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.