swarpc/dist/utils.js

Full type-safe RPC library for service worker -- move things off of the UI thread with ease!

// TODO: keep it in sync with web standards, how?
const transferableClasses = [
    MessagePort,
    ReadableStream,
    WritableStream,
    TransformStream,
    ArrayBuffer,
];
export function findTransferables(value) {
    if (value === null || value === undefined) {
        return [];
    }
    if (typeof value === "object") {
        if (ArrayBuffer.isView(value) || value instanceof ArrayBuffer) {
            return [value];
        }
        if (transferableClasses.some((cls) => value instanceof cls)) {
            return [value];
        }
        if (Array.isArray(value)) {
            return value.flatMap(findTransferables);
        }
        return Object.values(value).flatMap(findTransferables);
    }
    return [];
}