ReactJS and Axios Tutorial

React Hooks and State

• The code uses useState hook to create state variables for customerNumber, customerName, flowerName, customerAddress, and responseMessage.
• The initial value of each state variable is an empty string.

Handle Update Function

• The handleUpdate function is an async function that updates a record in the database.
• It takes the current state values of customerName, flowerName, customerAddress, and customerNumber and creates a new object updatedRecord.
• It uses axios.put to send a PUT request to <a href="http://localhost:3030/updatebycustomernumber/$%7BcustomerNumber">http://localhost:3030/updatebycustomernumber/${customerNumber</a>} with the updatedRecord as the request body.
• If the request is successful, it sets the responseMessage state to the response data from the server.
• If the request fails, it catches the error and sets the responseMessage state to an error message.

Handle Search Function

• The handleSearch function is an async function that searches for a customer record in the database.
• It takes the current state value of customerNumber and uses axios.get to send a GET request to <a href="http://localhost:3030/searchcustomernumber/$%7BcustomerNumber">http://localhost:3030/searchcustomernumber/${customerNumber</a>}.
• If the request is successful, it checks if the response data contains a CustomerName property.
• If the property exists, it updates the state values of customerName, flowerName, and customerAddress with the corresponding values from the response data.
• If the property does not exist, it sets the responseMessage state to a "Customer not found" message and resets the state values of customerName, flowerName, and customerAddress to empty strings.
• If the request fails, it catches the error and sets the responseMessage state to an error message.

JSX Elements

• The code returns JSX elements that include input fields for customerNumber, customerName, flowerName, and customerAddress.
• The input fields have onChange event handlers that update the corresponding state variables.
• The code also includes a submit button that triggers the handleUpdate function when clicked.
• The responseMessage state is displayed below the input fields.

Learn about ReactJS and Axios by updating customer records. Understand how to use React hooks to manage state and Axios for making API calls.