evaluate method

Future evaluate(String command, { String? name, int? evalFlags, })

Evaluate js script.

Implementation

Future<dynamic> evaluate(
  String command, {
  String? name,
  int? evalFlags,
}) async {
  _ensureEngine();
  final evaluatePort = ReceivePort();
  final sendPort = await _sendPort!;
  final msg = {
    #type: #evaluate,
    #command: command,
    #name: name,
    #flag: evalFlags,
    #port: evaluatePort.sendPort,
  };
  // Inject host functions once, on the first evaluate that follows
  // setHostFunctions. Encoded as IsolateFunction refs (id + handle port).
  if (_hostFunctions.isNotEmpty && !_hostFunctionsBound) {
    msg[#functions] = _encodeData(_hostFunctions);
    _hostFunctionsBound = true;
  }
  sendPort.send(msg);
  final result = await evaluatePort.first;
  evaluatePort.close();
  if (result is Map && result.containsKey(#error)) {
    throw _decodeData(result[#error]);
  }
  return _decodeData(result);
}