How to correctly catch change/focusOut event on text input in React.js?

How to correctly catch change/focusOut event on text input in React.js?

React.js is a popular JavaScript library used for building user interfaces. When working with text inputs in React, it’s important to handle events such as change and focusOut correctly. In this blog post, we will explore two solutions to correctly catch these events in React.js.

Solution 1: Using onChange and onBlur event handlers

The first solution involves using the onChange and onBlur event handlers provided by React. The onChange event is triggered whenever the value of the input changes, while the onBlur event is triggered when the input loses focus.

Here’s an example code snippet that demonstrates how to use these event handlers:

{`
import React, { useState } from 'react';

function TextInput() {
  const [value, setValue] = useState('');

  const handleChange = (event) => {
    setValue(event.target.value);
  };

  const handleBlur = () => {
    // Handle onBlur event here
  };

  return (
    
  );
}
`}

In the above code, we define a functional component called TextInput. We use the useState hook to manage the value of the input. The handleChange function is called whenever the input value changes, and it updates the state accordingly. The handleBlur function is called when the input loses focus, allowing you to handle the event as needed.

Solution 2: Using a custom event handler

If you prefer a more customized approach, you can create a custom event handler to catch the change and focusOut events. This approach gives you more control over how the events are handled.

Here’s an example code snippet that demonstrates how to create a custom event handler:

{`
import React, { useState } from 'react';

function TextInput() {
  const [value, setValue] = useState('');

  const handleEvent = (event) => {
    if (event.type === 'change') {
      setValue(event.target.value);
    } else if (event.type === 'blur') {
      // Handle onBlur event here
    }
  };

  return (
    
  );
}
`}

In the above code, we define a single event handler called handleEvent. It checks the type of the event and performs the appropriate action based on that. This allows you to handle both the change and focusOut events within the same function.

By using either of these solutions, you can correctly catch the change and focusOut events on text inputs in React.js. Choose the solution that best fits your needs and implement it in your project.

That’s it for this blog post! We hope you found these solutions helpful in handling change and focusOut events in React.js. Happy coding!