Category: React

Sometimes, we may run into the "Error: Parse Error: Expected corresponding JSX closing tag for input" error when developing React apps.

In this article, we’ll look at how to fix the "Error: Parse Error: Expected corresponding JSX closing tag for input" error when developing React apps.

Fix the "Error: Parse Error: Expected corresponding JSX closing tag for input" Error When Developing React Apps

To fix the "Error: Parse Error: Expected corresponding JSX closing tag for input" error when developing React apps, we should make sure the input element has a closing slash at the end.

For instance, we write:

import React from "react";

export default function App() {
  return <input />;
}

to add the slash before the closing bracket to close the input element.

Conclusion

To fix the "Error: Parse Error: Expected corresponding JSX closing tag for input" error when developing React apps, we should make sure the input element has a closing slash at the end.

Sometimes, we don’t want to render HTML in our React component.

In this article, we’ll look at which values React components can render other than HTML.

Is it Possible to Have React Components that Doesn’t Render HTML?

It’s possible to render values other than HTML in a component.

We can render one of the following values if we don’t a React component to render anything:

false
null
[]
<React.Fragment></React.Fragment>
<></>

We can render false, null, an empty array or an empty fragment in our component.

However, we can’t render undefined.

Conclusion.

It’s possible to render values other than HTML in a component.

We can render false, null, an empty array or an empty fragment in our component.

However, we can’t render undefined.

Sometimes, we want to get input text field values when enter key is pressed in React.

In this article, we’ll look at how to get input text field values when enter key is pressed in React.

Get Input Text Field Values When Enter Key is Pressed in React

To get input text field values when enter key is pressed in React, we can add an event handler for the keypress event into the input.

For instance, we write:

import React from "react";

export default function App() {
  return (
    <input
      onKeyPress={(ev) => {
        if (ev.key === "Enter") {
          ev.preventDefault();
          console.log(ev.target.value);
        }
      }}
    />
  );
}

to set the onKeyPress prop to a function that checks if the enter key is pressed by comparing 'Enter' against ev.key.

We prevent the default server side form submission behavior from happening with ev.preventDefault.

If it’s true. then we get the value that’s typed into the input box with ev.target.value.

Conclusion

To get input text field values when enter key is pressed in React, we can add an event handler for the keypress event into the input.

Sometimes, we want to handle double click events in a React component.

In this article, we’ll look at how to handle double click events in a React component.

Handle Double Click Events in a React Component

To handle double click events in a React component, we can use the regular click event handler and check how many clicks are done with the detail property.

For instance, we write:

import React from "react";

export default function App() {
  const handleClick = (e) => {
    switch (e.detail) {
      case 1:
        console.log("click");
        break;
      case 2:
        console.log("double click");
        break;
      case 3:
        console.log("triple click");
        break;
      default:
        return;
    }
  };

  return <button onClick={handleClick}>Click me</button>;
}

We have the handleClick function that checks the e.detail property to see how many clicks are done.

If it’s 2, then we know the user double clicked.

When we double click on the button, we should see 'double click' logged in the console.

Conclusion

To handle double click events in a React component, we can use the regular click event handler and check how many clicks are done with the detail property.

Sometimes, we want to prevent form submission in a React component.

In this article, we’ll look at how to prevent form submission in a React component.

Prevent Form Submission in a React Component

To prevent form submission in a React component, we should call the event.preventDefault method in our submit event handler function.

For instance, we write:

import React from "react";

export default function App() {
  const onSubmit = (event) => {
    event.preventDefault();
    console.log("submission prevented");
  };

  return (
    <form onSubmit={onSubmit}>
      <input />
      <input type="submit" />
    </form>
  );
}

We have a form with the onSubmit prop set to the onSubmit function so that the onSubmit function is our form’s submit event handler.

In the function, we call event.preventDefault to prevent the default submission behavior.

Therefore, when we click Submit, we see the 'submission prevented' message logged in the console.

Conclusion

To prevent form submission in a React component, we should call the event.preventDefault method in our submit event handler function.