brew install deno 

deno install --allow-read --allow-run --allow-write -f --unstable https://deno.land/x/denon/denon.ts 

├── denon.json ├── src │ ├── index.ts │ └── resolvers │ ├── index.ts │ └── user.ts └── tsconfig.json 

denon init 

{ "$schema": "https://deno.land/x/denon/schema.json", "scripts": { "start": "deno run --allow-net ./src/index.ts" } } 

import { Application } from 'https://deno.land/x/oak/mod.ts' import { GraphQLService } from './resolvers/index.ts' const app = new Application() app.use(async (ctx, next) => { await next() const rt = ctx.response.headers.get('X-Response-Time') console.log(`${ctx.request.method} ${ctx.request.url} - ${rt}`) }) app.use(async (ctx, next) => { const start = Date.now() await next() const ms = Date.now() - start ctx.response.headers.set('X-Response-Time', `${ms}ms`) }) await app.use( await GraphQLService.routes(), await GraphQLService.allowedMethods() ) console.log('Server start at http://localhost:8080') console.log('Playgroud at http://localhost:8080/graphql') await app.listen({ port: 8080 }) 

import { gql } from 'https://deno.land/x/oak_graphql/mod.ts' export const resolvers = { Query: { getUser: (parent: any, { id }: any, context: any, info: any) => { console.log('id', id, context) return { firstName: 'wooseok', lastName: 'lee', } }, }, Mutation: { setUser: ( parent: any, { firstName, lastName }: any, context: any, info: any ) => { console.log('input:', firstName, lastName) return { done: true, } }, }, } export default gql` type User { firstName: String lastName: String } input UserInput { firstName: String lastName: String } type ResolveType { done: Boolean } type Query { getUser(id: String): User } type Mutation { setUser(input: UserInput!): ResolveType! } ` 

import { applyGraphQL } from 'https://deno.land/x/oak_graphql@0.1/mod.ts' import user, { resolvers as UserResolvers } from './user.ts' export const GraphQLService = await applyGraphQL({ typeDefs: [await user], resolvers: [await UserResolvers], })