当
当 <menu> 元素以上下文菜单形式在 HTML 中显示时,触发 onshow 事件。
示例
您可以尝试运行以下代码,在 <menu> 元素以上下文菜单形式显示时执行脚本 −
<!Doctype html> <html> <head> <title>HTML menu</title> </head> <body> <div style = "border:1px solid #000; padding:20px;" contextmenu = "clickmenu"> <p>Right click inside here....</p> <menu type = "context" id = "clickmenu" onshow="display()"> <menuitem label = "Tutorialspoint" onclick = ""></menuitem> <menuitem label = "Tutorials Library" onclick = ""></menuitem> <menuitem label = "Coding Ground" onclick = ""></menuitem> <menuitem label = "Q/A" onclick = ""></menuitem> </menu> </div> <script> function display() { alert("The context menu will be visible now."); } </script> </body> </html>
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