Javascript string to arraybuffer. This method should be preferred over Window.

Javascript string to arraybuffer 3倍になることを覚悟した上でデータをDataURIに変換する必要がありましたし、XHRを使ってサーバからデータを取得する場合も、一度全てメモリに Jul 17, 2013 · I want to download binary files using Javascript. decode (buf); ArrayBuffer に関する一般的な実践的な質問の 1 つは、String を ArrayBuffer に変換する方法とその逆です。ArrayBuffer は実際にはバイト配列であるため、この変換では、文字列内の文字をバイトとして表す方法について両端で合意する必要があります。 Apr 8, 2016 · The posted code is just a tiny subset of UTF-8, the part where it is compliant with ANSI; (basically the english characters + the most often used symbols) As soon as you want to cover a foreign language, or some more "fancy" symbols, the first implementation won't cover it anymore. responseType = "arraybuffer I guess that an array is not a native javascript type, unlike numbers or strings. Sep 13, 2024 · Below are the approaches to convert base64 string to ArrayBuffer in Javascript: 1. toString() method with radix set to 16 instead. ; Static Properties ArrayBuffer. byteLength —— ArrayBuffer 的长度。 Jun 2, 2019 · JavaScript 目前没有一个标准的方法可以将字符串转换为 ArrayBuffer。网络上流传的一些方法不能完美的处理 Unicode ，以下是一些方法可以安全在字符串与字节数组之间互相转换。 使用 Encoding API Jun 19, 2013 · 我有一个ArrayBuffer包含使用 UTF-8 编码的字符串，但我找不到将其转换ArrayBuffer为 JS的标准方法String（我理解它是使用 UTF-16 编码的）。 我在很多地方都看到过这段代码，但我看不到它如何与任何长度超过 1 个字节的 UTF-8 代码点一起工作。 ArrayBuffer and typed arrays are powerful tools in JavaScript, essential for performance-critical web applications that handle binary data. Mar 16, 2024 · 本文介绍了在 JavaScript 中转换字符串和 ArrayBuffers 的方法，包括编码、解码、写入和读取 localStorage，以及服务端转换。使用 TextEncoder、TextDecoder 和 localStorage，可以轻松地在客户端和服务端之间有效地传输和存储数据，满足数据存储和传输等场景的需求。 Nov 22, 2023 · JavaScript string与arraybuffer 互转，#JavaScriptstring与ArrayBuffer互转##引言在JavaScript中，字符串（string）和ArrayBuffer是两种不同的数据类型，但有时我们需要在它们之间进行相互转换。 Nov 5, 2014 · I have written a simple TCP server on node. length; i++) { byteArray[i] = string. fromCharCode(current), "") ); } Complexity with btoa arises when you need to encode arbitrary JS strings, which may occupy more than a single byte, such as "👍". fromCharCode(null,array);，并将其拆分成不会破坏堆栈的操作，但一次要比单个字符更快。 大型数组缓冲区的最佳解决方案是： Aug 6, 2011 · JavaScript文字列を ArrayBuffers に、またはその逆に効率的に変換するための一般的に認められている手法はありますか？具体的には、ArrayBufferの内容をlocalStorageに書き込み、それを読み返す I have an ArrayBuffer which contains a string encoded using UTF-8 and I can't find a standard way of converting such ArrayBuffer into a JS String (which I understand is encoded using UTF-16). const stringToArrayBuffer = (string) => { let byteArray = new Uint8Array(string. Stack Overflow. Nov 26, 2024 · A Base64 string represents binary data in an ASCII string format by translating it into a radix-64 representation. byteLength); Jan 31, 2025 · The ArrayBuffer referenced by this view. I received string from the URL like. Mar 13, 2025 · A TypedArray object describes an array-like view of an underlying binary data buffer. 物理メモリの領域（バッファ）を確保するためのクラス。 Jun 26, 2015 · The most direct path from a Unicode String to a Uint8Array in pure JavaScript. In this example,Buffer. fromCharCode. js. Fixed at construction time and thus read only. toStringTag] @@toStringTag プロパティの初期値は文字列 "ArrayBuffer" です。 Aug 18, 2016 · @geeks, well JS uses UCS-2, and an ArrayBuffer is just a collection of bytes without meaning (on their own). charCodeAt(i); callback(bufferView); var _arr = String. Blob consists of an optional string type (a MIME-type usually), plus blobParts – a sequence of other Blob objects, strings and BufferSource. It works fine with an object composed of numbers, strings, and nested objects composed of numbers and strings. This method should be preferred over Window. // Original Buffer let b = Buffer. Apr 4, 2024 · We used the new Blob() constructor to convert the ArrayBuffer to a Blob. Each element in the array corresponds to one byte in the ArrayBuffer. Method 2: Reversing the Process with TextDecoder. CoolAJ86. slice(b. I'm converting the ArrayBuffer to a string, then back to an ArrayBuffer using TextDecoder and TextEncoder, however the result is being altered in the process. This process involves several steps, which are detailed below. 