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24 lines
751 B
Markdown
24 lines
751 B
Markdown
# Easy Date Comparison With DayJS
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Let's say my application fetches dates from the server which come back in
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string form as `"YYYY-MM-DD"` and I'd like to know if those dates already
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passed. This can be done easily by wrapping dates in
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[DayJS](https://github.com/iamkun/dayjs) and using its comparison functions.
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```javascript
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import dayjs from 'dayjs';
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const today = dayjs(new Date());
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const pastDate = dayjs("2018-10-22");
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const futureDate = dayjs("2022-01-01");
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console.log(pastDate.isBefore(today));
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// => true
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console.log(futureDate.isBefore(today));
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// => false
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```
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The `dayjs()` function can be used to construct DayJS date objects from Date
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objects and strings. These can then be compared with functions like
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`isBefore()` and `isAfter()`.
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