Fix worker cross domain issue

src/utils/getEnvironment.js

@@ -0,0 +1,10 @@
+module.exports = (key) => {
+  const env = {
+    type: (typeof window !== 'undefined') && (typeof window.document !== 'undefined') ? 'browser' : 'node',
+  };
+
+  if (typeof key === 'undefined') {
+    return env;
+  }
+  return env[key];
+};

src/utils/resolvePaths.js

@@ -0,0 +1,12 @@
+const isBrowser = require('./getEnvironment')('type') === 'browser';
+const resolveURL = isBrowser ? require('resolve-url') : s => s; // eslint-disable-line
+
+module.exports = (options) => {
+  const opts = { ...options };
+  ['corePath', 'workerPath'].forEach((key) => {
+    if (typeof options[key] !== 'undefined') {
+      opts[key] = resolveURL(opts[key]);
+    }
+  });
+  return opts;
+};