创建一个高度可扩展的库，任何人都可以通过向对象 StringView. After converting the ArrayBuffer to a Base64 encoded string, the output is “SGVsbG8sIFc=”. Mar 6, 2018 · How can I convert an ArrayBuffer to a base64-encoded string? 262 Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range. The first SO result is this question from Jul 13, 2022 · 但是，视图离不开底层的 ArrayBuffer，因此，除第一种情况（已提供 ArrayBuffer）外，其他所有情况都会自动创建 ArrayBuffer。 如要访问底层的 ArrayBuffer，那么在 TypedArray 中有如下的属性： arr. There is no global property named TypedArray, nor is there a directly visible TypedArray constructor. In the chrome app, when I get the data, I convert that to string using below function, I get an exception "byte leng May 3, 2013 · I realize this is a very old question, but I wanted to add one more possible case/solution since I landed on this from a search: I wanted an async/await version of FileReader. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. EDIT : Nov 26, 2024 · You can also read a binary file as a Blob by setting the string "blob" to the responseType property. From a Base64 string; From a local file; Properties ArrayBuffer. ArrayBuffer 인스턴스의 경우 ArrayBuffer 생성자가 초기 Mar 13, 2025 · The ArrayBuffer() constructor creates ArrayBuffer objects. encodeInto() method takes a string to encode and a destination Uint8Array to put resulting UTF-8 encoded text into, and returns a dictionary object indicating the progress of the encoding. length); var bufferView = new Uint8Array(array); for (var i = 0; i < str. Aug 6, 2011 · Is there a commonly accepted technique for efficiently converting JavaScript strings to ArrayBuffers and vice-versa? Specifically, I'd like to be able to write the contents of an ArrayBuffer to localStorage and then read it back. ArrayBuffer is an object which is used to represent fixed-length binary data. Jan 28, 2025 · # JavaScript ArrayBuffer转string在JavaScript中，ArrayBuffer是一种用来表示原始二进制数据的对象。它提供了一种更有效的方式来处理二进制数据，例如在网络通信和文件处理中。然而，在某些情况下，需要将ArrayBuffer转换为字符串以便更方便地处理数据。 Aug 9, 2011 · I want to read a binary file in JavaScript that would be gotten through XMLHttpRequest and be able to manipulate that data. In the browser, there are additional higher-level objects, described in File API, in particular Blob. The ArrayBuffer length after decoding and re-encoding always comes out larger. js to send some data to a Chrome app. In the above example, we create an ArrayBuffer with 8 bytes and populate it with ASCII values representing the string “Hello, W”. Bun implements the Web-standard TextDecoder class for converting between binary data types and strings. Contribute to dy/arraybuffer-to-string development by creating an account on GitHub. Sep 3, 2024 · A Base64 string represents binary data in an ASCII string format by translating it into a radix-64 representation. Blog; Portfolio; Picks; Don't Panic! May 28, 2012 · Just create a Blob with your data, like var blob = new Blob([array1,array2,string,]) and turn it back into an ArrayBuffer (if needed) using a FileReader (see this). apply(null, new Uint8Array(arraybuffer)); the buffer is probably coming in a unit8array and not in a unit16array Jan 24, 2015 · I have a Javascript object which will consists of a non-cyclic object hierarchy with parameters and child objects. . This ensures that only one execution context can access the memory at a time. From your code I'm not sure wich one you get in your response string, utf-8-encoded bytes or the correct "chars". charCodeAt()はUTF-16でエンコードしますがatob()の戻り値はASCII文字 Convert a string to an array buffer with JavaScript - stringToBuffer. This method creates strings from a byte array. By understanding and using these features effectively, developers can significantly enhance the functionality and performance of their applications. Nov 17, 2019 · ArrayBuffer (UTF-8) → 文字列. Turn on/off in Editor settings. 