How is snapchat implemented?

https://kit.snapchat.com/port.
log in
and then

clipboard.png

clipboard.png

just the action of this process is obviously self-designed
. How can this be realized?


provides an idea to add a click event to the + button to change the background color and width and height of the + button. The + button is wrapped in the login box information, but it is hidden through alpha, and then the click event will let the login box information display. Then the most important thing is to add the transition property of css to the + button. I'll write one to try

.

https://codepen.io/alexxxcs1/.

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