24 lines
660 B
Markdown
24 lines
660 B
Markdown
---
|
|
title: daysAgo
|
|
tags: date,beginner
|
|
firstSeen: 2020-10-06T05:35:23+03:00
|
|
lastUpdated: 2020-10-20T11:21:07+03:00
|
|
---
|
|
|
|
Calculates the date of `n` days ago from today as a string representation.
|
|
|
|
- Use `new Date()` to get the current date, `Math.abs()` and `Date.prototype.getDate()` to update the date accordingly and set to the result using `Date.prototype.setDate()`.
|
|
- Use `Date.prototype.toISOString()` to return a string in `yyyy-mm-dd` format.
|
|
|
|
```js
|
|
const daysAgo = n => {
|
|
let d = new Date();
|
|
d.setDate(d.getDate() - Math.abs(n));
|
|
return d.toISOString().split('T')[0];
|
|
};
|
|
```
|
|
|
|
```js
|
|
daysAgo(20); // 2020-09-16 (if current date is 2020-10-06)
|
|
```
|