Added isBetweenDates.md snippet

snippets/isBetweenDates.md

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+---
+title: isBetweenDates
+tags: date,beginner
+---
+
+Check if a date is between two other dates
+
+- Use the greater than operator (`>`) to check if the `date` comes after the `dateStart`.
+- Use the less than operator (`<`) to check if the `date` comes before the `dateEnd`.
+- Use the logical and operator (`&&`) to check if the `date` is between the `dateStart` and the `dateEnd`.
+
+```js
+const isBetweenDates = (dateStart, dateEnd, date) => date > dateStart && date < dateEnd;
+```
+
+```js
+isBetweenDates(new Date(2010, 11, 20), new Date(2010, 11, 30), new Date(2010, 11, 19)); // false
+isBetweenDates(new Date(2010, 11, 20), new Date(2010, 11, 30), new Date(2010, 11, 25)); // true
+isBetweenDates(new Date(2010, 11, 20), new Date(2010, 11, 30), new Date(2010, 11, 31)); // false
+```