Add reproduction for issue #15637: ESC clears multiselect contents

issues/gh-15637/app.py

@@ -0,0 +1,56 @@
+"""
+Reproduction for GitHub Issue #15637
+Title: pressing ESC clear the contents of multiselect
+URL: https://github.com/streamlit/streamlit/issues/15637
+
+Expected: Pressing ESC should not change multiselect selections
+Actual:   ESC clears all selected values from multiselect
+Reported version: 1.58.0
+"""
+import streamlit as st
+
+st.title("Issue #15637: ESC clears multiselect contents")
+st.info("🔗 [View original issue](https://github.com/streamlit/streamlit/issues/15637)")
+
+st.header("Issue Overview")
+st.success(
+    "**Expected:** Pressing ESC (to close the dropdown or a containing popover) "
+    "should leave the multiselect selections untouched."
+)
+st.error(
+    "**Actual (Bug):** Pressing ESC clears all selected values from the multiselect. "
+    "This happens both when the multiselect is focused directly and when ESC is used "
+    "to close a popover that contains a multiselect."
+)
+
+st.divider()
+
+st.header("Bug Demonstration")
+st.write(
+    """
+**Steps to reproduce:**
+1. Click on the first multiselect to open its dropdown.
+2. Press ESC twice — the selected options are cleared.
+3. Open the popover below to see the second multiselect.
+4. Press ESC to close the popover — its selected options are cleared too.
+"""
+)
+
+msg = "What are your favorite colors?"
+colors = ["Green", "Yellow", "Red", "Blue"]
+
+options = st.multiselect(msg, colors, default=colors, key="1")
+st.write("You selected:", options)
+
+with st.popover("Popover"):
+    options = st.multiselect(msg, colors, default=colors, key="2")
+    st.write("You selected:", options)
+
+st.divider()
+
+st.header("Environment")
+st.code(f"Streamlit version: {st.__version__}")
+st.caption(
+    "Reported on Streamlit 1.58.0, Python 3.14.5, Windows (multiple browsers). "
+    "Reporter notes this is a regression from a previous version."
+)