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A set of custom events which make it easier to detect changes on the page.
当前为 
        此脚本不应直接安装。它是供其他脚本使用的外部库,要使用该库请加入元指令 // @require https://update.greasyfork.icu/scripts/370623/615674/Bunpro%3A%20Helpful%20Events.js
      
(function() {
		// Add a custom event for when BP creates a new body
		var newBody = new Event('new-body');
		waitForKeyElements('body > header', function(e) {fireEvent(newBody);});
		// Add a custom event for when you get a new item in reviews
		var newReviewItem = new Event('new-review-item');
		waitForKeyElements('.level_lesson_info a', function(e) {fireEvent(newReviewItem);});
		// Add a custom event when you go to study or cram page
		var quizPage = new Event('quiz-page');
		waitForKeyElements('#show-grammar', function(e) {fireEvent(quizPage);});
		// Add a custom event when you go to study page
		var studyPage = new Event('study-page');
		waitForKeyElements('#study-page #show-grammar', function(e) {fireEvent(studyPage);});
		// Add a custom event when you go to cram page
		var cramPage = new Event('cram-page');
		waitForKeyElements('#cram-page #show-grammar', function(e) {fireEvent(cramPage);});
		// Fires the given event on the body element
		function fireEvent(event) {
				$('HTML')[0].dispatchEvent(event);
		}
})();