chore: demo for graphql & express

examples/graphql/express/.gitignore

@@ -0,0 +1,28 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+
+pnpm-lock.yaml
+yarn.lock
+package-lock.json

examples/graphql/express/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "express",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.19.2",
+    "express-graphql": "^0.12.0",
+    "graphql": "^15.9.0"
+  }
+}

examples/graphql/express/server.js

@@ -0,0 +1,32 @@
+const { buildSchema } = require('graphql')
+const express = require('express')
+const { graphqlHTTP } = require('express-graphql')
+
+// 使用 GraphQL schema language 构建一个 schema
+const schema = buildSchema(`
+  type Query {
+    hello: String
+  }
+`)
+
+// 根节点为每个 API 入口端点提供一个 resolver 函数
+const resolver = {
+  hello: () => {
+    return 'Hello world!'
+  },
+}
+
+const app = express()
+
+app.use(
+  '/graphql',
+  graphqlHTTP({
+    schema: schema,
+    rootValue: resolver,
+    graphiql: true,
+  }),
+)
+
+app.listen(4000)
+
+console.log('Running a GraphQL API server at http://localhost:4000/graphql')