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