Sets up variables and listeners

map-globals.js

    // Excerpt from https://github.com/Losant/google-map-advanced-markers/blob/main/custom-head-content.html

    // Initialize globals
    const markers = {};
    let devices = [];
    let map;
    let numSelected = 0;
    let AdvancedMarkerElement;
    let bounds;
    let selectedAttribute = $('#attribute-selector').val() || 'battery';

    // Rebuild markers when changing attribute
    $(document).on('change','#attribute-selector',() => {
      selectedAttribute = $('#attribute-selector').val();
      resetMarkers();
      setAllMarkers();
    });

    // ...other functions...

    initMap();

    DashboardBlock.on('change', updateMap);