add daysFromNow.md

snippets/daysFromNow.md

@@ -0,0 +1,20 @@
+---
+title: daysFromNow.md
+tags: date,beginner
+---
+
+Returns the date of `n` days from today as a string representation.
+
+- Use `new Date()` and `Date.prototype.getDate()` to get the current time stamp add the number of milliseconds and use it to create a new `Date` object.
+- Use `Date.prototype.toISOString()` to return a string in `yyyy-mm-dd` format.
+
+```js
+const daysFromNow = n =>{
+  let date = new Date(new Date().getTime() + n * 24 * 60 * 60 * 1000);
+  return date.toISOString().split('T')[0];
+}
+```
+
+```js
+daysFromNow('5'); // 2020-10-13
+```