My page is blank or froze

A blank page

If the page pane says Run it to see the page, this tab has no page yet.

1. Press Run, or press ⌘↵ or Ctrl+Enter.
2. If the rail shows a shield, the page’s code uses fetch or another way to reach outside, so it waits for Run. See My code did not run as I typed.

If the page ran but is empty or wrong:

1. Read the console beside the page. Errors from the page’s code are printed there.
2. Fix the code. Where an error names a line, click it to go there.

A page that froze

Code that never pauses, such as a loop that never ends, freezes the page. The page runs in its own process, so the rest of JSpark keeps working. JSpark covers the page and says so:

1. Press Stop page. Hiding the page, or moving to another tab, does not stop it.
2. Fix the loop or the code that never pauses.
3. Run the Snippet again.

See Web pages for how a page runs.