@gqlts/runtime/src/error.ts

Gqlts runtime client

export class ClientError extends Error {
  constructor(errors?: readonly Error[]) {
    const message = ClientError.extractMessage(errors);
    super(errors ? `${message}\n${errors.map((error) => JSON.stringify(error, null, 2)).join('\n')}` : message);

    new.target.prototype.name = new.target.name;
    Object.setPrototypeOf(this, new.target.prototype);
    if (Error.captureStackTrace) Error.captureStackTrace(this, ClientError);
  }

  private static extractMessage(errors: readonly Error[] | undefined): string {
    try {
      return errors![0].message;
    } catch (e) {
      return `GraphQL Error`;
    }
  }
}