Phoenix LiveView browser loading spinner / https://twitter.com/_developit/status/1625612424576376840?s=12&t=r2wsZ3n1jFq2d8DsnGMu-Q

code.js

// Courtesy of @chrismccord

let pageLoadingDone = new Promise(resolve => {
  window.addEventListener("phx:page-loading-stop", _info => {
    topbar.hide()
    resolve()
  }, {once: true})
})
window.addEventListener("phx:page-loading-start", _info => {
  if(navigation.navigate){
    navigation.addEventListener("navigate", e => e.intercept({handler: () => pageLoadingDone}), {once: true})
    navigation.navigate(location.href)
  }
  topbar.show(200)
})