110 lines
3.3 KiB
Markdown
110 lines
3.3 KiB
Markdown
Unibabel
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==========
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Base64, TypedArrays, and UTF-8 / Unicode conversions in Browser (and Node) JavaScript
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See <https://coolaj86.com/articles/base64-unicode-utf-8-javascript-and-you/>
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See also
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* [TextEncoder](https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder/encode) / [TextDecoder](https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder/decode)
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* [DateView](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView)
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* [text-encoding](https://github.com/inexorabletash/text-encoding)
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* [TextEncoderLite (based on Buffer)](https://github.com/coolaj86/TextEncoderLite/tree/litest)
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* [TextEncoderLite (based on text-encoding)](https://github.com/coolaj86/TextEncoderLite/tree/lite)
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* [Beatgammit's base64-js](https://github.com/beatgammit/base64-js)
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API
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===
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```javascript
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// TypedArray <--> UTF8
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var uint8Array = Unibabel.strToUtf8Arr(str);
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var str = Unibabel.utf8ArrToStr(uint8Array);
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// TypedArray <--> Base64
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var base64 = Unibabel.arrToBase64(uint8Array)
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var uint8Array = Unibabel.base64ToArr(base64)
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```
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**Normal APIs**
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* utf8ToBuffer(utf8str) => array
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* bufferToUtf8(array) => string
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* utf8ToBase64(utf8str) => base64
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* base64ToUtf8(base64) => string
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* bufferToBase64(array) => base64
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* base64ToBuffer(base64) => array
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**Hex APIs**
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`unibabel.hex.js`
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* hexToBuffer(hexstr) => array
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* bufferToHex(array) => hexstr
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**Helper APIs**
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* utf8ToBinaryString(utf8str) => binstr
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* binaryStringToUtf8(binstr) => utf8str
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* bufferToBinaryString(buffer) => binstr
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* binaryStringToBuffer(binstr) => array
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Examples
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========
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```javascript
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// Base64
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var myArray = Unibabel.base64ToArr("QmFzZSA2NCDigJQgTW96aWxsYSBEZXZlbG9wZXIgTmV0d29yaw=="); // "Base 64 \u2014 Mozilla Developer Network"
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var myBuffer = Unibabel.base64ToArr("QmFzZSA2NCDigJQgTW96aWxsYSBEZXZlbG9wZXIgTmV0d29yaw==").buffer; // "Base 64 \u2014 Mozilla Developer Network"
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console.log(myBuffer.byteLength);
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// Crazy Unicode
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var sMyInput = "I'm a ☢ ☃ that plays 𝄢 guitar and spea̧͈͖ks Ar̽̾̈́͒͑ ̶̧̨̱̹̭̯ͧ̾ͬC̷̙̲̝͖ͭ̏ͥͮ͟Oͮ͏̮̪̝͍M̲̖͊̒ͪͩͬ̚̚͜!";
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var aMyUTF8Input = Unibabel.strToUtf8Arr(sMyInput);
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var sMyBase64 = Unibabel.arrToBase64(aMyUTF8Input);
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alert(sMyBase64);
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var aMyUTF8Output = Unibabel.base64ToArr(sMyBase64);
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var sMyOutput = Unibabel.utf8ArrToStr(aMyUTF8Output);
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alert(sMyOutput);
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```
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License
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=======
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Mozilla has licensed this code in the Public Domain, which means that I am at liberty to re-license my copy
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under the Apache 2, which is something that, general speaking, your legal department will feel more comfortable with.
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See <https://developer.mozilla.org/en-US/docs/MDN/About#Copyrights_and_licenses>
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ChangeLog
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====
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v2.0.0
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------
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The new implementation is binary compatible with node.js, TextEncoder,
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and other more-common UTF-8 encodings.
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It is also based on DOM APIs which result in much less code and are still
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backwards compatible all the way back to IE6 (not on purpose, just that
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it happens to work).
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See <https://coolaj86.com/articles/base64-unicode-utf-8-javascript-and-you/>
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v1.0.0
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------
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This version was based on the work by good folks at the MDN, however,
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the UTF-8 conversion was not byte-compatible with other UTF-8 conversions
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(such as node.js and TextEncoder), so don't use it.
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See <https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding>
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