@loaders.gl/core/dist/es6/worker-utils/worker-utils.js

Framework-independent loaders for 3D graphics formats

import assert from '../utils/assert';
export function getTransferList(object, recursive = true, transfers = []) {
  if (!object) {} else if (object instanceof ArrayBuffer) {
    transfers.push(object);
  } else if (object.buffer && object.buffer instanceof ArrayBuffer) {
    transfers.push(object.buffer);
  } else if (recursive && typeof object === 'object') {
    for (const key in object) {
      getTransferList(object[key], recursive, transfers);
    }
  }

  return transfers;
}
const workerURLCache = new Map();
export function getWorkerURL(workerSource) {
  assert(typeof workerSource === 'string', 'worker source');

  if (workerSource.startsWith('url(') && workerSource.endsWith(')')) {
    return workerSource.match(/^url\((.*)\)$/)[1];
  }

  let workerURL = workerURLCache.get(workerSource);

  if (!workerURL) {
    const blob = new Blob([workerSource], {
      type: 'application/javascript'
    });
    workerURL = URL.createObjectURL(blob);
    workerURLCache.set(workerSource, workerURL);
  }

  return workerURL;
}
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