3945. * * @param {string} hexString - hex representation of bytes * @return {ArrayBuffer} - The bytes in an ArrayBuffer. fromCharCode、なぜか1文字しか渡せないと思いこんでいたので、なんとなくびっくりした。 console. Specifically a typeless array buffer in pure modern JavaScript. * Convert a hex string to an ArrayBuffer. apply(null, new Uint16Array(buf)); } From my understanding of the fact that we are in UTF8, and JavaScript strings are in UTF16, you need to do this instead: function ab2str(buf) { return String. byteOffset, b. prototype 添加方法来扩展它. About; Byte array to Hex string conversion in javascript. To handle arbitrary JS strings (which are UTF-16), you must first Nov 20, 2023 · As such, converting data into binary data formats — namely Data URL & ArrayBuffer would require additional steps to first convert String to byte sequences in UTF-8 before encoding these byte sequences into Base64 Strings. log(buffer. byteLength); // Expected output: 8 6 days ago · Encode an ArrayBuffer as a base64 string. Converting an ArrayBuffer to a Base64 encoded string is a common requirement in web development. fromCharCode(null,array);慢得多. */ Nov 25, 2016 · Here I am calling a GetFile , getting response as ArrayBuffer{} object, In network Tab response is {"errors":["photoProof Image is not available in the system\ Jul 25, 2024 · The difference between ArrayBuffer and SharedArrayBuffer is that the former is always owned by a single execution context at a time. Getting an array buffer from existing data. constructor. Mar 5, 2025 · The Uint8Array. :) Instead of the array, it seems that a kind of identifier (a number that reminds me a bit of C pointer) is injected into the javascript method. length); for(var i=0; i < string. get ArrayBuffer[@@species] The constructor function that is used to create derived 배열이 생성될 때 설정되며, ArrayBuffer의 크기를 변경할 수 있는 경우에만 ArrayBuffer. apply(null, new Uint16Array(arraybuffer)); to this . 在JavaScript中，String和ArrayBuffer是两种不同的数据类型。String用于处理文本信息，而ArrayBuffer用于处理二进制数据。在某些情况下，我们需要在这两者之间进行转换，特别是在处理网络请求或二进制文件时。 May 22, 2023 · The Javascript arrayBuffer. Jan 11, 2022 · There is an NPM package called arraybuffer-to-string used to decode array buffers in actual strings. Very useful in importing RSA keys in Javascript. const buf = new ArrayBuffer ( 64 ); const decoder = new TextDecoder (); const str = decoder. Command to install: npm install arraybuffer-to-string Feb 21, 2017 · I want to convert "base64" string into bytes array through the javascript. The atob () function decodes a Base64-encoded string into a binary string. Difference between property and function in javascript. var buffer = new ArrayBuffer( res ReadableStream とその他の型の間で変換を行いたいとき、Blob や Response を利用することで簡単にできる場合があります。1. xhr. 它是一个字节数组，通常在其他语言中称为“byte array”。你不能直接操作 ArrayBuffer 中的内容；而是要通过类型化数组对象或 DataView 对象来操作，它们会将缓冲区中的数据表示为特定的格式，并通过这些格式来读写缓冲区的内容。 5 days ago · To decode a Base64 string back to an ArrayBuffer in JavaScript, you can utilize the built-in atob function to decode the Base64 string into a binary string, and then convert that binary string into an ArrayBuffer. length The ArrayBuffer constructor's length property whose value is 1. 인스턴스 객체를 만드는 생성자 함수입니다. combination to convert a string to a buffer. ("GET", url); xhr. There are no ArrayBuffers in the JSON format (only strings, numbers, booleans, null, objects and arrays) so if you want to save an ArrayBuffer in JSON then you'll have to represent it in one of those types (probably a string or an array of numbers). はじめにstring,hex,ArrayBufferを相互に変換したくなりました。