JavaScript Typed Arrays: Binary Data Processing in the Browser

Tue, 10 Sep 2024 00:00:00 +0900

JavaScript’s native Number type — an IEEE 754 double-precision float — is inefficient for binary data. Early solutions involved manual byte packing in plain arrays, which was slow and error-prone. ECMAScript 2015 formalized Typed Arrays, bringing C-like memory management to JavaScript. This three-layer architecture — ArrayBuffer, TypedArray views, and DataView — enables high-performance binary data processing in the browser and Node.js.

ArrayBuffer Foundation

ArrayBuffer represents a fixed-length raw binary buffer. It cannot be read or written directly — you must use a view:

Binary on Commentary of Takao

JavaScript Typed Arrays: Binary Data Processing in the Browser

ArrayBuffer Foundation