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+### byteSize
+
+Returns the length of string.
+
+Convert a given string to a [`Blob` Object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and find its `size`.
+
+```js
+const byteSize = str => new Blob([str]).size;
+```
+
+```js
+byteSize("😀"); // 4
+byteSize("Hello World"); // 11
+```