Atob javascript. html>tr That's why URL. Window btoa() 方法 Window 对象 定义和用法 btoa() 方法用于创建一个 base-64 编码的字符串。 该方法使用 'A-Z', 'a-z', '0-9', '+', '/' 和 '=' 字符来编码字符串。 Jun 14, 2024 · Base64. btoa() crée une chaîne ASCII codée en base 64 à partir d'un objet String dans lequel chaque caractère de la chaîne est traité comme un octet de données binaires. 例えば、ASCII値の0～31のような制御文字をエンコード、通信、デコードすることが可能です Sep 8, 2017 · I am aware the former example uses utf8 encoding which js does not, the problem is there is no encoding in . For example, you can encode, transmit, and decode control characters such as Nov 28, 2023 · Dalam menjaga keamanan kode JavaScript, penggunaan teknik 'eval(atob())' untuk mengenkripsi kode dengan Base64 dapat dianggap sebagai solusi sederhana. 浏览器 Mar 5, 2024 · Optimize your JavaScript code effortlessly with the atob() method! Decode base64-encoded data seamlessly using the JavaScript Window atob() method. Running btoa on the Uint8Array will first convert the buffer to a string using toString(). See examples, use cases, and limitations of Base64 encoding and decoding. 语法 window. If you want to support these browsers, you must implement the Base64 encoding and decoding algorithms yourself (that is, polyfilling it). The parameter passed onto the Window atob () in JavaScript must be a valid base64 string. btoa () メソッドを使用したエンコードが可能で、 通信上の問題が無ければデータを送り、通信後に window. atob( str ))); Instantly share code, notes, and snippets. const decoded = new Buffer(encoded , "base64"). May 28, 2024 · This method decodes a base-64 encoded string, which has been encoded by the btoa () method. How can I properly handle the incoming base64-encoded stream so that it’s decoded as utf-8? atob() Decodes a base-64 encoded string: blur() Removes focus from the current window: btoa() Encodes a string in base-64: clearInterval() Clears a timer set with setInterval() clearTimeout() Clears a timer set with setTimeout() close() Closes the current window: confirm() Displays a dialog box with a message and an OK and a Cancel button: focus() I upvoted this because it's closest to correct. Jest runs all tests inside a vm, which is an isolated sandbox environment. js. Aug 23, 2021 · Steps to Reproduce: Reference the atob() function in a JavaScript or TypeScript file. Use the atob function and pass it the Base64 string. original and eventually put back in place. I know that btoa() and atob() work as counterparts in javascript. Apr 8, 2023 · 1 min read. However, it is no longer supported or maintained. Nov 22, 2015 · I too was convinced that atob and btoa were named backwards, being A the original string and B the encoded string, it was an unfortunate conicidence Base64 shared the initial with the encoded string B. , a string in which each character in the string is treated as a byte of binary data). Your response is byte array from your server application. – WindowBase64. btoa(unescape(encodeURIComponent( str ))); return decodeURIComponent(escape(window. May 18, 2013 · 6. Usage: Sep 24, 2019 · La fonction WindowOrWorkerGlobalScope. To decode Base64 data, follow the steps below: Pass the data to be decoded to the atob function and store the result in a Nov 16, 2022 · Using the atob function is deprecated and I suggest you this little snippet to decode base64 encoded strings: const encoded = "SOME_BASE64_STRING". Jul 17, 2012 · atob and btoa are mozilla specific functions afterwards the support was extended to webkit browser like chrome,safari so it doesn't work in IE. Dec 25, 2023 · Conversely, the atob() method decodes a string of data which has been encoded using base-64 encoding. – Apr 23, 2016 · I have made a profanity filter in Javascript through regex however I do not wish to have the banned words to show up in my code, so I used the btoa to encode the regex; however when I decode it using Jun 4, 2024 · atob() 함수는 Base64 인코딩된 문자열 데이터를 디코딩합니다. 返回值 该方法返回一个解码的字符串。. W3Schools offers free online tutorials, references and exercises in all the major languages of the web. javascript-code-and-decode-from-base64-using-atob-and-btoa-functions. " ab2str() is returning data in some chinese language. length; A função WindowBase64. Note that atob must be used first, because btoa gives a longer string, but atob becomes shorter and can further be halved by make it into 16-bit strings, so any answer with btoa first is wrong! Update (2023. Syntax: window. 