What is setMilliseconds()in JavaScript?

The setMilliseconds function in JavaSript is a method of the Date class with the following syntax:

setMilliseconds(millisecondsValue)

Parameters

  • millisecondsValue: an integer value between 0 and 999

Return value

  • setMilliseconds returns the number of milliseconds from 1 1 January 1970 00:00:00 UTC to the updated time

The setMilliseconds function is called on a Date object which results in the millisecond value of the date being updated to the millisecondsValue.

Example

The following code demonstrates the usage of the setMilliseconds function:

let x = new Date('June 29, 2021 15:39:05:32');
console.log(x.getMilliseconds());
x.setMilliseconds(99);
console.log(x.getMilliseconds());

In the example above, the Date object x has the date June 29, 2021 15:39:05:32, where the millisecond’s value is 32. After calling the setMilliseconds function on x, the value becomes 99 and is passed to the setMilliseconds function.

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