<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'"> <meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'"> <title>Hello World!</title> </head> <body> <h1>Hello World!</h1> <script src="./renderer.js"></script> </body> </html>