simpleshop_theme/assets/js/app.js

// If you want to use Phoenix channels, run `mix help phx.gen.channel`
// to get started and then uncomment the line below.
// import "./user_socket.js"

// You can include dependencies in two ways.
//
// The simplest option is to put them in assets/vendor and
// import them using relative paths:
//
//     import "../vendor/some-package.js"
//
// Alternatively, you can `npm install some-package --prefix assets` and import
// them using a path starting with the package name:
//
//     import "some-package"
//
// If you have dependencies that try to import CSS, esbuild will generate a separate `app.css` file.
// To load it, simply add a second `<link>` to your `root.html.heex` file.

// Include phoenix_html to handle method=PUT/DELETE in forms and buttons.
import "phoenix_html"
// Establish Phoenix Socket and LiveView configuration.
import {Socket} from "phoenix"
import {LiveSocket} from "phoenix_live_view"
import {hooks as colocatedHooks} from "phoenix-colocated/simpleshop_theme"
import topbar from "../vendor/topbar"

// Hook to sync color picker and text input
const ColorSync = {
  mounted() {
    const picker = this.el.querySelector('input[type="color"]')
    const text = this.el.querySelector('input[type="text"]')

    if (picker && text) {
      picker.addEventListener('input', (e) => {
        text.value = e.target.value
      })

      text.addEventListener('input', (e) => {
        picker.value = e.target.value
      })
    }
  }
}

// Hook for PDP image lightbox
const Lightbox = {
  mounted() {
    const dialog = this.el
    const lightboxImage = dialog.querySelector('#lightbox-image')
    const lightboxCounter = dialog.querySelector('#lightbox-counter')

    // Get images from data attribute
    const getImages = () => {
      try {
        return JSON.parse(dialog.dataset.images || '[]')
      } catch {
        return []
      }
    }

    const getCurrentIndex = () => parseInt(dialog.dataset.currentIndex || '0', 10)
    const setCurrentIndex = (idx) => { dialog.dataset.currentIndex = idx.toString() }

    const updateImage = () => {
      const images = getImages()
      const idx = getCurrentIndex()
      if (images.length > 0 && lightboxImage) {
        lightboxImage.src = images[idx]
        if (lightboxCounter) {
          lightboxCounter.textContent = `${idx + 1} / ${images.length}`
        }
      }
    }

    const nextImage = () => {
      const images = getImages()
      const newIdx = (getCurrentIndex() + 1) % images.length
      setCurrentIndex(newIdx)
      updateImage()
    }

    const prevImage = () => {
      const images = getImages()
      const newIdx = (getCurrentIndex() - 1 + images.length) % images.length
      setCurrentIndex(newIdx)
      updateImage()
    }

    const openLightbox = () => {
      updateImage()
      dialog.showModal()
    }

    const closeLightbox = () => {
      dialog.close()
    }

    // Event listeners for custom events dispatched from LiveView.JS
    dialog.addEventListener('pdp:open-lightbox', openLightbox)
    dialog.addEventListener('pdp:close-lightbox', closeLightbox)
    dialog.addEventListener('pdp:next-image', nextImage)
    dialog.addEventListener('pdp:prev-image', prevImage)

    // Close on clicking backdrop
    dialog.addEventListener('click', (e) => {
      if (e.target === dialog) {
        closeLightbox()
      }
    })

    // Keyboard navigation
    dialog.addEventListener('keydown', (e) => {
      if (e.key === 'ArrowRight') {
        nextImage()
      } else if (e.key === 'ArrowLeft') {
        prevImage()
      } else if (e.key === 'Escape') {
        closeLightbox()
      }
    })

    // Store cleanup function
    this.cleanup = () => {
      dialog.removeEventListener('pdp:open-lightbox', openLightbox)
      dialog.removeEventListener('pdp:close-lightbox', closeLightbox)
      dialog.removeEventListener('pdp:next-image', nextImage)
      dialog.removeEventListener('pdp:prev-image', prevImage)
    }
  },

  destroyed() {
    if (this.cleanup) {
      this.cleanup()
    }
  }
}

const csrfToken = document.querySelector("meta[name='csrf-token']").getAttribute("content")
const liveSocket = new LiveSocket("/live", Socket, {
  longPollFallbackMs: 2500,
  params: {_csrf_token: csrfToken},
  hooks: {...colocatedHooks, ColorSync, Lightbox},
})

// Show progress bar on live navigation and form submits
topbar.config({barColors: {0: "#29d"}, shadowColor: "rgba(0, 0, 0, .3)"})
window.addEventListener("phx:page-loading-start", _info => topbar.show(300))
window.addEventListener("phx:page-loading-stop", _info => topbar.hide())

// Scroll preview frame to top when changing pages
window.addEventListener("phx:scroll-preview-top", (e) => {
  const previewFrame = document.querySelector('.preview-frame')
  if (previewFrame) {
    previewFrame.scrollTop = 0
  }
})

// connect if there are any LiveViews on the page
liveSocket.connect()

// expose liveSocket on window for web console debug logs and latency simulation:
// >> liveSocket.enableDebug()
// >> liveSocket.enableLatencySim(1000)  // enabled for duration of browser session
// >> liveSocket.disableLatencySim()
window.liveSocket = liveSocket

// The lines below enable quality of life phoenix_live_reload
// development features:
//
//     1. stream server logs to the browser console
//     2. click on elements to jump to their definitions in your code editor
//
if (process.env.NODE_ENV === "development") {
  window.addEventListener("phx:live_reload:attached", ({detail: reloader}) => {
    // Enable server log streaming to client.
    // Disable with reloader.disableServerLogs()
    reloader.enableServerLogs()

    // Open configured PLUG_EDITOR at file:line of the clicked element's HEEx component
    //
    //   * click with "c" key pressed to open at caller location
    //   * click with "d" key pressed to open at function component definition location
    let keyDown
    window.addEventListener("keydown", e => keyDown = e.key)
    window.addEventListener("keyup", e => keyDown = null)
    window.addEventListener("click", e => {
      if(keyDown === "c"){
        e.preventDefault()
        e.stopImmediatePropagation()
        reloader.openEditorAtCaller(e.target)
      } else if(keyDown === "d"){
        e.preventDefault()
        e.stopImmediatePropagation()
        reloader.openEditorAtDef(e.target)
      }
    }, true)

    window.liveReloader = reloader
  })
}