How to format the current time through js?

This article mainly introduces js to format the current time into year-month-day hour:minute:second. It mainly uses the Date() object of js to format the current system time into year-month-day hour: Minutes: Seconds, friends who need it can refer to

Use the Date() object of js to format the current system time into year-month-day hour:minute:second. You can also define the format yourself. (I encountered this problem while working on a project. I originally wanted to use Baidu, but the results on the Internet were too messy, so I wrote one myself)

The code is as follows:

Effect demonstration:

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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