What are JavaScript time functions and mathematical operation functions?

Today, I would like to share with you the relevant knowledge points of JavaScript time function and mathematical operation function, which are detailed and logical. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

1. Time function Date

1 、 Date

In JavaScript, you use the Date () function to get the time.

Var date = new Date ()

2. Create a specified time object

You need to pass a string representing the time in the constructor as a parameter, the format of the date month / day / year: minutes: seconds

Var date2 = new Date ("11 Compact 2 Universe 20 21 18:15:00")

3. GetDate ()

Gets the number of days the current date object is.

4. GetDay ()

Gets the day of the week of the current date object and returns a value of 0-6. 0 means Sunday and 1 means Monday. no, no, no.

5. GetMonth ()

Gets the month of the current time object, with 0 for January and 1 for February.

6. GetFullYear ()

Get year

7. GetTime ()

Gets the timestamp of the current date object.

Timestamp, which refers to the number of milliseconds spent from 00:00:00 GMT on January 1, 1970 to the current date (1 second = 1000 milliseconds), which is used by the underlying computer to save time.

8. Use timestamps to test the performance of code execution

Var start = Date.now ()

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