===================== no-useless-parameters ===================== Reject common XPCOM methods called with useless optional parameters (eg. ``Services.io.newURI(url, null, null)``, or non-existent parameters (eg. ``Services.obs.removeObserver(name, observer, false)``). This option can be autofixed (``--fix``). Examples of incorrect code for this rule: ----------------------------------------- .. code-block:: js elt.addEventListener('click', handler, false); Services.io.newURI('http://example.com', null, null); Services.obs.notifyObservers(obj, 'topic', null); Examples of correct code for this rule: --------------------------------------- .. code-block:: js elt.addEventListener('click', handler); Services.io.newURI('http://example.com'); Services.obs.notifyObservers(obj, 'topic');