This is a login page for the users.
Under the condition that the input box is empty, the input box gets a dynamic effect when the focus is lost and the focus is lost.The color change of input box and text is directly achieved by selecting the status switch.
The difficulty is to click the text to achieve focus acquisition, and after losing focus, it should be classified as the original state. Pay attention to switching the hidden and display elements.
You can do it yourself first, and then download the comparison of source files.