behavior-add-reviewers.js
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			/**
			* @provides javelin-behavior-differential-add-reviewers
			* @requires javelin-behavior
			* javelin-dom
			* javelin-tokenizer
			* javelin-typeahead
			* javelin-typeahead-preloaded-source
			*/

			JX.behavior('differential-add-reviewers', function(config) {

			var root = JX.$(config.tokenizer);
			var datasource = new JX.TypeaheadPreloadedSource(config.src);

			var typeahead = new JX.Typeahead(root);
			typeahead.setDatasource(datasource);

			var tokenizer = new JX.Tokenizer(root);
			tokenizer.setTypeahead(typeahead);
			tokenizer.start();

			JX.DOM.listen(
			JX.$(config.select),
			'change',
			null,
			function(e) {
			if (JX.$(config.select).value == 'add_reviewers') {
			JX.DOM.show(JX.$(config.row));
			tokenizer.refresh();
			} else {
			JX.DOM.hide(JX.$(config.row));
			}
			});
			});

phab/webroot/rsrc/js/application/differential/behavior-add-reviewers.js94d0adb1406dproduction