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DataView.prototype.byteOffset - JavaScript | MDN
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Utilisation de la propriété
Cette page a été traduite à partir de l'anglais par la communauté. Vous pouvez contribuer en rejoignant la communauté francophone sur MDN Web Docs.
DataView.prototype.byteOffset
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since juillet 2015.
La propriété byteOffset est un accesseur représentant le décalage, exprimé en octets, entre la vue et le début de l'objet ArrayBuffer ou SharedArrayBuffer correspondant.
Exemple interactif
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer, 12, 4); // From byte 12 for the next 4 bytes
console.log(view.byteOffset);
// Expected output: 12
Syntaxe
js
dataview.byteOffset;
Description
La propriété byteOffset est un accesseur/mutateur dont la fonction du mutateur vaut undefined. Cela signifie que la propriété n'est accesssible qu'en lecture seule. La valeur de la propriété est définie lors de la construction de l'objet DataView et ne peut pas être modifiée.
Exemples
Utilisation de la propriété byteOffset
js
var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.byteOffset; // 0 (aucun décalage)
var dataview2 = new DataView(buffer, 3);
dataview2.byteOffset; // 3 (décalage défini lors de la construction de la vue)
Spécifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-get-dataview.prototype.byteoffset |
Compatibilité des navigateurs
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