24 lines
646 B
Markdown
24 lines
646 B
Markdown
---
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title: addDaysToDate
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tags: date,intermediate
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---
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Calculates the date of `n` days from the given date, returning its string representation.
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- Use `new Date()` to create a date object from the first parameter.
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- Use `Date.prototype.getDate()` and `Date.prototype.setDate()` to add `n` days to the given date.
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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 addDaysToDate = (date, n) => {
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d = new Date(date);
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d.setDate(d.getDate() + 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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addDaysToDate('2020-10-15', 10); // '2020-10-25'
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addDaysToDate('2020-10-15', -10); // '2020-10-05'
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```
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