use-hotkeys

Usage

use-hotkeys accepts as its first argument an array of hotkeys and handler tuples:

• hotkey - hotkey string e.g. ctrl+E, shift+alt+L, mod+S
• handler - event handler called when given combination was pressed
• options - object with extra options for hotkey handler

The second argument is a list of HTML tags:

• tagsToIgnore - HTML tag names that hotkeys will not trigger on
• triggerOnContentEditable - Whether shortcuts should trigger when based on contentEditable

import { useHotkeys } from '@asuikit/hooks';

function Demo() {
  // ctrl + J and ⌘ + J to toggle color scheme
  // ctrl + K and ⌘ + K to search
  useHotkeys([
    ['mod+J', () => console.log('Toggle color scheme')],
    ['ctrl+K', () => console.log('Trigger search')],
    ['alt+mod+shift+X', () => console.log('Rick roll')],
  ]);

  return null;
}

Targeting elements

use-hotkeys hook can work only with document element, you will need to create your own event listener if you need to support other elements. For this purpose package exports getHotkeyHandler function which should be used with onKeyDown:

import { useState } from 'react';
import { getHotkeyHandler } from '@asuikit/hooks';
import { notifications } from '@asuikit/notifications';
import { TextInput } from '@asuikit/core';

function Demo() {
  const [value, setValue] = useState("I've just used a hotkey to send a message");
  const handleSubmit = () => notifications.show({ title: 'Your message', message: value });
  const handleSave = () => notifications.show({ title: 'You saved', color: 'teal', message: value });

  return (
    <TextInput
      placeholder="Your message"
      label="Press ⌘+Enter or Ctrl+Enter when input has focus to send message"
      value={value}
      onChange={(event) => setValue(event.target.value)}
      onKeyDown={getHotkeyHandler([
        ['mod+Enter', handleSubmit],
        ['mod+S', handleSave],
      ])}
    />
  );
}

With getHotkeyHandler you can also add events to any dom node using .addEventListener:

import { getHotkeyHandler } from '@asuikit/hooks';

document.body.addEventListener(
  'keydown',
  getHotkeyHandler([
    ['mod+Enter', () => console.log('Submit')],
    ['mod+S', () => console.log('Save')],
  ])
);

Supported formats

• mod+S – detects ⌘+S on macOS and Ctrl+S on Windows
• ctrl+shift+X – handles multiple modifiers
• alt + shift + L – you can use whitespace inside hotkey
• ArrowLeft – you can use special keys using this format

Definition

function useHotkeys(
  hotKeyItem: Array<
    [
      hotkey: string,
      handler: (event: KeyboardEvent) => void,
      options?: { preventDefault?: boolean }
    ]
  >,
  tagsToIgnore?: string[]
): void;