(hexは本記事では16進数の文字列という意味で用いています。 May 16, 2024 · String と ArrayBuffer の相互変換 JavaScript. 0. This is particularly useful when dealing with data fetched from a network or when manipulating binary data directly. byteOffset. alloc(512); // Slice (copy) its segment of the underlying ArrayBuffer let ab = b. Feb 2, 2022 · Note: Look at the response in both cases, since the submitted string is same although in different form, their array buffer view is also same. Int8Array. 78. open('GET', file); // Using 'arraybuffer' as Jul 24, 2018 · function ab2str(buf) { return String. buffer. Dec 23, 2011 · No dependencies, fastest, Node. log(String. from() is used to convert the string to a buffer. Check this : What's the difference between BlobBuilder and the new Blob constructor? And this : MDN Blob API. The Uint8Array constructor can then be used to convert this binary string into an ArrayBuffer. Is there a function that I can call or a pre-written function already out there? I have only been able to find ArrayBuffer to string functions, but I want the hexdump of the array buffer instead. 3. 但是，如果数组缓冲区变得太大，则会失败。我找到的最好的解决方案是使用String. Implementation Details. On the following pages you will find common properties and ArrayBuffer 对象用来表示通用的原始二进制数据缓冲区。. 为此类字符串对象（从现在开始：stringViews）创建一组方法，这些对象严格在数字数组上工作. length; i++) { bufferView[i] = str. # Convert a Blob to an ArrayBuffer using the Response() constructor. I've been looking around thinking there would be some sort of official library or function, but all I found Convert ArrayBuffer to string. GitHub Gist: instantly share code, notes, and snippets. byteOffset + b. I've got a JavaScript ArrayBuffer that I would like to be converted into a hex string. resize() 메서드를 사용하여 변경할 수 있습니다. Using these examples I created this: /** * Convert string to array buffer. An ArrayBuffer in JavaScr 他の言語で見かけるような byte[] というような、バイト列が欲しい場合に、 JavaScript では ArrayBuffer を使うというわけです。 ArrayBuffer はバイト列的だ、といっても、 ArrayBuffer ではバイト列へのインデックスアクセスは許可されていません 。 Jan 17, 2020 · I'm looking to get a SHA256 hash in JavaScript, on Google Chrome 79. prototype[Symbol. TypedArrays are views that allow you to work with ArrayBuffer data in a specific format. atob() because it results in a byte array, which is easier to work with than a string containing raw bytes, unless your decoded binary data is actually intended to be ASCII text. Try it // Create an ArrayBuffer with a size in bytes const buffer = new ArrayBuffer(8); console. x and later. Often used to encode binary data in text-based formats like JSON or HTML, it needs to be converted back into its original binary format for further processing. Sep 14, 2024 · JavaScript中String与ArrayBuffer的转化. prototype. Using atob and Uint8Array. byteLength. Some of these objects may hold binary data loaded from files or received via XHRs (not defined yet if Blob, ArrayBuffer or something else). apply(null, arr); callback(_arr); JSFiddle Console. reduce((acc, current) => acc + String. text() method returns a Promise that resolves with a string containing the contents of the blob. If you pass an ArrayBuffer to a different execution context, it is transferred and the original ArrayBuffer becomes unusable. js, you can also use theArrayBuffer andUint8Array. Jun 3, 2024 · Syntax: new ArrayBuffer(length) Parameters: length: The size of the buffer in bytes. 概要Encoding API を使って文字列とバイト列の相互変換に取り組みました。バイト列は Uint8Array であらわされ、Fetch API は Uint8Array の送受信をサポートし… Jul 7, 2014 · String. apply(null, [97, 98, 99])); //=> "abc" つまりこれは ArrayBuffer とかを String に変換するときにとても簡単に書ける。 ArrayBuffer 是一种用于在 JavaScript 中存储二进制数据的对象，可以看做是一个固定大小的字节缓冲区。可以使用 ArrayBuffer 来存储任意类型的二进制数据，包括数字、图像、音频等等。 