一、新建入口页面
在主目录下建立public/index.html文件
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| html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documenttitle>
head>
<body>
<button onclick="getData()">获取数据button>
body>
<script>
function getData() {
const query = `
query Account($username: String, $city: String) {
account(username: $username) {
name
age
sex
salary(city: $city)
}
}
`
const variables = {username: 'four', city: 'chongqing'}
fetch('/graphql', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Accept': 'application/json',
},
body: JSON.stringify({
query,
variables: variables,
})
})
.then(res => res.json())
.then(data => console.log(data));
}
script>
html>
|
二、配置静态文件
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| app.use(express.static('public'))
|
三、graphql.js
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| const express = require('express');
const {buildSchema} = require('graphql');
const graphqlHTTP = require('express-graphql');
const schema = buildSchema(`
type Account {
name: String
age: Int
sex: String
department: String
salary(city: String): Int
}
type Query {
getClassMates(classNo: Int!): [String]
account(username: String): Account
}
`);
const root = {
getClassMates({ classNo }) {
const obj = {
31: ['h', 'l', 'c'],
61: ['m', 'n', 'j']
}
return obj[classNo];
},
account({ username }) {
const name = username;
const sex = 'female';
const age = 18;
const department = 'school';
const salary = ({city}) => {
if(city == "beijing" || city == "shanghai" || city == "guangzhou" || city == "shenzhen") {
return 10000;
}
return 3000;
}
return {
name,
sex,
age,
department,
salary
}
}
}
const app = express();
app.use('/graphql', graphqlHTTP({
schema: schema,
rootValue: root,
graphiql: true
}))
app.use(express.static('public'))
app.listen(3000);
|
四、使用
node启动本文件后，在本地页面内的网络请求中可以看到相关数据。
