当触笔的光标离开元素的边界时发生。
Occurs when the stylus cursor enters the bounds of an element.
为此，将代码绑定到用户名字段的onblur事件，该事件将在用户光标离开字段时触发。
To do so, bind code to the username field's onblur event, which is triggered when the user's cursor leaves the field.
如果离开多屏幕设置几分钟，则会发现很难记住光标所在的位置及位于哪个屏幕中。
If you step away from your multi-screen setup for a few minutes, you may find it difficult to remember where you left the cursor and on which screen.
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