Inline JavaScript
The following experiment uses a
Python Web Server that serves a web page very slowly over a period of ca. 10 seconds.
The experiment demonstrates that (inline) JavaScript is executed as soon as the
browser has fetched the closing
</script> tag.
#
# https://gist.github.com/kainam00/39c8d5876027e38f112d6f07c785bb56
#
#!/usr/bin/env python
from http.server import HTTPServer
from http.server import BaseHTTPRequestHandler
import time
class DelayedHTTPResponse(BaseHTTPRequestHandler):
def do_GET(s):
print("GETting " + s.path)
s.send_response(200)
s.send_header("Content-type", "text/html")
s.end_headers()
s.wfile.write(b"""<!DOCTYPE html>
<html>
<head>
<title>Javascript test</title>
</head>
<body>
<script>
alert('hello world');
</script>
""");
s.wfile.flush()
for i in range(1, 10):
time.sleep(1)
s.wfile.write(bytes(str(i), 'latin1') + b" second(s) later.<br>")
s.wfile.flush();
s.wfile.write(b"</body></html>");
server_address = ('', 8080) # 8080 is the port on which the server listens
httpd = HTTPServer(server_address, DelayedHTTPResponse)
try:
httpd.serve_forever()
except KeyboardInterrupt:
pass
httpd.server_close()