GraphiQL crashes after adding a plugin

[michal-wajrak]

Adding a plugin to GraphiQL (in my case @graphiql/plugin-explorer), causes the /graphiql endpoint to crash.

Error shown in the console:

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'umdPlugin')
    at main.js:145:78
    at Array.map (<anonymous>)
    at render (main.js:145:36)

index.ts:

const app = Fastify({
	logger: true,
});

const prisma = new PrismaClient();

app.register(mercurius, {
	schema,
	resolvers,
	context: () => {
		return { prisma };
	},
	graphiql: {
		enabled: true,
		plugins: [
			{
				name: "explorerPlugin",
				umdUrl: "https://unpkg.com/@graphiql/plugin-explorer/dist/index.umd.js",
			},
		],
	},
});

Dependencies:
"mercurius": "14.1.0"
"fastify": "4.28.1",
"node": "20.13.1"

[mcollina]

Thanks for reporting! Would you like to send a Pull Request to address this issue? Remember to add unit tests.