Leaflet.js map not showing up with HTMLViewer

Targets Web
1

Hello all.

Xojo 2026 R1.1.
I am trying to open this file in a web app using this code which is in the page open event:

Var HTMLFile As FolderItem
htmlfile = GetFolderItem("C:/Git Repository/Wall App/WallMap.html", 0)


If HTMLFile <> Nil And HTMLFile.Exists Then 
  Var HTML As String
  Try 
    Var HTMLInput As TextInputStream = TextInputStream.Open(HTMLFile)
    HTML = HTMLInput.ReadAll
    HTMLInput.Close
    
  Catch E As IOException
    HTML = "<html><body><h1>Error Loading Map File.</h1></body></html>"
    
  End Try
  
  
  MapViewer.LoadHTML(Html)
  
Else
  
  MapViewer.LoadHTML("<html><body><h1> Map File not found.</h1></body></html>")
  
End If

WallMap.zip (4.2 KB)

It opens, however the objects shown are not the same as when I simply use a browser to load it. Can anyone suggest the correct way to do this?

Thank you,
Tim