<!DOCTYPE html> <html lang="ja"> <head> <title>皇居</title> <meta name="viewport" content="width=device-width, initial-scale=1" /> <link rel="stylesheet" href="../src/leaflet.css" /> <!-- (1) --> <script src="../src/leaflet.js"></script> <style type="text/css"> <!-- div#mymap {width: 90vw; height: 80vh; margin: 0 auto;} /* (2) */ --> </style> </head> <body> <h1>皇居</h1> <div id="mymap"></div> <!-- (3) --> <!-- #mymap であるdivを配置したあとで (4) --> <script type="text/javascript" src="domon.js" charset="utf-8"></script> </body> </html>