how to use the submilliseconds function from date-fns in javascript

To use subMilliseconds function from date-fns in JavaScript, you need to install the date-fns package first. You can do it with your preferred package manager, for example, npm:

index.tsx
npm install date-fns
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Then, you can import the subMilliseconds function and use it in your code:

import { subMilliseconds } from 'date-fns';

const currentDate = new Date();
const modifiedDate = subMilliseconds(currentDate, 100); // Subtracts 100 milliseconds
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You can also pass a negative value to add milliseconds:

const modifiedDate = subMilliseconds(currentDate, -100); // Adds 100 milliseconds
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The subMilliseconds function will return a new date object with the given number of milliseconds subtracted (or added) to the original date object.