1 DER encoding of SubjectPublicKeyInfo structure, or SPKI for short, see RFC5280 sec 4. It returns the decoded string. Edit: Tried to compare the byte arrays of both c# and javascript but the problem is the btoa function uses an unnamed encoding, so I can't actually get the bytes to print the byte array for it 3 days ago · Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more. Jan 1, 2018 · [JavaScript] 文字列をBase64デコードする（. atobはBase64文字列をバイナリ文字列へ変換する; atobにBase64以外の文字を入力するとエラーを吐く。 Best JavaScript code snippets using atob. btoa() para codificar e transmitir dados que, se não codificados, podem causar problemas de comunicação. The atob() function takes a Base64-encoded string as an argument and returns the original binary string. Example 1: This examples encodes the string “This is GeeksForGeeks Jan 27, 2016 · You just need to add one extra line and it should work. Thus, trying to encode a multibyte character to Base64, the btoa function will throw exception It utilizes atob which is not part of Javascript but is a Web API. Nov 30, 2023 · JavaScript provides two built-in functions for encoding and decoding base64 strings: btoa() and atob(). Node supports it since v16 (which means that currently there are hosts running Node 14, e. JavaScript use 16 bits per sign (UTF-16), the string called DOMString. On the other hand, if you are trying to use btoa or atob in the back-end side, you definitely should use Buffer interface. internal. So you can replace the spaces by + and replace it back to space after all is done. The fetch() method is modern and versatile, so we’ll start with it. Per MDN documentation, these function names are switched. EcmaError: ReferenceError: "window" is not defined I know I can decode using java but can any one let me know how to do it using rhino? java JavaScript には、base64 文字列をエンコードおよびデコードするための 2 つの組み込み関数が用意されています。. You can use this method to encode data which may otherwise cause communication problems, transmit it, then use the Window. JS and Linux / Mac / Windows CLI (it's a one-liner). walll-es / JavaScript btoa, atob. Oct 28, 2014 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Old browsers (more exactly, lower than Chrome 4, Edge 12, Firefox 2, Internet Explorer 10, and Safari 3. The result data will further need to be stored and transferred over the media that is created to deal with the textual information. This results in the string "[object Uint8Array]". May 7, 2015 · I’m using the Javascript window. String. javascript. log(de) show the "amer" again!! I can't understand why! The atob() method is for decoding, I used it as an encoding function but it works, and then the btoa() function decodes the result of this mistake and returns "amer"! While I expect de must be a wrong and different thing. exp; return Aug 19, 2021 · btoa and atob are only deprecated for Node. Vous pouvez utiliser la méthode btoa() pour encoder et transmettre des données qui pourraient causer des problèmes de communication, puis les transmettre et utiliser la méthode atob () pour décoder les données . 08. The term Base64 originates from a specific MIME content transfer encoding. These are two global functions in JavaScript that can be used to encode and decode data in Base64 format. " Jun 3, 2024 · The atob() method of the WorkerGlobalScope interface decodes a string of data which has been encoded using Base64 encoding. See solutions, examples, and alternatives to avoid the unicode problem and improve performance. Supports separator, suitable for binary data and React Native, relatively high performance. May 2, 2020 · Using Javascript's atob to decode base64 doesn't properly decode utf-8 strings 1 Decoding base64 string with atob raises error, even though it doesn't have any non-ASCII characters Large collection of code snippets for HTML, CSS and JavaScript. The btoa() 関数は文字列を引数として受け取り、base64 でエンコードされた文字列を返します。. 要阅读本文，您需要： 理解 JavaScript 中的字符串。您可以查阅如何在 JavaScript 中使用字符串以了解更多信息。 This example uses the built-in FileReader readDataURL () to do the conversion to base64 encoding. Allowed characters are A - Z, a - z, 0 - 9, +, and /. atob() to decode the string, the result is this: at the end of â al término de ⢠después de UTF-8 characters are not displayed properly. The Base64 Decoder Encoder is generally used when there is a need to encode or decode binary information. 