<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <style> html,body{ width: 100%; height: 100%; } * { padding: 0; margin: 0; } .chartContainer { position: absolute; top: 0; left: 0; width: 80%; height: 80%; } </style> </head> <body> <div class="chartContainer"></div> </body> </html>