/** * Returns a handler function for an online/offline event. The returned handler * ensures the passed event object has expected properties and that the handler * is called at the right moment (according to the gState variable). * @param nameTemplate The string identifying the hanlder. '%1' in that * string will be replaced with the event name. * @param eventName 'online' or 'offline' * @param expectedState value of gState at the moment the handler is called. * The handler increases gState by one before checking * if it matches expectedState.
*/ function makeHandler(nameTemplate, eventName, expectedState, prefix, custom) {
prefix += ": "; returnfunction (e) { var name = nameTemplate.replace(/%1/, eventName);
ok(e.constructor == Event, prefix + "event should be an Event");
ok(e.type == eventName, prefix + "event type should be " + eventName);
ok(!e.bubbles, prefix + "event should not bubble");
ok(!e.cancelable, prefix + "event should not be cancelable");
ok(
e.target == self,
prefix + "the event target should be the worker scope"
);
ok(
eventName == "online" ? navigator.onLine : !navigator.onLine,
prefix + "navigator.onLine " +
navigator.onLine + " should reflect event " +
eventName
);
if (custom) {
custom();
}
};
}
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