How to Locomotive Scroll and Nuxt

❤️ Every one loves smooth scrolling!

💤 But sometimes working with Javascript frameworks and DOM can be boring and love fades away.

📦 With this simple starter kit you can have fun with Locomotive Scroll and Nuxt without giving it a second though.

Table of content:

Plugin
Component
- Markup
- Directive
Implementation
Gotchas
Examples

You can try this starter kit by cloning this repo and running:

# install dependencies
$ npm install

# run dev enviroment
$ npm run dev

# generate static project
$ npm run generate

Plugin

First of all we setup the plugin enabling Locomotive Scroll instance works globally both in our component and for your own purposes.

In /LocomotiveScroll/plugin/index.js we create the plugin:

import LocomotiveScroll from 'locomotive-scroll'
import 'locomotive-scroll/dist/locomotive-scroll.css'

const install = (Vue) => {
  Vue.prototype.LocomotiveScroll = LocomotiveScroll
}

export default install

if (typeof window !== 'undefined' && window.Vue) {
  window.Vue.use(install)
  if (install.installed) {
    install.installed = false
  }
}

After the setup, it will be used in /plugins/client.js.

/plugins/client.js works with mode: 'client' in the Nuxt plugins configuration .

Component

This component is an useful wrap for our Locomotive Scroll implementation.

Below are the main steps of the implementation.

Complete code can be found here /LocomotiveScroll/component/index.js.

Markup

<div
  v-locomotive="{ options }"
  class="js-locomotive"
>
  <slot />
</div>

The v-locomotive directive gets access to low-level DOM.

It takes one argument options.

options is a computed obtained merging the defaultOption data property with the gettedOptions prop.

defaultOption and gettedOptionscontain the Locomotive Scroll instance options.

computed: {
  options () {
    // this.defaultOptions = { smooth: true }
    // this.gettedOptions = { offset: ['30%',0], direction: 'horizontal' }
    return { ...this.defaultOptions, ...this.gettedOptions }
  }
}

Through the slot element we're able to pass content to the component from each page.

Directive

directives: {
  locomotive: {
    inserted (el, binding, vnode) {
      vnode.context.locomotive = new vnode.context.LocomotiveScroll({ el, ...binding.value.options })
      vnode.context.locomotive.on('scroll', (e) => {
        vnode.context.onScroll(e)
        vnode.context.$emit('scroll')
      })
      vnode.context.$emit('init')
    },
    unbind (el, binding, vnode) {
      vnode.context.locomotive.destroy()
      vnode.context.locomotive = undefined
    }
  }
}

In the inserted hook we create the new instance of Locomotive Scroll from the plugin previously created and we assign it to locomotive data property. The inserted hook guarantees the parent presence.

Once initialized we listen to scroll event.

Each time scroll event is fired we call onScroll method.

onScroll takes as parameter the scroll instance and uses this data to fill the store (/store/app.js) making the state of the scroll accessible and usable in all our application.

methods: {
  onScroll (e) {
    if (typeof this.$store._mutations['app/setScroll'] !== 'undefined') {
      this.$store.commit('app/setScroll', {
        isScrolling: this.locomotive.scroll.isScrolling,
        limit: { ...e.limit },
        ...e.scroll // x, y
      })
    }
  }
}

Implementation

Before using our component in the page we declare it globally in /plugins/both.js. /plugins/both.js is called in the Nuxt plugins configuration.

Once the plugin is global we can use it in our page or components in this way (/pages/index.vue):

<template>
  <LocomotiveScroll 
    ref="scroller" 
    :getted-options="{
      offset: ['30%',0],
      direction: 'horizontal'
      // Other options
    }">
  
    <!-- My Content:
    Html elements, Components...
    -->
    
  </LocomotiveScroll>
</template>

You can access to locomotive scroll instance using this.$refs.scroller.locomotive.

Gotchas

Reactive elements alter the state of the application and DOM's elements could change.

This changes can take place in nested components and updating Locomotive Scroll could be complex.

We can use the $nuxt helper and emit a global event

this.$nuxt.$emit('update-locomotive')

and listen it in the mounted hook in /LocomotiveScroll/component/index.vue component:

mounted () {
  this.$nuxt.$on('update-locomotive', () => {
    this?.locomotive?.update() // ?. is the Optional Chaining operator (https://www.joshwcomeau.com/operator-lookup?match=optional-chaining)
  })
}

💊 Alternatively, you may use this (smart) solution locomotivemtl/locomotive-scroll#408 provided by MikeHantha

Examples

Thanks

If you find this repo useful and you saved time, well... let's take a coffee together!

☕ https://www.buymeacoffee.com/davide_marchet

DidoMarchet/starter-kit-nuxt-locomotive-scroll

How to Locomotive Scroll and Nuxt

Table of content:

Plugin

Component

Markup

Directive

Implementation

Gotchas

Examples

Basic Scroll

Horizontal Scroll

Gsap Scroll Trigger

Image Loads

On Call Function

Thanks