Update byteSize.md

2017-12-29 18:22:30 +05:30
parent 5b747b20d5
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 Returns the length of string.

+It converts a given string to a [Blob Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and finds it's size
+
 ```js
 const byteSize = str => new Blob([str]).size;
 ```