AWS, JavaScript, React - Deploy Web Apps on the Cloud - Validating Forms in React - Part 4

The video tutorial discusses how to manage input field validation in a form using React. It begins by addressing the issue of input fields being highlighted in red immediately upon form load, which some users may not prefer. The tutorial then explains how to use the on blur event to change the field color to red only when an error occurs. It covers setting up a React state object to track which fields have been interacted with and updating this state using a handle blur function. The tutorial also describes how to display error messages conditionally using a show error function and concludes with code optimization tips.

What is the initial issue with the red rectangle highlight in the form?

• The red rectangle does not appear at all.

• The red rectangle appears only when the form is closed.

• The red rectangle appears only after form submission.

• The red rectangle appears immediately when the form is accessed.

How does the 'on blur' event help in managing the red rectangle highlight?

• It removes the rectangle completely.

• It triggers the rectangle to appear only when the input field loses focus.

• It changes the rectangle color to green.

• It makes the rectangle appear only when the form is submitted.

What is the purpose of the 'touched' object in the React state?

• To store the values of the input fields.

• To track whether an input field has been interacted with.

• To change the color of the input fields.

• To reset the form to its initial state.

What is a crucial step when updating the state in React?

• Avoid using any events to update the state.

• Use only global variables for state management.

• Ensure not to interfere with existing state values.

• Always reset the state to its initial values.

What does the 'showError' function determine?

• When to reset the form.

• When to display the red rectangle.

• When to change the rectangle color to blue.

• When to submit the form.

What is the benefit of simplifying the 'showError' function?

• It makes the code longer and more complex.

• It reduces the number of lines and makes the code more compact.

• It removes all error handling from the code.

• It changes the functionality of the form.

What happens when you delete an input field and click away?

• The input field turns green.

• The input field remains unchanged.

• The input field turns red to indicate an error.

• The input field disappears.