JavaScript | date.setMilliseconds() function

The date.setMilliseconds() is an inbuilt function in JavaScript which is used to set milliseconds into a date object which are created using date() constructor.
Syntax:

dateObj.setMilliseconds(milliseconds_Value);

DateObj is a valid Date object created using Date() constructor in which we want to set the millisecond. Value of millisecond is from 0 to 999.
Parameter: Here parameter is milliseconds_Value i.e, the value of millisecond which is used to set in date() constructor.
Return Values: It returns the new i.e updated millisecond which is set by setMilliseconds() function.

// Here a date has been assigned 
// while creating Date object 
var dateobj = new Date('October 13, 1996 05:35:32:77'); 
  
// new millisecond of 52 is being set in above Date 
// Object with the help of setMilliseconds() function 
dateobj.setMilliseconds(52); 
  
// new millisecond from above Date Object is 
// being extracted using getMilliseconds() 
var B = dateobj.getMilliseconds(); 
  
// Printing new millisecond 
console.log(B); 

Output:

> 52

Errors and Exceptions

Code #1: If in Date() constructor we do not give any millisecond, still setMilliseconds() function set new millisecond which is given as its parameter.

// Here millisecond has not been assigned 
// while creating Date object 
var dateobj = new Date('October 13, 1996'); 
  
// new millisecond of 51 is being set in above Date 
// Object with the help of setMilliseconds() function 
dateobj.setMilliseconds(51); 
  
// new millisecond from above Date Object is 
// being extracted using getMilliseconds() 
var B = dateobj.getMilliseconds(); 
  
// Printing new millisecond 
console.log(B); 

Output:

> 51

Code #2: If nothing as parameter is given in Date() constructor, still setMilliseconds() function set millisecond but month, year, date etc become current ones.

// Here nothing has been assigned 
// while creating Date object 
var dateobj = new Date(); 
  
// new millisecond of 42 is being set in above Date 
// Object with the help of setMilliseconds() function 
dateobj.setMilliseconds(42); 
  
// milliseconds from above Date Object is 
// being extracted using getMilliseconds() 
var B = dateobj.getMilliseconds(); 
  
// month from above Date Object is 
// being extracted using getMonth() 
var C = dateobj.getMonth(); 
  
// date from above Date Object is 
// being extracted using getDate() 
var D = dateobj.getDate(); 
  
// year from above Date Object is 
// being extracted using getFullYear() 
var E = dateobj.getFullYear(); 
  
// Printing new milliseconds 
console.log(B); 
  
// Printing current month 
console.log(C); 
  
// Printing current date 
console.log(D); 
  
// Printing current year 
console.log(E); 

Output:

> 42
> 4
> 1
> 2018

Here 42 is the new milliseconds, 4 is the current month i.e April, 1 is the current date and 2018 is the current year.

Code #3: If value of millisecond 1006 is given as the parameter of setMilliseconds() function, It will set 6 as the millisecond because millisecond range is form 0 to 999 and hence $1006-1000=6$ , here 1000 is substracted because 0 to 999 is 1000.

// Here date has been assigned 
// while creating Date object 
var dateobj = new Date('October 13, 1996 05:35:32:45'); 
  
// new millisecond of 1006 is being set in above Date 
// Object with the help of setMilliseconds() function 
dateobj.setMilliseconds(1006); 
  
// milliseconds from above Date Object is 
// being extracted using getMilliseconds() 
var B = dateobj.getMilliseconds(); 
  
// Second from above Date Object is 
// being extracted using getSeconds() 
var C = dateobj.getSeconds(); 
  
// Printing new Milliseconds 
console.log(B); 
  
// Printing second 
console.log(C); 

Output:

> 6
> 33

Here 6 is the new millisecond and second becomes 33 from 32 because millisecond range is form 0 to 999 i.e, total 1000 and we set new millisecond as 1006 which increase second by one to 33 from 32 and millisecond becomes 6.

JavaScript | date.setMilliseconds() function

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