Call console.count()
two times with and see the result:
Press F12 on your keyboard to view the message in the console view.
The first call will write "default: 1", and the second will write "default: 2".
<!DOCTYPE html> <html> <body> <script> console.count(); console.count(); </script>/*from w w w . jav a 2 s. co m*/ <p>This is because both calls have the same label.</p> </body> </html>