The fading reverses direction as the cursor moves away from, and then returns to, an HTML element.

当光标从 HTML 元素移出然后又移回此元素时，淡入淡出会反转方向。

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The tooltip follows the cursor as it moves, even as it fades in and out, and the fading will reverse direction when the cursor moves away from the HTML element, or back over it.

这个工具提示会跟随鼠标的移动，即使在淡入和淡出期间，而且当光标从HTML元素移出然后又移回此元素时，淡入淡出会反转方向。

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