"Troubleshooting alert: Encounter an error message saying 'process is not defined' when attempting to load the grpc package using proto-loader and grpc-js within a

Looking for help with integrating a typescript Vue.js component that needs to make a grpc call.

The proto file can be found here: https://github.com/floydjones1/ts-node-grpc/blob/main/proto/random.proto

Here is the component.vue code snippet:

<script setup lang="ts">
import path from 'path'
import { ref } from "vue";
import * as grpcJs from "@grpc/grpc-js";
import * as protoLoader from "@grpc/proto-loader";
import type { ProtoGrpcType } from "./proto/random";

const PROTO_FILE = './proto/random.proto'
const packageDefinition = protoLoader.loadSync(path.resolve(__dirname, PROTO_FILE))
const grpcObject = (grpcJs.loadPackageDefinition(packageDefinition) as unknown) as ProtoGrpcType
</script>

When running the page with this component, an error occurs:

ReferenceError: process is not defined
    node_modules grpc/grpc-js/build/src/logging.js@http://localhost:5173/node_modules/.vite/deps/@grpc_grpc-js.js?v=ed969e6f:79
    __require http://localhost:5173/node_modules/.vite/deps/chunk-RSJERJUL.js?v=ed969e6f:3
    node_modules grpc/grpc-js/build/src/metadata.js@http://localhost:5173/node_modules/.vite/deps/@grpc_grpc-js.js?v=ed969e6f:185
    __require http://localhost:5173/node_modules/.vite/deps/chunk-RSJERJUL.js?v=ed969e6f:3
    node_modules grpc/grpc-js/build/src/call-credentials.js@http://localhost:5173/node_modules/.vite/deps/@grpc_grpc-js.js?v=ed969e6f:410
    __require http://localhost:5173/node_modules/.vite/deps/chunk-RSJERJUL.js?v=ed969e6f:3
    node_modules grpc/grpc-js/build/src/index.js@http://localhost:5173/node_modules/.vite/deps/@grpc_grpc-js.js?v=ed969e6f:9983
    __require http://localhost:5173/node_modules/.vite/deps/chunk-RSJERJUL.js?v=ed969e6f:3
    <anonymous> http://localhost:5173/node_modules/.vite/deps/@grpc_grpc-js.js?v=ed969e6f:10144

The grpc call works outside of Vue.js. Any suggestions on how to resolve this issue?

typescriptvue.jsgrpcgrpc-js

Answer №1

After some investigation, I came to the realization that grpc-js is designed to function on the backend and does not support browser environments. In contrast, vue.js components are meant to operate within browsers.

To address this issue, one option is to replace grpc-js with grpc-web. Alternatively, you could switch from grpc-js to using protobuf-ts/plugin in conjunction with @protobuf-ts/grpcweb-transport, as they also cater to browser environments. It's worth noting that even though grpc-web is a viable solution, it still has its drawbacks, which can be found at https://github.com/grpc/grpc-web/issues/1242.

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