React state

When a query returns an object and you want to store it in React State, you can use GraphQL Zeus to have 100% type-safe objects in your state.
Here's an example schema:
type Query {
listUsers: [User!]
}
type User {
createdAt: String!
firstName: String!
lastName: String!
age: Int
username: String!
id: String!
}
You can use Zeus types to get the type of the objects received from a GraphQL Backend
import React, { useState } from 'react';
import { GraphQLTypes, InputType, Selector, Chain } from './zeus';
const userSelector = Selector('User')({
createdAt: true,
firstName: true,
lastName: true,
id: true,
});
type StoredUser = InputType<GraphQLTypes['User'], typeof userSelector>
const getFullName = (u:StoredUser) => u.firstName + ' ' + u.lastName
export const UsersList: React.FC = () => {
const [users, setUsers] = useState<Array<StoredUser>>([]);
useEffect(()=>{
Chain('https://yourschemaurl.com/graphql', {})('query')({
listUsers: userSelector
}).then( response => {
// 100% type-safe
setUsers(response.data)
})
};
},[])
return (
<div>
{users.map((u) => (
<div key={u.id} className="flex items-center">
<div className="font-bold p-4 flex-1">{getFullName(u)}</div>
<div className="p-4">{u.createdAt}</div>
</div>
))}
</div>
);
};
Last modified 3mo ago