😢 Such Sad, Very Error! 😰
${error?.message}👩🚀 Haunted Hooks for Apollo GraphQL 🌛
npm install @apollo-elements/haunted
👾 Haunted Hooks for Apollo GraphQL 🚀
[![View Live Demo][1]][2]
[1]: https://img.shields.io/badge/Live%20Demo-WebComponents.dev-informational?style=for-the-badge
[2]: https://webcomponents.dev/edit/UJQKqT0Mb6s5qvEVsnjWsrc/index.js
> 🔎 Read the Full API Docs 🔎
Apollo Elements haunted hooks are distributed through npm, the node package manager. To install a copy of the latest version in your project's node_modules directory, install npm on your system then run the following command in your project's root directory:
``bash`
npm install --save @apollo-elements/haunted
> See our docs on setting up Apollo client so your components can fetch their data.
This package provides useMutation, useQuery, and useSubscription hooks.
hook.First, let's define our component's GraphQL query.
`graphql
query HelloQuery {
helloWorld {
name
greeting
}
}
`> Read our docs on working with GraphQL files during development and in production for more info, and be sure to read about generating TypeScript types from GraphQL to enhance your developer experience and reduce bugs.
Next, we'll define our UI component with the
hook. Import the hook and helpers, your query, and the types:
Imports
`ts
import { useQuery, component, html } from '@apollo-elements/haunted';import { HelloQuery } from './Hello.query.graphql';
declare global {
interface HTMLElementTagNameMap {
'hello-query': HTMLElement
}
}
`Then define your component's template function.
ts
function Hello() {
const { data, error, loading } = useQuery(HelloQuery); const greeting = data?.helloWorld.greeting ?? 'Hello';
const name = data?.helloWorld.name ?? 'Friend';
return html
${error?.message}${greeting}, ${name}!
;
}customElements.define('hello-query', component(Hello));
`$3
Mutations are how you affect change on your graph. Define a mutation in graphql.
graphql
mutation UpdateUser($username: String, $haircolor: String) {
updateUser(username: $username, haircolor: $haircolor) {
nickname
}
}
`Then import
and the haunted API along with your data types.
Imports
`ts
import { useMutation, useState, component, html } from '@apollo-elements/haunted';import { UpdateUserMutation } from './UpdateUser.mutation.graphql';
declare global {
interface HTMLElementTagNameMap {
'update-user': HTMLElement;
}
}
`Then to define your component's template function.
ts
function UpdateUser() {
const [username, setUsername] = useState('');
const [haircolor, setHaircolor] = useState('Black');
const [updateUser, { data }] = useMutation(UpdateUserMutation); const variables = { username, haircolor };
const nickname = data?.updateUser?.nickname ?? 'nothing';
return html
;
}
customElements.define('update-user', component(UpdateUser));
`
Subscriptions let you update your front end with real-time changes to the data graph.
`graphql`
subscription NewsFlash {
news
}
`ts
import { useSubscription, component, html } from '@apollo-elements/haunted';
import { NewsFlashSubscription } from './NewsFlash.subscription.graphql';
declare global {
interface HTMLElementTagNameMap {
'news-flash': HTMLElement;
}
}
`
`ts
function NewsFlash() {
const { data } = useSubscription(NewsFlashSubscription);
return html
Latest News: ${data.news}
;
}
customElements.define('news-flash', component(NewsFlashSubscription));
`
If you want your haunted components to register with the closest element, you have to write them using the function keyword and pass this as the hostElement option.
`js`
function Connected() {
const { data } = useQuery(ConnectedQuery, {
hostElement: this,
});
}
That way, will be able to find your element in the DOM tree and connect to the controller which powers the hook.
