JavaScript-array concat()

Voorbeelden

Voeg twee arrays samen:

const arr1 = ["Cecilie", "Lone"];
const arr2 = ["Emil", "Tobias", "Linus"];
const children = arr1.concat(arr2);

Voeg drie arrays samen:

const arr1 = ["Cecilie", "Lone"];
const arr2 = ["Emil", "Tobias", "Linus"];
const arr3 = ["Robin"];
const children = arr1.concat(arr2,arr3);

Definitie en gebruik

De concat()methode voegt twee of meer arrays samen (samengevoegd).

De concat()methode retourneert een nieuwe array, die de samengevoegde arrays bevat.

De concat()methode verandert niets aan de bestaande arrays.


Syntaxis

array1.concat(array2, array3, ..., arrayX)

Parameters:

Parameter Description
array2
array3
...
arrayX
Required.
The arrays to be joined.

Winstwaarde

Type Beschrijving
een arrayDe samengevoegde arrays.


Browserondersteuning

concat() is een ECMAScript1 (ES1)-functie.

ES1 (JavaScript 1997) wordt volledig ondersteund in alle browsers:

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