better-testing

behavior-tooltip.js
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			/**
			* @provides javelin-behavior-phabricator-tooltips
			* @requires javelin-behavior
			* javelin-behavior-device
			* javelin-stratcom
			* phabricator-tooltip
			* @javelin
			*/

			JX.behavior('phabricator-tooltips', function() {

			JX.Stratcom.listen(
			['mouseover', 'mouseout'],
			'has-tooltip',
			function (e) {
			if (e.getType() == 'mouseout') {
			JX.Tooltip.hide();
			return;
			}

			if (e.getIsTouchEvent()) {
			return;
			}

			var data = e.getNodeData('has-tooltip');

			JX.Tooltip.show(
			e.getNode('has-tooltip'),
			data.size \|\| 120,
			data.align \|\| 'N',
			data.tip);
			});

			function wipe() {
			JX.Tooltip.hide();
			}

			// Hide tips when any key is pressed. This prevents tips from ending up locked
			// on screen if you make a keypress which removes the underlying node (for
			// example, submitting an inline comment in Differential). See T4586.
			JX.Stratcom.listen('keydown', null, wipe);


			// Hide tips on mouseup. This removes tips on buttons in dialogs after the
			// buttons are clicked.
			JX.Stratcom.listen('mouseup', null, wipe);

			// When we leave the page, hide any visible tooltips. If we don't do this,
			// clicking a link with a tooltip and then hitting "back" will give you a
			// phantom tooltip.
			JX.Stratcom.listen('unload', null, wipe);

			});