use-hotkeys.md

useHotkeys

Adds one new behavior to your Stimulus controller : useHotkeys

This behavior can be used to register hotkeys using the hotkeys-js library. To use it, do the following:

1. Install the hotkeys-js peer dependency:

$ yarn add hotkeys-js

2. Define hotkeys and respective handlers and pass them as an argument to useHotkeys.

Reference

useHotkeys(controller, options)

controller : a Stimulus Controller (usually 'this')

options : Hotkey definitions, in simple or advanced format (see examples below)

simple:

{ [hotkey: string]: [handler: KeyHandler, element: HTMLElement] }

advanced:

{
  hotkeys?: {
    [hotkey: string]: {
      handler: Keyhandler
      options: {
        scope?: string
        element?: HTMLElement
        keyup?: boolean
        keydown?: boolean
        splitKey?: string
      }
    }
  }
  filter?: (e: KeyboardEvent) => boolean
}

Usage

Simple Hotkey Definition

import { Controller } from 'stimulus'
import { useHotkeys } from 'stimulus-use'

export default class extends Controller {
  connect() {
    useHotkeys(this, {
      '/': [this.singleKeyHandler],
      'cmd+a': [this.metaKeyHandler],
      b: [this.inputHandler],
      e: [this.inputHandler, this.inputTarget]
    })
  }
}

Advanced Hotkey Definition

import { Controller } from 'stimulus'
import { useHotkeys } from 'stimulus-use'

export default class extends Controller {
  connect() {
    useHotkeys(this, {
      hotkeys: {
        '/': {
          handler: this.singleKeyHandler
        },
        'cmd+a': {
          handler: this.metaKeyHandler
        },
        f: {
          handler: this.scopeHandler,
          options: {
            scope: 'files'
          }
        },
        b: {
          handler: this.inputHandler
        },
        c: {
          handler: this.keyUpHandler,
          options: {
            keydown: false,
            keyup: true
          }
        },
        'ctrl-d': {
          handler: this.splitKeyHandler,
          options: {
            splitKey: '-'
          }
        }
      },
      filter: this.filter
    })
  }

  singleKeyHandler(e) {
    // ...
  }
}