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

To use the valueOf() function from the date-fns library in JavaScript, you first need to install the library using a package manager like npm or yarn.

npm install date-fns
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Once installed, you can import the valueOf() function from the date-fns module and use it to get the Unix timestamp of a given Date object.

index.tsx
import { valueOf } from 'date-fns';

const myDate = new Date('2022-01-01T00:00:00.000Z');
const timestamp = valueOf(myDate);

console.log(timestamp); // 1640995200000 (Unix timestamp in milliseconds)
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The valueOf() function takes a Date object as its argument and returns the Unix timestamp of that date in milliseconds. This is useful when you need to compare or manipulate dates using their numeric values.