how to use the endofsecond function from the date-fns library in typescript

To use the endOfSecond function from the date-fns library in TypeScript, you first need to install the library and its types if you haven't already:

npm install date-fns
npm install @types/date-fns --save-dev
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After that, you can import the function and use it in your TypeScript code like this:

index.ts
import { endOfSecond } from 'date-fns';

const date = new Date();
const endOfSecondDate = endOfSecond(date);

console.log(endOfSecondDate); // Output: 2021-06-30T23:59:59.999Z
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As you can see, the endOfSecond function takes a Date object as a parameter and returns a new Date object with the last millisecond of the second. In this example, we create a new Date object for the current time, and then use the endOfSecond function to get the end of the current second.