@ramstack/alpinegear-hotkey

@ramstack/alpinegear-hotkey is a plugin for Alpine.js that provides the x-hotkey directive.

This directive allows you to easily handle keyboard shortcuts within your Alpine.js components or application.

Uses @ramstack/hotkey package under the hood.

Installation

Using CDN

To include the CDN version of this plugin, add the following <script> tag before the core alpine.js file:

<!-- alpine.js plugin -->
<script src="https://cdn.jsdelivr.net/npm/@ramstack/alpinegear-hotkey@1/alpinegear-hotkey.min.js" defer></script>

<!-- alpine.js -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/cdn.min.js" defer></script>

Using NPM

Alternatively, you can install the plugin via npm:

npm install --save @ramstack/alpinegear-hotkey

Then initialize it in your bundle:

import Alpine from "alpinejs";
import hotkey from "@ramstack/alpinegear-hotkey";

Alpine.plugin(hotkey);
Alpine.start();

Usage

Define a hotkey combination using the directive by specifying key modifiers (such as Ctrl, Alt, Shift) with a + sign (e.g., Ctrl+Alt+Shift+S).

Here's a simple example:

<div x-data x-hotkey.shift+f.window="console.log($event.hotkey)">
    Hello, World!
</div>

[!TIP] The hotkey is case-insensitive. Standard key names are used.

You can find a list of key names here Key values for keyboard events

Event Object

The x-hotkey directive provides access to the native JavaScript event object via the magic $event property.

<div x-data x-hotkey.shift+f.window="console.log($event)"></div>

Also, the x-hotkey automatically passes the event object as the first argument to the method handler:

<div x-data x-hotkey.shift+f.window="e => console.log(e)"></div>

<!--  OR  -->
<div x-data x-hotkey.shift+f.window="handle"></div>

<script>
    function handle(e) {
        console.log(e);
    }
</script>

Event Modifiers

To simplify common tasks like calling event.preventDefault() or event.stopPropagation(), the x-hotkey directive supports following event modifiers:

• .prevent - calls event.preventDefault() before calling the event handler.
• .stop - call event.stopPropagation(), stopping the event from propagating further.
• .passive - indicates that the handler will never call event.preventDefault(), which improves scrolling performance for touch and wheel events.
• .capture - calling the event handler in the capture phase instead of the bubbling phase.
• .once - ensures the event handler is called only once.

<!-- prevent the default behavior for the keyboard event -->
<div x-hotkey.ctrl+s.prevent="save($event)"></div>

<!-- the event's propagation will be stopped -->
<div x-hotkey.ctrl+s.stop="save($event)"></div>

<!-- modifiers can be chained -->
<div x-hotkey.ctrl+s.prevent.stop="save($event)"></div>

Global Event Listening

Use the window or document modifiers to listen for hotkeys globally, across the entire page:

<div x-hotkey.ctrl+s.window.prevent="save($event)"></div>

Defining Alternative Hotkeys

You can assign multiple hotkeys to a single action by separating them with a dot (.). For instance, in the example below, the same action is triggered by both Ctrl + Shift + S and Alt + U.

To determine which hotkey triggered the event, use the hotkey property from the event object. This property contains the string representation of the hotkey.

<div x-data x-hotkey.ctrl+shift+f.alt+u.window="console.log($event.hotkey)">
    Hello, World!
</div>

Specific Events Listening

To change the event that x-hotkey listens for, use a directive argument. By default, the event is keydown, but you can specify keyup, keypress, or others:

<div x-hotkey:keyup.alt+u="console.log('Search...')"></div>

Exclude Elements

If you want to prevent hotkey handling from being triggered by specific elements, add the data-hotkey-ignore attribute to those elements:

<div x-hotkey.shift+k="...">
    ...
    <!-- Ignoring hotkeys from the input element -->
    <input type="text" data-hotkey-ignore>
</div>

You can also exclude a group of elements by applying the attribute to their parent:

<div x-hotkey.shift+k="...">
    ...

    <!-- Ignoring hotkeys from all elements within the form -->
    <form data-hotkey-ignore>
    ...
    </form>
</div>

Source code

You can find the source code for this plugin on GitHub:

https://github.com/rameel/ramstack.alpinegear.js/tree/main/src/plugins/hotkey

Contributions

Bug reports and contributions are welcome.

License

This package is released as open source under the MIT License. See the LICENSE file for more details.