Method ready

src/platforms/wasm/fs_wasm.cpp.hpp:96–99

    }

    bool ready(size_t pos) {
        fl::unique_lock<fl::mutex> lock(mMutex);
        return mData.size() == mCapacity || pos < mData.size();
    }

    size_t bytesRead() const {
        fl::unique_lock<fl::mutex> lock(mMutex);