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react-hotkeys

React component to listen to keydown and keyup keyboard events, defining and dispatching keyboard shortcuts. Uses a fork of hotkeys.js for keydown detection of special characters. You give it a keymap of shortcuts & it bind it to the mousetrap singleton. The, it'll unbind it when the component unmounts.

Example

Install

npm i -S react-hot-keys

Demo

Preview demo.

• Codepen example.
• CodesandBox Example

import React from 'react';
import Hotkeys from 'react-hot-keys';

export default class HotkeysDemo extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      output: 'Hello, I am a component that listens to keydown and keyup of a',
    }
  }
  onKeyUp(keyName, e, handle) {
    console.log("test:onKeyUp", e, handle)
    this.setState({
      output: `onKeyUp ${keyName}`,
    });
  }
  onKeyDown(keyName, e, handle) {
    console.log("test:onKeyDown", keyName, e, handle)
    this.setState({
      output: `onKeyDown ${keyName}`,
    });
  }
  render() {
    return (
      <Hotkeys 
        keyName="shift+a,alt+s" 
        onKeyDown={this.onKeyDown.bind(this)}
        onKeyUp={this.onKeyUp.bind(this)}
      >
        <div style={{ padding: "50px" }}>
          {this.state.output}
        </div>
      </Hotkeys>
    )
  }
}

Functional Component Example

import React, { useState } from 'react';
import Hotkeys from 'react-hot-keys';

export default function HotkeysDemo() {
  const [output, setOutput] = useState('Hello, I am a functional component that listens to keydown and keyup');

  const onKeyUp = (keyName, e, handle) => {
    console.log("test:onKeyUp", e, handle);
    setOutput(`onKeyUp ${keyName}`);
  };

  const onKeyDown = (keyName, e, handle) => {
    console.log("test:onKeyDown", keyName, e, handle);
    setOutput(`onKeyDown ${keyName}`);
  };

  return (
    <Hotkeys 
      keyName="shift+a,alt+s" 
      onKeyDown={onKeyDown}
      onKeyUp={onKeyUp}
    >
      <div style={{ padding: "50px" }}>
        {output}
      </div>
    </Hotkeys>
  );
}

With useRef Example

import React, { useState, useRef } from 'react';
import Hotkeys from 'react-hot-keys';

export default function HotkeysWithRef() {
  const [output, setOutput] = useState('Press shift+a or alt+s to test');
  const hotkeysRef = useRef(null);

  const onKeyDown = (keyName, e, handle) => {
    console.log("onKeyDown", keyName, e, handle);
    console.log("Current isKeyDown state:", hotkeysRef.current?.isKeyDown);
    setOutput(`Key pressed: ${keyName}`);
  };

  const onKeyUp = (keyName, e, handle) => {
    console.log("onKeyUp", keyName, e, handle);
    console.log("Current isKeyDown state:", hotkeysRef.current?.isKeyDown);
    setOutput(`Key released: ${keyName}`);
  };

  return (
    <Hotkeys
      ref={hotkeysRef}
      keyName="shift+a,alt+s"
      onKeyDown={onKeyDown}
      onKeyUp={onKeyUp}
      allowRepeat={true}
    >
      <div style={{ padding: "50px", border: "1px solid #ccc" }}>
        <p>{output}</p>
        <p>Try pressing and holding shift+a or alt+s</p>
      </div>
    </Hotkeys>
  );
}

API

keyName

Supported keys ⇧, shift, option, ⌥, alt, ctrl, control, command, ⌘ .

⌘ Command()
⌃ Control
⌥ Option(alt)
⇧ Shift
⇪ Caps Lock
fn Function key is fn (not supported)
↩︎ return/enter space space keys

onKeyDown

Callback function to be called when user pressed the target buttons space space keys

onKeyUp

Callback function to be called when user key uped the target buttons

allowRepeat

allowRepeat?: boolean;

allowRepeat to allow auto repeating key down

disabled

disabled?: boolean;

Disable onKeyDown and onKeyUp events. Default: undefined

filter

INPUT SELECT TEXTAREA default does not handle. filter to return to the true shortcut keys set to play a role, flase shortcut keys set up failure.

 <Hotkeys 
   keyName="shift+a,alt+s" 
+   filter={(event) => {
+     return true;
+   }}
   onKeyDown={this.onKeyDown.bind(this)}
   onKeyUp={this.onKeyUp.bind(this)}
 />

Contributors

As always, thanks to our amazing contributors!

Made with action-contributors.

License

Licensed under the MIT License.