Introduction to date object

Date object , stay js Use in Date Object to represent a time
Create a Date object , If you directly use the constructor to create a Date object , Will be encapsulated as the current code execution time

var d = new Date（）

Create an object at a specified time , You need to pass a time string as an argument in the constructor
The format of the date ： month / year / when : branch : second

var d = new Date（"12/03/2020 10:10:10"）;

Date（） Object method
1.getDate（） Get the date of the current object

2.getDay（） Gets the current date of the week , Will return a 0~6 Value ,0 It means Monday ,1 Tuesday , And so on …

3.getMonth（） Gets the month of the current time object , Will return a 0~11 Value ,0 Means January ,1 It means February , And so on …

4.getFullYear（） Gets the year of the current date object

5.getTime（） Gets the timestamp of the current date object , Time stamp , It refers to... From Greenwich mean time 1970 year 1 month 1 Japan ,0 when 0 branch 0 second , The number of milliseconds taken to the current date （1 second = 1000 millisecond ）, Because of the year , month , The time base of the day is not unified , So the computer in order to unify the time base , When saving the time at the bottom, the millisecond stamp is used

6.now（） Get the timestamp of the current code execution , It is often used to test the running time of code