handle missing handler

Author: laffra

ltk/widgets.py

@@ -901,6 +901,8 @@ def __init__(self, handler=None, style=None):
 
         @callback
         def _handle_content(event):
+            if not handler:
+                return
             # see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file
             file = event.target.files.item(0)
             reader = window.FileReader.new()

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pyscript-ltk"
-version = "0.2.12"
+version = "0.2.13"
 description = "A little toolkit for writing UIs in PyScript"
 readme = "README.md"
 authors = [{ name = "Chris Laffra", email = "[email protected]" }]