Mar 5, 2025 · The toHex() method of Uint8Array instances returns a hex-encoded string based on the data in this Uint8Array object. Dec 26, 2012 · Blobコンストラクタに文字列を渡すと自動的にUTF-8に変換されることを利用(この動作は仕様)。ブラウザ内function str2bytes(str, callback) { var fr … Mar 30, 2025 · Working with ArrayBuffer TypedArrays. Jul 11, 2022 · We can create a TypedArray directly, without mentioning ArrayBuffer. The length (in bytes) of this view. The package not only converts the buffer to ‘utf8’ string but also it converts the buffer to many forms like base64 encoded string, a hex-encoded string that we use in many contexts . buffer); return dv. Example 2: In this example we use both ‘string-to-arraybuffer’ and ‘arraybuffer-to-string’ to illustrates the transparency between them. They provide a structured way to interpret the raw binary data. UsingArrayBuffer (Browser and Node. The Int8Array represents an array of 8-bit signed integers. codePointAt(i); } return Aug 5, 2011 · Blob比String. fromBase64() static method creates a new Uint8Array object from a base64-encoded string. To convert an ArrayBuffer to a string in JavaScript, the TextDecoder API is a powerful tool that allows for decoding binary data into text. js): If you're working with browser environments or Node. まえがき. I have a REST service that returns the binary data and i want to know if its possible to show the binary file, whichever the file extension. byteLength is a property in JavaScript that return the length of an ArrayBuffer in a byte. The Blob. Conclusion. Nov 23, 2024 · Note: For better compatibility with localStorage, which typically uses UTF-16, consider the string content accordingly to avoid encoding issues. Use this code to convert an array buffer to a number. Instead, there are a number of different global properties, whose values are typed array constructors for specific element types, listed below. Aug 31, 2022 · 逆にUint8Arrayにデコードするならatob()でデコードした文字列をString. apply(null, new Uint8Array(buf)); } So using Uint8Array instead of Uint16Array. Dec 6, 2022 · ArrayBuffer 类型化数组，类型化数组是JavaScript操作二进制数据的一个接口； 最初为了满足JavaScript与显卡之间大量的、实时的数据交换，它们之间的数据通信必须是二进制的，而不能是传统的文本格式的背景下诞生的； 类型化数组是建立在ArrayBuffer对象的基础上的。 Feb 13, 2012 · I need an efficient (read native) way to convert an ArrayBuffer to a base64 string which needs to be used on a multipart post. Here are 2 possible approaches to work around “The Unicode Problem” using Aug 27, 2014 · The native Encoding API offers a straightforward way to convert between raw binary data and JavaScript strings. Aug 30, 2021 · 方法由于 ArrayBuffer 实际上是一个字节数组，因此这种转换要求两端就如何将 String 中的字符表示为字节达成一致。 您之前可能已经看过这个“协议”：它是字符串的字符编码（通常的“协议条款”是，例如，Unicode UTF-16 和 iso8859-1）。. JavaScriptの内部文字コードはUTF-16ですが、Ajaxの戻りなどでUTF-8のバイト列が手元にある場合に May 12, 2019 · ArrayBuffer与字符串的互相转换 ArrayBuffer转为字符串，或者字符串转为ArrayBuffer，有一个前提，即字符串的编码方法是确定的。假定字符串采用UTF-16编码（JavaScript的内部编码方式），可以自己编写转换函数。 PHP接收二进制流并生成文件 php 字符串转二进制 Dec 5, 2022 · 我有一个 ArrayBuffer 其中包含一个使用 UTF-8 编码的字符串，我找不到将这种 ArrayBuffer 转换为 JS String -which我知道是使用 UTF-16 编码的）。 Nov 13, 2021 · Given a base64 string, what is the safest and most efficient way to create an ArrayBuffer. Jun 14, 2012 · One common practical question about ArrayBuffer is how to convert a String to an ArrayBuffer and vice-versa. This is potentially more performant than the older encode() method — especially when the target buffer is a view into a Wasm heap. we use plain text string here to convert it from one form to other form. Aug 30, 2022 · JavaScript ArrayBuffer 接口. Buffers are Uint8Arrays, so you just need to slice (copy) its region of the backing ArrayBuffer. ArrayBuffer. 130 (64-bit). The resulting buffer is displayed as a hexadecimal representation. js 4. You can also use the Response() constructor to convert a Blob to an ArrayBuffer. charCodeAt()を使って一文字ずつバイトに変換していきます。String. インスタンスオブジェクトを作成したコンストラクター関数。