useHotkey()

Basic usage

Listen to platform-independent hotkeys.

• key (string) - the key to listen to, a single lowercase character (like "k" or "s")
• callback (function) - will be called when user presses ⌘ + key on macOS, or Ctrl + key on win/linux
• returns an object with hotkeyText (string) which will be "⌘ + key" or "Ctrl + key" depending on platform

// listen to Ctrl/⌘ + K keypress
const { hotkeyText } = useHotkey("k", (e) => {
  // focus search input, for example
  inputRef.current?.focus();
});
// hotkeyText will be "Ctrl + K" or "⌘ + K"

// arrow keys work too (assumes a moveUp function exists)
const { hotkeyText } = useHotkey("ArrowUp", moveUp);
// hotkeyText will be "Ctrl + ↑" or "⌘ + ↑"

Options

For more control, pass a config object as the third parameter.

• ctrlOrCmd (default true) listens to Ctrl on Windows/Linux or ⌘ (Command) on MacOS
• shift (default false) listens to Shift (⇧) on all platforms
• alt (default false) listens to Alt (⌥) on all platforms
• preventDefault (default true) makes sure the keypress doesn't also trigger default behavior for browser, like typing in an input or another matching browser hotkey

// include Shift key
const { hotkeyText } = useHotkey("s", saveAll, {
  shift: true,
});
// hotkeyText will be "Ctrl + Shift + S" or "⌘ + ⇧ + S"

// just Escape key (no modifiers)
const { hotkeyText } = useHotkey("Escape", closePopup, { ctrlOrCmd: false });
// hotkeyText will be "Esc"

// Listen to "e" keypress (no modifiers) but allow focused input to also receive the keypress
const { hotkeyText } = useHotkey("e", callbackFn, {
  ctrlOrCmd: false,
  preventDefault: false,
});
// hotkeyText will be "E"

Sandbox

Move focus to the sandbox iframe (click inside) before testing hotkeys.

import useHotkey from "@intility/bifrost-react/hooks/useHotkey";
import Switch from "@intility/bifrost-react/Switch";
import { useState } from "react";

export default function HotkeyDemo() {
  const [on, setOn] = useState(false);
  const toggle = () => setOn(!on);
  const { hotkeyText } = useHotkey("s", toggle);
  return (
    <Switch
      label={`press ${hotkeyText} to toggle`}
      checked={on}
      onChange={() => {}}
    />
  );
}