2, last published: 6 years ago. toString() Edit: For client-side usage without the browserify module I recommend you to use this package. If you can ignore old Internet Explorer and old mobile phones (like iPhone 3?) this should be a good solution. btoa () La méthode WindowOrWorkerGlobalScope. fromCodePoint(0x10000). Please note that you may have to do some additional work to decode a multibyte encoded string . Function is: tokenExpired(token: string) { const expiry = JSON. base-64 编码使用方法是 btoa () 。. Problem is I’m getting ASCII-encoded characters back (like ⢠instead of ™). length == 2 Jun 4, 2015 · Base64 is a binary-to-text encoding, a sequence of bytes is encoded as a sequence of ASCII characters. A base64 string is an encoded string that represents binary data in an ASCII string. Avoid common pitfalls with Unicode, silent failures, and API differences. The inverse transformation is achieved by using the function atob . Após transmití-los pode-se usar o método window. It’s not supported by old browsers (can be polyfilled), but very well supported among the modern ones. getDecoder() but not able to get proper value. 1. You can use the Window. e. Latin1 の文字列を手に入れるための手段のひとつとして、encodeURIComponentがある。 Jul 30, 2023 · why-are-atob-and-btoa-not-reversible. 1) for public keys. Instead, consider using your platform's native implementations of these methods, such as on: Node. 1) do not support btoa and atob functions. Learn how to use btoa() and atob() functions to convert strings to and from Base64 in JavaScript. Você pode usar o método window. This module implemented the atob() and btoa() methods from the HTML Standard. 本記事ではこれらのオブジェクトの概念を整理することでJavaScriptでのバイナリデータの扱いの見通しを良くしていきます。. net that matches the javascript encoding. i have tried BASE64Decoder and Base64. btoa (String) to encode (not encrypt) text and send it over to the server side via AJAX, I find that the client-server exchange has resulted in plus signs ('+'), in the encoded text, being replaced by spaces (' '). Mar 29, 2023 · JavaScript can also decode Base64 text. atob(token. atob を使用します。 Oct 3, 2012 · Couple of notes. There are some issues to take into account when using them. The W3Schools online code editor allows you to edit code and view the result in your browser wondow. And as explained above everything works perfectly if strings are en- and decoded. I've seen many people complaining about using atob and btoa in the replies. The following offers some JavaScript for encode & decode of the Kinesis data/Data attributes. g. atob should produce the original string. In JavaScript, you can use the atob() method to decode a Base64-encoded string back to its original form. js環境の場合は Jul 11, 2022 · This function is only provided for compatibility with legacy web platform APIs and should never be used in new code, because they use strings to represent binary data and predate the introduction of typed arrays in JavaScript. The reference to the function is marked as deprecated, even if only the unintended one of its two overloads is. Por exemplo, você pode codificar Jul 20, 2015 · The base64 encoding is done on the server because there is some processing involved by converting from HTML to PDF. atob (encodedStr) 参数说明： encodedStr: 必需，是一个通过 btoa () 方法编码的字符串。. To be honest, it looks more like an authentication key/tag, which usually aren't human readable anyways. In addition, I’ll show how to embed PDF into HTML page and create a link to download the PDF. 1 It is therefore not possible to directly encode text as Base64. javascript. For Feb 20, 2013 · URL. Take your base64 string (derived from a file or loaded with any other method, POST/GET, websockets etc), turn it to a binary with atob, and then parse this to getDocument on the PDFJS API likePDFJS. atob() メソッドでデータを再びデコードします。. atob() décode une chaîne de données qui a été codée en utilisant le codage en base 64. Created August 17, 2018 00:06 Aug 13, 2020 · At the time the btoa function was defined, JavaScript had no type for 8-bit byte streams, so the API was defined to take the ordinary 16-bit string type as input, with the restriction that each code unit was supposed to be confined to the range [U+0000, U+00FF]; when encoded into ISO-8859-1, such a string would reproduce the intended byte Jun 7, 2016 · I have Query parameter that was encoded by btoa javascript function. The problem with the window. 