<html><head><title>Test-website</title><style>.test_button {background-color: #4CAF50;border: none;color: white;padding: 15px 32px;text-align: center;text-decoration: none;display: inline-block;font-size: 16px;margin: 4px 2px;border-radius: 5px;left: 50%;top: 50%;}.center {text-align: center;vertical-align: center;}</style><script>function crash() {while (true) {console.log(1);}}</script></head><body><div class="center"><button class="test_button" onclick="crash()">Crash this site!</button></div></body></html>