<!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <script src="dbl.js"></script> <title>Document</title> </head> <body> <p id="a">ここをクリックしてね。</p> <p>2</p> <p>3</p> <p>4</p> <script type="text/javascript"> <!-- document.getElementById("").addEventListener("click", (ev) => { alert("見つかっちゃった"); }); // --> </script> </body> </html>