21 lines
548 B
Markdown
21 lines
548 B
Markdown
---
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title: Encode string to Base64
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tags: node,string
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cover: laptop-journey
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firstSeen: 2018-01-17T21:43:21+02:00
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lastUpdated: 2020-09-15T16:28:04+03:00
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---
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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.
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- Create a `Buffer` for the given string with binary encoding.
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- Use `Buffer.prototype.toString()` to return the base-64 encoded string.
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```js
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const btoa = str => Buffer.from(str, 'binary').toString('base64');
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```
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```js
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btoa('foobar'); // 'Zm9vYmFy'
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```
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