Rename js snippets

snippets/js/s/encode-string-to-base64.md

@@ -0,0 +1,21 @@
+---
+title: Encode string to Base64
+type: snippet
+language: javascript
+tags: [node,string]
+cover: laptop-journey
+dateModified: 2020-09-15T16:28:04+03:00
+---
+
+Creates a base-64 encoded ASCII string from a String object in which each character in the string is treated as a byte of binary data.
+
+- Create a `Buffer` for the given string with binary encoding.
+- Use `Buffer.prototype.toString()` to return the base-64 encoded string.
+
+```js
+const btoa = str => Buffer.from(str, 'binary').toString('base64');
+```
+
+```js
+btoa('foobar'); // 'Zm9vYmFy'
+```