| CARVIEW |
Select Language
HTTP/2 200
content-type: text/html
x-guploader-uploadid: AAwnv3LIjcyF6Hi0U-k1r09tZnEo7CM1f5a04XIIjC7CwTugil9vj7JwKbldgog7vLo3U19a
cache-control: public, max-age=3600
expires: Tue, 14 Oct 2025 08:15:57 GMT
last-modified: Tue, 14 Oct 2025 01:13:28 GMT
etag: W/"a9ce305e5f2f3ffd63673c8be0d2483e"
x-goog-generation: 1760404408808471
x-goog-metageneration: 1
x-goog-stored-content-encoding: identity
x-goog-stored-content-length: 167425
x-goog-meta-goog-reserved-file-mtime: 1760402671
x-goog-hash: crc32c=qhh7qg==, md5=qc4wXl8vP/1jZzyL4NJIPg==
x-goog-storage-class: STANDARD
accept-ranges: none
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
alt-svc: clear
referrer-policy: strict-origin-when-cross-origin
x-content-type-options: nosniff
strict-transport-security: max-age=63072000
content-security-policy: default-src 'self'; script-src 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://www.googletagmanager.com/gtag/js assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; script-src-elem 'report-sample' 'self' 'wasm-unsafe-eval' https://www.google-analytics.com/analytics.js https://www.googletagmanager.com/gtag/js assets.codepen.io production-assets.codepen.io https://js.stripe.com 'sha256-XNBp89FG76amD8BqrJzyflxOF9PaWPqPqvJfKZPCv7M=' 'sha256-YCNoU9DNiinACbd8n6UPyB/8vj0kXvhkOni9/06SuYw=' 'sha256-PZjP7OR6mBEtnvXIZfCZ5PuOlxoDF1LDZL8aj8c42rw='; style-src 'report-sample' 'self' 'unsafe-inline'; object-src 'none'; base-uri 'self'; connect-src 'self' developer.allizom.org bcd.developer.allizom.org bcd.developer.mozilla.org updates.developer.allizom.org updates.developer.mozilla.org https://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com https://incoming.telemetry.mozilla.org https://observatory-api.mdn.allizom.net https://observatory-api.mdn.mozilla.net https://api.github.com/search/issues stats.g.doubleclick.net https://api.stripe.com; font-src 'self'; frame-src 'self' interactive-examples.mdn.mozilla.net interactive-examples.mdn.allizom.net mdn.github.io live-samples.mdn.mozilla.net live-samples.mdn.allizom.net *.mdnplay.dev *.mdnyalp.dev *.play.test.mdn.allizom.net https://v2.scrimba.com https://scrimba.com jsfiddle.net www.youtube-nocookie.com codepen.io survey.alchemer.com https://js.stripe.com; img-src 'self' data: *.githubusercontent.com *.googleusercontent.com *.gravatar.com mozillausercontent.com firefoxusercontent.com profile.stage.mozaws.net profile.accounts.firefox.com developer.mozilla.org mdn.dev interactive-examples.mdn.mozilla.net interactive-examples.mdn.allizom.net wikipedia.org upload.wikimedia.org https://mdn.github.io/shared-assets/ https://mdn.dev/ https://*.google-analytics.com https://*.googletagmanager.com www.gstatic.com; manifest-src 'self'; media-src 'self' archive.org videos.cdn.mozilla.net https://mdn.github.io/shared-assets/; child-src 'self'; worker-src 'self';
x-frame-options: DENY
origin-trial: AxVILwizhbMjxFeHOn1P3R8niO1RJY/smaK4B4d1rLzc1gTaxtXMSaTi+FoigYgCw40uFRDwFcEAeqDR+vVLOW4AAABfeyJvcmlnaW4iOiJodHRwczovL2RldmVsb3Blci5tb3ppbGxhLm9yZyIsImZlYXR1cmUiOiJQcml2YXRlQXR0cmlidXRpb25WMiIsImV4cGlyeSI6MTc0MjA3OTYwMH0=
x-cloud-trace-context: f4cafb127e36e29d0db340293f32e121
date: Tue, 14 Oct 2025 07:15:58 GMT
server: Google Frontend
via: 1.1 google
vary: Accept-Encoding
content-encoding: gzip
x-cache: miss
TypedArray.prototype.length - JavaScript | MDN
Toggle sidebar
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.
TypedArray.prototype.length
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 length est un accesseur qui permet de représenter la longueur, en nombre d'éléments, d'un tableau typé.
Exemple interactif
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(8);
const uint8 = new Uint8Array(buffer, 2);
console.log(uint8.length);
// Expected output: 6
Syntaxe
js
typedarray.length;
Description
La propriété length est un accesseur dont le mutateur correspondant vaut undefined, ce qui signifie qu'elle n'est accessible qu'en lecture. La valeur de la propriété est déterminée lors de la construction du TypedArray et ne peut pas être modifiée. Si le TypedArray n'utilise pas de byteOffset ou de length, le résultat correspondra à la longueur du ArrayBuffer correspondant. TypedArray est l'un des objets TypedArray.
Exemples
js
var tampon = new ArrayBuffer(8);
var uint8 = new Uint8Array(tampon);
uint8.length; // 8 (correspond à la longueur du tampon/buffer)
var uint8 = new Uint8Array(tampon, 1, 5);
uint8.length; // 5 (correspond à la longueur définie lors de la construction)
var uint8 = new Uint8Array(tampon, 2);
uint8.length; // 6 (correspond à la longueur en prenant en compte le décalage utilisé)
Spécifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-get-%typedarray%.prototype.length |
Compatibilité des navigateurs
Loading…