JS Imitation Apple iwatch appearance of the timer code sharing _javascript Tips

This example describes the JS+CSS3 implementation of the Apple iwatch timer effect. Share to everyone for your reference. Specifically as follows:
The JS+CSS3-like Apple iwatch timer effect is a code that implements something similar to the latest hot Apple iwatch timer, with a start and reset button that supports the count display.
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For everyone to share the JS+CSS3 implemented similar to the Apple iwatch timer effect code as follows

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