Update app.py

app.py

@@ -2,3 +2,45 @@ import streamlit as st
 
 x = st.slider('Select a value')
 st.write(x, 'squared is', x * x)
+
+# 添加一个按钮
+if st.button("全屏"):
+    # 使用 JavaScript 实现全屏功能
+    st.markdown(
+        """
+        <script>
+        function toggleFullScreen() {
+            if (!document.fullscreenElement &&    // alternative standard method
+                !document.mozFullScreenElement && !document.webkitFullscreenElement && !document.msFullscreenElement ) {
+                if (document.documentElement.requestFullscreen) {
+                    document.documentElement.requestFullscreen();
+                } else if (document.documentElement.msRequestFullscreen) {
+                    document.documentElement.msRequestFullscreen();
+                } else if (document.documentElement.mozRequestFullScreen) {
+                    document.documentElement.mozRequestFullScreen();
+                } else if (document.documentElement.webkitRequestFullscreen) {
+                    document.documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
+                }
+            } else {
+                if (document.exitFullscreen) {
+                    document.exitFullscreen();
+                } else if (document.msExitFullscreen) {
+                    document.msExitFullscreen();
+                } else if (document.mozCancelFullScreen) {
+                    document.mozCancelFullScreen();
+                } else if (document.webkitExitFullscreen) {
+                    document.webkitExitFullscreen();
+                }
+            }
+        }
+        toggleFullScreen();
+        </script>
+        """,
+        unsafe_allow_html=True
+    )
+def click():
+    print('hello world')
+    st.write("按钮被点击了！")
+    return 1
+# 创建一个按钮，并直接指定点击时调用的函数
+st.button("点击我", on_click=click_function)