budibase/packages/builder/src/App.svelte

<script>
  import Modal from "svelte-simple-modal"
  import { onMount } from "svelte"
  import { Router, basepath } from "@sveltech/routify"
  import { routes } from "@sveltech/routify/tmp/routes"
  import { store, initialise } from "builderStore"
  import AppNotification, {
    showAppNotification,
  } from "components/common/AppNotification.svelte"

  function showErrorBanner() {
    showAppNotification({
      status: "danger",
      message:
        "Whoops! Looks like we're having trouble. Please refresh the page.",
    })
  }

  onMount(async () => {
    const res = await fetch(`/api/client/id`)
    const json = await res.json()

    store.update(state => {
      state.clientId = json
      return state
    })

    window.addEventListener("error", showErrorBanner)
    window.addEventListener("unhandledrejection", showErrorBanner)
  })

  $basepath = "/_builder"
</script>

<AppNotification />

{#if $store.clientId}
  <Modal>
    <Router {routes} />
  </Modal>
{/if}