<MDL.Tooltip 
					element = {<i className="material-icons">add</i>}
					text = 'Follow'
					large = {true}
					style = {tooltipStyle}
/>
<MDL.Tooltip 
					element = 'Please move your mouse on it.'
					text = 'this is a bird.'
					url = 'https://dl.dropboxusercontent.com/u/107164257/CSS3Images/CSS3/bird.png'
					large = {true}
					width = {30}
					height = {30}
					style = {tooltipStyle}
				/>
@@ -1,29 +1,25 @@
 %3C
-MDL.
 Tooltip %0A%09%09%09%09%09element = 
@@ -135,12 +135,8 @@
 /%3E%0A%3C
-MDL.
 Tool

修改tooltip.js