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Global keyboards events on React

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by vsasikalabe dot icon Updated: Feb 17, 2023

Solution Kit Solution Kit  

An event that generates a keystroke occurs in a component. When a key is pressed, typed, or released, this event is occurred by an object (such as a text field). A user interacts with the user application by pressing either the key on the keyboard or by using the mouse. A programmer must know which key the user has pressed on the keyboard or whether the mouse is, pressed, moved, or released. This is known as 'events'. 


The keypress event is activated when a key that generates a character value is pressed down. For example, keys that generate a character value are numeric, alphabetic, and punctuation keys. And also, examples of keys that don't generate a character value are modifier keys such as Shift, Alt Ctrl, or Meta. 

The following points are the order of event firing: 

  • onKeyDown − when the user presses the key, this will be activated. 
  • onKeyPress − when the user has pressed the key, this will be activated. 
  • onKeyUp − when the user releases the key, this will be fired. 

To handle the key press in React, we use keypress. It can execute actions for any event involving the keyboard if you want to call a function when there is any key press or only if a specific key is pressed and passed as an attribute in elements. 


Here is an example of how to do global keyboards events on Reactjs: 

Preview of the output that you will get on running this code from your IDE

Code:

In this solution we use the React library.

Global keyboards events on React

Lines of Code : 24dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
class App extends React.Component {
  state = { lastPressedKey: null };

  componentDidMount() {
    window.addEventListener("keydown", this.handleKeyPress);
  }

  componentWillUnmount() {
    window.removeEventListener("keydown", this.handleKeyPress);
  }

  handleKeyPress = event => {
    this.setState({ lastPressedKey: event.key });
  };

  render() {
    return <div>Key last pressed: {this.state.lastPressedKey}</div>;
  }
}

ReactDOM.render(<App />, document.getElementById("root"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="root"></div>

Instructions

Follow the steps carefully to get the output easily.

  1. Install the Node.js and React on your IDE(preferable Visual Studio Code).
  2. Create React Application using npx create-react-app foldername.
  3. cd foldername.
  4. Open the folder in IDE.
  5. Copy the code using "copy" button above and paste (line no 1 to 21)it in App.js file(remove the earlier code from App.js).Copy html code (line no 22 and 23) and paste it in the index.html file within the body tag.
  6. Import React and React DOM.Add export default App to the last line of the code in App.js.
  7. Open the terminal from IDE.
  8. npm start to run the file.


I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.


I found this code snippet by searching for 'Global keyboards events on React 'in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in VS Code 1.73.1 version.
  2. The solution is tested on Nodejs 16.14.2 version.
  3. react 18.2.0 version


Using this solution, we are able to do global keyboards events on React with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to do global keyboards events on React.

Dependent Libraries

create-react-appby facebook

JavaScript doticonstar image 99898 doticonVersion:v5.0.1doticon
License: Permissive (MIT)

Set up a modern web app by running one command.

Support
    Quality
      Security
        License
          Reuse

            create-react-appby facebook

            JavaScript doticon star image 99898 doticonVersion:v5.0.1doticon License: Permissive (MIT)

            Set up a modern web app by running one command.
            Support
              Quality
                Security
                  License
                    Reuse

                      You can search for any dependent library on kandi like 'react'.

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