'mu-jsbtn': HTMLElement;// wtf y did I do this to myself
'mujs-a': HTMLElement;
'mujs-addtab': HTMLElement;
'mujs-body': HTMLElement;
'mujs-btn': HTMLElement;// wtf y did I do this to myself
'mujs-column': HTMLElement;
'mujs-elem': HTMLElement;
'mujs-header': HTMLElement;
'mujs-host': HTMLElement;
'mujs-main': HTMLElement;
'mujs-root': HTMLElement;
'mujs-row': HTMLElement;
'mujs-section': HTMLElement;
'mujs-tabs': HTMLElement;
'mujs-tab': HTMLElement;
'mujs-toolbar': HTMLElement;
'mujs-url': HTMLElement;
}
/**
* Appends an event listener for events whose type attribute value is type. The callback argument sets the callback that will be invoked when the event is dispatched.
*
* The options argument sets listener-specific options. For compatibility this can be a boolean, in which case the method behaves exactly as if the value was specified as options's capture.
*
* When set to true, options's capture prevents callback from being invoked when the event's eventPhase attribute value is BUBBLING_PHASE. When false (or not present), callback will not be invoked when event's eventPhase attribute value is CAPTURING_PHASE. Either way, callback will be invoked if event's eventPhase attribute value is AT_TARGET.
*
* When set to true, options's passive indicates that the callback will not cancel the event by invoking preventDefault(). This is used to enable performance optimizations described in § 2.8 Observing event listeners.
*
* When set to true, options's once indicates that the callback will only be invoked once after which the event listener will be removed.
*
* If an AbortSignal is passed for options's signal, then the event listener will be removed when signal is aborted.
*
* The event listener is appended to target's event listener list and is not appended if it has the same type, callback, and capture.
* Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
* @param url Specifies a MIME type for the document.