React-Query: How to useQuery when button is clicked

React-Query is a powerful library that simplifies data fetching and caching in React applications. It provides a declarative API to manage and synchronize data between your components and the server. In this blog post, we will explore how to use the useQuery hook from React-Query when a button is clicked.

The useQuery hook allows us to fetch data from an API endpoint and handle the loading, error, and success states of the request. By default, the query is executed when the component is mounted. However, we can configure it to execute the query when a specific event occurs, such as a button click.

Step 1: Install React-Query

Before we start, make sure you have React-Query installed in your project. You can install it using npm or yarn:

npm install react-query

yarn add react-query

Step 2: Import the necessary dependencies

In your component file, import the necessary dependencies from React-Query:

import React from 'react';
import { useQuery } from 'react-query';

Step 3: Define your API request function

Next, define a function that will make the API request. This function will be called when the button is clicked. Here’s an example of a simple API request using fetch:

const fetchData = async () => {
  const response = await fetch('https://api.example.com/data');
  const data = await response.json();
  return data;
};

Step 4: Use the useQuery hook

Now, let’s use the useQuery hook to fetch the data when the button is clicked. We’ll define a state variable to keep track of the button click event and pass it as a dependency to the useQuery hook. This will ensure that the query is re-executed whenever the button is clicked.

const MyComponent = () => {
  const [buttonClicked, setButtonClicked] = React.useState(false);

  const { data, isLoading, isError, error } = useQuery(
    'myData',
    fetchData,
    { enabled: buttonClicked }
  );

  return (
    
      
      {isLoading && Loading...}
      {isError && Error: {error.message}}
      {data && Data: {JSON.stringify(data)}}
    
  );
};

In the code snippet above, we define a state variable buttonClicked and initialize it as false. When the button is clicked, we set buttonClicked to true, which triggers the re-execution of the query. The enabled option in the useQuery hook ensures that the query is only executed when buttonClicked is true.

Inside the component, we render a button that, when clicked, sets buttonClicked to true. We also render loading and error messages based on the query status, as well as the fetched data if available.

Conclusion

In this blog post, we have learned how to use the useQuery hook from React-Query to fetch data when a button is clicked. By leveraging the enabled option and a state variable, we can control when the query should be executed. This approach provides a flexible and efficient way to handle data fetching in React applications.

React-Query: How to useQuery when button is clicked