CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.
CONSOLE MESSAGE: ResizeObserver loop completed with undelivered notifications.

Harness Error (TIMEOUT), message = null

PASS ResizeObserver implemented
NOTRUN guard
PASS test0: simple observation
PASS test1: multiple observation on same element trigger only one
PASS test2: throw exception when observing non-element
PASS test3: disconnect stops all notifications
PASS test4: unobserve target stops notifications, unobserve non-observed does nothing
PASS test5: observe img
PASS test6: iframe notifications
PASS test7: callback.this
PASS test8: simple content-box observation
PASS test9: simple content-box observation but keep border-box size unchanged
PASS test10: simple border-box observation
PASS test11: simple observation with vertical writing mode
PASS test12: no observation is fired after the change of writing mode when box's specified size comes from logical size properties.
PASS test13: an observation is fired after the change of writing mode when box's specified size comes from physical size properties.
PASS test14: observe the same target but using a different box should override the previous one
PASS test15: an observation is fired with box dimensions 0 when element's display property is set to inline
PASS test16: observations do not fire for non-replaced inline elements
PASS test17: Box sizing snd Resize Observer notifications
FAIL test18: an observation is fired when device-pixel-content-box is being observed assert_unreached: Caught a throw, possible syntax error Reached unreachable code