Stimulus-use NPM

A collection of composable behaviors for your Stimulus Controllers

types included license

New lifecycle behaviors: adds new standard behaviors to your Stimulus controllers.
Composable: compose at will different behaviors in a single controller with mixins.
Modular: built as ES6 modules, just import what you need and tree shaking will remove the rest.
Typescript: Types available, better autocompletion.
Tiny: 3k gzip + tree shaking 🌳🌳🌳

Getting Started

Stimulus 3

If you want to use stimulus-use with Stimulus 3 you can use the version 0.50.0+. This and all future versions are designed to work with the @hotwired/stimulus npm package.

Note: If other packages still depend on the stimulus npm package you can safely keep that in your package.json, this won't break the stimulus-use compability.

Using npm

npm i stimulus-use @hotwired/stimulus

Using yarn

yarn add stimulus-use @hotwired/stimulus

Stimulus 2 and below

If you want to use stimulus-use with Stimulus 2 (or below) you can use version 0.41.0. This version is designed to work with the stimulus npm package.

Using npm

npm i stimulus-use@0.41.0 stimulus@2.0.0

Using yarn

yarn add stimulus-use@0.41.0 stimulus@2.0.0

Documentation

We got you covered 👉 stimulus-use.github.io/stimulus-use

Mixins

Observers

This set of mixins is built around the Observer APIs and custom events to enhance your controllers with new behaviors.

Mixin	Description	NEW Callbacks
`useClickOutside`	Tracks the clicks outside of the element and adds a new lifecycle callback clickOutside.	`clickOutside`
`useHotkeys`	Registers hotkeys using the hotkeys-js library and binds them to handler methods
`useHover`	Tracks the user's mouse movements over an element and adds mouseEnter and mouseLeave callbacks to your controller.	`mouseEnter` `mouseLeave`
`useIdle`	Tracks if the user is idle on your page and adds away and back callbacks to your controller.	`away` `back`
`useIntersection`	Tracks the element's intersection and adds appear, disappear callbacks to your controller.	`appear` `disappear`
`useMatchMedia`	Tracks if the window matches a media query string.	`is[Name]`, `not[Name]` and `[name]Changed`
`useMutation`	Tracks mutations on an element, its attributes and/or subtree. Adds a mutate callback to your controller.	`mutate`
`useResize`	Tracks the element's size and adds a new lifecycle callback resize.	`resize`
`useTargetMutation`	Tracks when targets are added or removed from the controller's scope, or their contents changed. Adds targetTargetAdded , targetTargetRemoved and targetTargetChanged callback to your controller for each specified target.	`[target]TargetAdded` `[target]TargetRemoved` `[target]TargetChanged`
`useVisibility`	Tracks the page visibility and adds visible, invisible callbacks to your controller.	`visible` `invisible`
`useWindowFocus`	Tracks the window focus and adds focus, unfocus callbacks to your controller.	`focus` `unfocus`
`useWindowResize`	Tracks the size of the `window` object and adds a new lifecycle callback windowResize.	`windowResize`

Optimization

A set of mixin to optimize performances.

Mixin	Description
`useDebounce`	Adds the ability to specify an array "debounces" of functions to debounce.
`useMemo`	Memoize expensive getters by mixing in `useMemo` and adding a static `memos` array.
`useThrottle`	Adds the ability to specify an array "throttles" of functions to throttle.

Animation

A set of mixin and controllers to build animations.

Mixin	Description
`useTransition`	Mixin or controller to apply classes to various stages of an element's transition.

Application

Mixin	Description
`useApplication, ApplicationController`	supercharged controller for your application.
`useDispatch`	Adds a dispatch helper function to emit custom events. Useful to communicate between different controllers.
`useMeta`	Adds getters to easily access meta values.

Extend or compose

Stimulus-use can be used in two ways: composing with mixins or extending built-in controllers**

Composing with mixins

This is the prefered approach as it bring the most flexibility. Simply import a mixin and apply it in the connect or initialize to adds new behaviors to you controller. You can combine several mixins within the same controller.

import { Controller } from '@hotwired/stimulus'
import { useIntersection, useResize } from 'stimulus-use'

export default class extends Controller {
  connect() {
    useIntersection(this)
    useResize(this)
  }

  appear(entry) {
    // triggered when the element appears within the viewport
  }

  resize({ height, width }) {
    // trigered when the element is resized
  }
}

Extending built-in controllers

You can create your Stimulus controller from a pre-built Stimulus-use controller which offers the new behavior you're looking for. This method works perfectly when you only need a single behavior for your controller.

import { IntersectionController } from 'stimulus-use'

export default class extends IntersectionController {
  appear(entry) {
    // triggered when the element appears within the viewport
  }
}