@vai-js-software/use-query v1.0.0

useQuery

• Introduction
• Installation
• useQuery
  • Parameters
  • Returned parameters
• generateApiClient
  • Parameters
• generateJwtApiClient
  • Parameters
• Examples
  • Example 1
  • Example 2
  • Example with JWT

1 - Introduction

This hook can be used to perform queries to an endpoint. Allows easy management of operations and query status.

It requires an Axios client. This library already provides the generateApiClient function which returns a client with a variable base url and an interceptor to send an authentication header. You may also create an axios client by your own.

2 - Installation

Install the library with npm install @vai-js-software/use-query.

At the upper level of the application you should also insert the ApiProvider component which requires an apiClient prop. It should be an Axios client which you can create by your own or use generateApiClient to generate one.

Here is an example:

import { generateApiClient, ApiProvider } from "@vai-js-software/use-query";
...
const apiClient = generateApiClient({
  baseUrl: "https://my.api.com/api/v1",
  authorizationHeader: "Authorization",
  authorizationPrefix: "Bearer "
})
...
root.render(
  <React.StrictMode>
    <ApiProvider apiClient={apiClient}>
      <App />
    </ApiProvider>
  </React.StrictMode >
);

3 - generateApiClient

This function returns an Axios client with the possibility to set a baseUrl, and an authorization header. It gets the authorization token from localStorage or sessionStorage with the key token.

3.1 - Parameters

3.2 - Our api client

This is what generateApiClient generates, you can use it as a base to create your own api client.

const apiClient = axios.create({
  baseURL: baseUrl,
  timeout: 5000,
  headers: {
    "Content-Type": "application/json",
    Accept: "application/json",
  },
});

apiClient.interceptors.request.use(
  function (config) {
    config.headers = config.headers || {};
    const token =
      localStorage.getItem("token") || sessionStorage.getItem("token");
    if (token) {
      config.headers[authorizationHeader] = `${authorizationPrefix}${token}`;
    }
    config.headers["Content-Type"] = "application/json";
    config.headers["Accept"] = "application/json";
    return config;
  },
  function (error) {
    return Promise.reject(error);
  }
);

apiClient.interceptors.response.use(
  function (response) {
    return response;
  },
  function (error) {
    return Promise.reject(error);
  }
);

4 - generateJwtApiClient

This function returns an Axios client with the possibility to set a baseUrl, and an authorization header. It gets the authorization token from localStorage or sessionStorage with the key token.

4.1 - Parameters

5 - useQuery

This hook performs only one query, if you have to perform multiple queries in parallel you can call multiple times useQuery or use useMultipleQueries as described below.

5.1 - Parameters

5.2 - Returned parameters

6 - useMultipleQueries

This hooks allows to perform multiple queries in parallel with a syntax similar to that of useQuery.

6.1 - Parameters

6.2 - Returned parameters

7 - Examples

7.1 - Example 1

const { isLoading, executeQuery } = useQuery({
  url: "accounts/login/", // If baseUrl has been set, you can use a relative url. It also accepts absolute urls.
  method: "POST",
  executeImmediately: false,
  onSuccess: (response) => {
    console.log(response);
  },
  onUnauthorized: (response) => {
    console.log(response);
  },
});

const submitForm(value) => {
  executeQuery(value);
}

if(isLoading)
  return <Loader />
else
  return <Form submitForm={submitForm} />

7.2 - Example 2

const { isLoading, isSuccess, data, error } = useQuery({
  url: "api/v1/userinfo/",
  method: "GET",
  executeImmediately: true,
});

if (isLoading) return <Loader />;
else if (isSuccess) return <UserInfo data={data} />;
else return <Error error={error} />;

6.3 - Example with useMultipleQueries

const { queries } = useMultipleQueries({
  queries: {
    query1: {
      url: "https://jsonplaceholder.typicode.com/todos/1",
      onSuccess: (response) => {
        console.log("query1", response);
      },
    },
    query2: {
      url: "https://jsonplaceholder.typicode.com/todos/2",
      onError: (error) => {
        console.log("query2 error", error);
      },
      onSuccess: (response) => {
        console.log("query2 success", response);
      },
    },
    query3: {
      url: "https://wrongdomain/todos/3",
      onError: (error) => {
        console.log("query3", error);
      },
    },
  },
  executeImmediately: true,
  onEnd: () => {
    console.log("All done");
  },
});

7.3 - Example with JWT

import axios from "axios";
import { generateJwtApiClient, ApiProvider } from "@vai-js-software/use-query";
...
const apiClient = generateJwtApiClient({
  baseUrl: "https://my.api.com/api/v1",
  authorizationHeader: "Authorization",
  authorizationPrefix: "Bearer ",
  refreshTokenFunction: async ({accessToken, refreshToken}) => {
    const response = await axios.post("https://example.com/refresh", {accessToken, refreshToken})
    const updatedAccessToken = response.data.accessToken;
    const updatedRefreshToken = response.data.refreshToken;
    return [updatedAccessToken, updatedRefreshToken];
  }
})
...
root.render(
  <React.StrictMode>
    <ApiProvider apiClient={apiClient} onUnauthorized={(response) => {console.log(response)}}>
      <App />
    </ApiProvider>
  </React.StrictMode >
);