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

To use the startOfDay function from the date-fns library in JavaScript, you need to install the library first. You can do this by running the following command in your terminal:

npm install date-fns
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Once you have installed the library, you can import the startOfDay function into your JavaScript code and use it to get the start of a given day for a given date.

Here's an example code snippet that shows how to use the startOfDay function:

// Import the startOfDay function from date-fns
import { startOfDay } from 'date-fns';

// Create a new Date object for a given date and time
const myDate = new Date('2022-01-01T14:30:00');

// Get the start of the day for myDate
const startOfDayDate = startOfDay(myDate);

// Log the start of the day
console.log(startOfDayDate); // Output: Sat Jan 01 2022 00:00:00 GMT-0500 (Eastern Standard Time)
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In this example, we imported the startOfDay function from the date-fns library and used it to get the start of the day for a given Date object (myDate). We then logged the result to the console, which shows the start of the day for the given date and time.