I can bind multi-select

src/myfasthtml/examples/binding_select_multiple.py

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+import logging
+from dataclasses import dataclass
+from typing import Any
+
+from fasthtml import serve
+from fasthtml.components import *
+
+from myfasthtml.controls.helpers import mk
+from myfasthtml.core.bindings import Binding
+from myfasthtml.core.utils import debug_routes
+from myfasthtml.myfastapp import create_app
+
+logging.basicConfig(
+  level=logging.DEBUG,  # Set logging level to DEBUG
+  format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',  # Log format
+  datefmt='%Y-%m-%d %H:%M:%S',  # Timestamp format
+)
+
+app, rt = create_app(protect_routes=False)
+
+
+@dataclass
+class Data:
+  value: Any = "Hello World"
+
+
+data = Data()
+
+
+@rt("/")
+def get():
+  select_elt = Select(
+    Option("Option 1", value="option1"),
+    Option("Option 2", value="option2"),
+    Option("Option 3", value="option3"),
+    name="select_name",
+    multiple=True
+  )
+  label_elt = Label()
+  mk.manage_binding(select_elt, Binding(data), init_binding=False)
+  mk.manage_binding(label_elt, Binding(data))
+  return select_elt, label_elt
+
+
+if __name__ == "__main__":
+  debug_routes(app)
+  serve(port=5002)