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    1.6.10 • Public • Published

    Pure JavaScript gRPC Client


    Node 12 is recommended. The exact set of compatible Node versions can be found in the engines field of the package.json file.

    npm install @grpc/grpc-js


    Documentation specifically for the @grpc/grpc-js package is currently not available. However, documentation is available for the grpc package, and the two packages contain mostly the same interface. There are a few notable differences, however, and these differences are noted in the "Migrating from grpc" section below.


    • Clients
    • Automatic reconnection
    • Servers
    • Streaming
    • Metadata
    • Partial compression support: clients can decompress response messages
    • Pick first and round robin load balancing policies
    • Client Interceptors
    • Connection Keepalives
    • HTTP Connect support (proxies)

    If you need a feature from the grpc package that is not provided by the @grpc/grpc-js, please file a feature request with that information.

    This library does not directly handle .proto files. To use .proto files with this library we recommend using the @grpc/proto-loader package.

    Migrating from grpc

    @grpc/grpc-js is almost a drop-in replacement for grpc, but you may need to make a few code changes to use it:

    • If you are currently loading .proto files using grpc.load, that function is not available in this library. You should instead load your .proto files using @grpc/proto-loader and load the resulting package definition objects into @grpc/grpc-js using grpc.loadPackageDefinition.
    • If you are currently loading packages generated by grpc-tools, you should instead generate your files using the generate_package_definition option in grpc-tools, then load the object exported by the generated file into @grpc/grpc-js using grpc.loadPackageDefinition.
    • If you have a server and you are using Server#bind to bind ports, you will need to use Server#bindAsync instead.
    • If you are using any channel options supported in grpc but not supported in @grpc/grpc-js, you may need to adjust your code to handle the different behavior. Refer to the list of supported options below.
    • Refer to the detailed package comparison for more details on the differences between grpc and @grpc/grpc-js.

    Supported Channel Options

    Many channel arguments supported in grpc are not supported in @grpc/grpc-js. The channel arguments supported by @grpc/grpc-js are:

    • grpc.ssl_target_name_override
    • grpc.primary_user_agent
    • grpc.secondary_user_agent
    • grpc.default_authority
    • grpc.keepalive_time_ms
    • grpc.keepalive_timeout_ms
    • grpc.keepalive_permit_without_calls
    • grpc.service_config
    • grpc.max_concurrent_streams
    • grpc.initial_reconnect_backoff_ms
    • grpc.max_reconnect_backoff_ms
    • grpc.use_local_subchannel_pool
    • grpc.max_send_message_length
    • grpc.max_receive_message_length
    • grpc.enable_http_proxy
    • grpc.default_compression_algorithm
    • grpc.enable_channelz
    • grpc.dns_min_time_between_resolutions_ms
    • grpc-node.max_session_memory
    • channelOverride
    • channelFactoryOverride

    Some Notes on API Guarantees

    The public API of this library follows semantic versioning, with some caveats:

    • Some methods are prefixed with an underscore. These methods are internal and should not be considered part of the public API.
    • The class Call is only exposed due to limitations of TypeScript. It should not be considered part of the public API.
    • In general, any API that is exposed by this library but is not exposed by the grpc library is likely an error and should not be considered part of the public API.
    • The grpc.experimental namespace contains APIs that have not stabilized. Any API in that namespace may break in any minor version update.




    npm i @grpc/grpc-js


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    • murgatroid99
    • grpc-packages
    • nicolasnoble