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Other References

CSSStyleDeclaration JS Conversion


HTML-DOM-Attribute item()

Beispiel

Holen Sie sich den Namen der ersten Attribute eines Elements:

const nodeMap = document.getElementById("myDiv").attributes;
let name1 = nodeMap.item(0).name;
let name2 = nodeMap.item(1).name;
const nodeMap = document.getElementById("myDiv").attributes;
let name1 = nodeMap[0].name;
let name2 = nodeMap[1].name;

Weitere Beispiele unten.


Definition und Verwendung

Die item()Methode gibt ein Attribut (nach Index) aus einer NamedNodeMap zurück.

Notiz

Die Knoten werden so sortiert, wie sie im Quellcode erscheinen. Der Index beginnt bei 0.

Siehe auch:

Die Nodemap. Länge Eigenschaft

Die Nodemap. getNamedItem-Methode



Syntax

namednodemap.item(index)

or simply:

namednodemap[index]

Parameter

Parameter Description
index Required.
The index of the attribute node in the NamedNodeMap.

Rückgabewert

Typ Beschreibung
Ein KnotenDer Attributknoten am angegebenen Index.
Oder nullwenn die Indexnummer außerhalb des zulässigen Bereichs liegt.

Mehr Beispiele

Ändern Sie die Klasse (die Farbe) eines Elements:

document.getElementById("myDiv").attributes.item(1).value = "class2";

Ändern Sie die Klasse (die Farbe) eines Elements:

document.getElementById("myDiv").attributes[1].value = "class2";

Browser-Unterstützung

attributes.item()ist eine Funktion von DOM Level 1 (1998).

Es wird in allen Browsern vollständig unterstützt:

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