ArrayBuffer インスタンスの場合、初期値は ArrayBuffer コンストラクターです。 ArrayBuffer. To convert an ArrayBuffer back to a string, you can use the TextDecoder: Jul 21, 2019 · 写微信小程序用udp与服务器通信时message只可以用string和arraybuffer类型，我用了arraybuffer类型，此时涉及到string与arraybuffer的相互转换故记录所用函数以免以后忘记 通过先将字符串编码并转换为byte[],再转换为对应的arraybuffer（解析同理，先将arraybuffer转换为byte[]，再进行解码） 编码及解码的过程较复杂 Sep 21, 2024 · 文章浏览阅读1. The Buffer class is a subclass of JavaScript's <Uint8Array> class and extends it with methods that <Blob[]> An array of string, <ArrayBuffer>, <TypedArray Dec 4, 2015 · It seems so simple, but I cannot find out how to convert an Array filled with integers to an ArrayBuffer and back again to an Array. length: Always 1 (the number of arguments the constructor accepts). return String. But a view cannot exist without an underlying ArrayBuffer, so gets created automatically in all these cases except the first one (when provided). An ArrayBuffer in JavaScr ArrayBuffer、DataView、TypedArrayはJSからバイナリデータを扱うための仕様です。 どういう操作があるのかを改めて確認してみました。 まずは簡単に各クラスの定義から整理。 ArrayBuffer. 3k次，点赞18次，收藏13次。在JavaScript开发中，字符串（String）和ArrayBuffer是两种非常基础且常用的数据类型。字符串用于表示文本数据，而ArrayBuffer则用于表示二进制数据。理解这两种数据类型及其操作方法对于编写高效、可维护的代码至关重要。 May 6, 2018 · I have an ArrayBuffer which is returned by reading memory using Frida. To access the underlying ArrayBuffer, there are following properties in TypedArray: buffer – references the ArrayBuffer. getUint16(0, true); Very good! Had to change the Uint16Array to Uint8Array and worked like a charm! You can cast the Uint8Array (or any other ArrayBufferView) to number [] - it's working fine in my case - Apr 28, 2023 · Learn how to write a program in javascript to convert a string to array buffer. ArrayBuffer 是一种用于在 JavaScript 中存储二进制数据的对象，可以看做是一个固定大小的字节缓冲区。可以使用 ArrayBuffer 来存储任意类型的二进制数据，包括数字、图像、音频等等。 Apr 28, 2023 · To convert the string, we will first create a unit8Array of the strings length size and then using the codePointAt method of string, get the Unicode of each character. May 11, 2017 · The ArrayBuffer constructor creates a new ArrayBuffer of the given length in bytes. const bytes = new Uint8Array(buffer); const dv = new DataView(bytes. ArrayBuffer and views are a part of ECMA standard, a part of JavaScript. To convert individual numbers into hex, use the Number. Since an ArrayBuffer is, in fact, a byte array, this conversion requires that both ends agree on how to represent the characters in the String as bytes. buffer —— 引用 ArrayBuffer。 arr. 而不是创建新的不可变 JavaScript 字符串 May 26, 2021 · 场景应用 微信小程序的蓝牙设备通讯 正常写法 let len = 5 // 定义ArrayBuffer长度 let buffer = new ArrayBuffer(len) let dataView = new DataView(buffer) // 创建视图 dataView. There are lots of examples where strings are converted to an ArrayBuffer like for example here. var string = 'Hello World!'; var array = new ArrayBuffer(str. js Apr 1, 2023 · 02 技术细节 - ArrayBuffer、 Int32Array 等. DataView. setUint8( Array Buffer -> String and String -> ArrayBuffer conversions in javascript - arrayBufferToString. readAsBinaryString() because I am a capricious person and the callback interface annoyed me: Jan 2, 2021 · blobはファイルを抽象化したインターフェイス。中身をArrayBufferとして非同期的に取り出せ、ファイルタイプ(mimetype)を指定することで、ファイルの形式を指定することができる。 コンストラクタ。配列で渡されたArrayBufferを結合する。 How do I convert the string 'AA5504B10000B5' to an ArrayBuffer? Skip to main content. 以前の JavaScript はバイナリデータの扱いがとても下手でした。 バイナリデータをブラウザ上に一旦保存し再利用するには、サイズが1. The offset (in bytes) of this view from the start of its ArrayBuffer. Feb 20, 2021 · 问题 近期有个项目需要通过小程序配置设备，协议通过蓝牙传输裸的数据流，牵涉到js端将ArrayBuffer组装成String。方法 由于 ArrayBuffer 实际上是一个字节数组，因此这种转换要求两端就如何将 String 中的字符表示为字节达成一致。 Oct 3, 2012 · function encodeBase64Bytes(bytes: Uint8Array): string { return btoa( bytes. Sep 25, 2024 · The TextEncoder. mzx jwi rpgrtmk ayip uolkcf ofzsc ehhq sqczhwo rewk fdgx szjdvg wizynewu uqamvipd rcxv ehmlkkdb