/vue-global-events

Register global events as a component

Primary LanguageJavaScriptMIT LicenseMIT

vue-global-events Build Status npm package coverage

Listen to events on the document anywhere

Installation

npm install vue-global-events

Demo

Idea

Thanks to Vue’s event modifiers, handling events is extremely easy however, you’re limited to DOM element events. We decided to change that, so now you can register global events (for example application shortcuts) just like you would listen to events on a component. No need to worry about unregistration either. You can toggle the events with a single v-if. Works with SSR too.

Usage

import GlobalEvents from 'vue-global-events'

// register globally
Vue.component(GlobalEvents)

// or locally
export default {
  components: { GlobalEvents },
  // rest of your component
}

After that you can register global events like this:

<GlobalEvents
  v-if="listenersConnected"
  @keyup.ctrl.tab="nextTab"
  @keyup.ctrl.shift.tab="previousTab"
  @keyup.space="pause"
  @contextmenu="openMenu"
/>

Props

filter

  • type: Function
  • default: () => true
arguments
  • event: Native Event Object
  • handler: method passed to GlobalEvents component
  • eventName: event name with key modifiers

filter should return false to prevent the execution of a handler:

<GlobalEvents
  :filter="(event, handler, eventName) => event.target.tagName !== 'INPUT'"
  @keyup.prevent.space.exact="nextTab"
/>

In the example above event would be the native keyup Event Object, handler would be the method nextTab and eventName would be the string keyup. eventName can contain key modifiers if used

Advice / Caveats

  • Always .prevent events with .ctrl and other modifiers as browsers may be using them as shortcuts.
  • Do not use shortcuts that are used by the system or that the browser does not allow you to .preventDefault(). The list includes Ctrl+Tab/Cmd+Tab, Ctrl+W/Cmd+W. You can find more information in this StackOverflow answer.
  • Prefer using actual characters to keyCodes whenever possible: @keydown.+ for detecting the plus sign. This is important because symbols and numbers on the digit row will provide different keyCodes depending on the layout used.
  • You can add custom keyCodes to Vue.config.keyCodes. This is especially useful for numbers on the digit row: add Vue.config.keyCodes.digit1 = 49 so you can write @keydown.digit1 because writing @keydown.1 will trigger when keyCode === 1.
  • About using keyup with modifiers like .ctrl or .shift: the keyup event is triggered when a key is released and that's also when the event.ctrlKey is checked, which if you just released, will be false. This is because ctrl, shift and alt are checked differently. If you want to trigger on the keyup event of a modifier, you need to use its keycode (check it here. For example, for the ctrl key, that would be: @keyup.17. You can also use the advice above this one to provide it a name like ctrlkey.

Development

Run tests in watch mode:

npm run dev

Demo

Just use poi

# if not yet installed
npm i -g poi

poi index.js

Authors:

Damian Dulisz @shentao

Eduardo San Martin Morote @posva

License

MIT