0. test('fuel') === true as fuel is a perfectly valid encoded base64 string that decodes to ~ç¥. createObjectURL(file) works. Once the script has been loaded, you're good to go: window. I will show you some practical examples how to decode Base64 to PDF using the atob function and get some information about it. atob 在 JavaScript 中，可以使用Base64对字符串进行编码和解码。 在本文中，您将了解现代 Web 浏览器中可用的btoa和atobJavaScript 函数。 先决条件. – Sep 13, 2016 · Here is my vanilla JavaScript solution that does not use atob and Buffer. But it does not work if is "binary" like content, in our case the content of a pdf Feb 19, 2020 · Here is an example that shows how you can use atob () to decode a Base64 encoding string: const encodedStr ='SmF2YVNjcmlwdCBpcyBmdW4hIQ=='// decode the stringconst str =atob(encodedStr)// print decoded string console. Enhance your web development experience and ensure data integrity with this powerful function. btoa() 方法来编码可能会在传输过程中出现问题的数据，并且在接收数据之后，使用 atob() 方法再将数据解码。例如：你可以编码、传输和解码控制字符，如 ASCII 值为 0 到 31 的。 Mar 20, 2024 · Window Object Methods: A method in JavaScript is a function connected to an object. mjbvz transferred this issue from microsoft/vscode on Aug 24, 2021. atob() para decodificar os dados novamente. mozilla. When trying JS window. Solution without atob. Jan 2, 2023 · The Window atob () in JavaScript stands for ASCII to binary. The string must consist of characters that can be represented in 8 bits, such as ASCII or UTF-8. Mar 20, 2012 · According to MDN docs, you might need to escape and then decodeURIComponent to handle unicode: return window. Unicode can handle code points up to 0x10fffff. Piling up on the confusion is the fact that I started using Linux only during the last decade, Linux provided the base64 program so I never had to know that btoa did the same. . Here are few of the examples. " And atob "The atob () function decodes a string of data which has been encoded using Base64 encoding. As for even vs odd, the exception does not occur when x is "AAA", so odd lengths are fine. Aug 17, 2019 · I would create a function that converts the URI to pure binary by removing the base64 headers, and then setting that as the audio source. js APIs, converting between base64-encoded strings and binary data should be performed Mar 22, 2014 · Here I got the error: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded. createObjectURL expects a Blob (which can be a File) as its argument. However, I converted mine to use the deprecation warning suggestion of Buffer. The point of btoa and atob is to encode / decode actual binary data for transport over a text channel. Only one overload is. I can reproduce it all the time by typing: x="A"; window. Internet Explorer 10-11 will also have a fixed version of atob so it can decode strings containing whitespaces (namely, \t, \n, \f, \r and ' ' ). Jun 3, 2024 · The atob() method of the Window interface decodes a string of data which has been encoded using Base64 encoding. indexOf(BASE64_MARKER) + BASE64_MARKER. atob() function to decode base64-encoded strings as utf-8 in JavaScript. If you prepend the window. log(str)// output: JavaScript is fun!! The atob () function works perfectly if the Base64 encoded input string only has 8-bit bytes. The 64-bit decoder provides an option to decode unlimited characters without any hurdle. js since version 16. Secondly, btoa and atob work with strings only. atob(x); in the console of my google chrome browser. You may conduct operations or compute values by calling methods on objects. js: atob(), btoa() The web: atob(), btoa() To browse code from previous versions, see Git history. function base64_decode (a) { return atob (a) Feb 3, 2022 · After much searching and head scratching as to why btoa/atob are available in node but NOT available in jest running in node, I finally figured it out. As @Guillaume Badi said in the comments, your Base64 string is not foo bar. Meskipun memberikan lapisan tambahan keamanan dengan menyembunyikan kode dari pandangan pengguna biasa, penting untuk diingat bahwa metode ini mungkin tidak memberikan tingkat keamanan yang optimal. atob and window. btoa(decodeURIComponent(escape(unescape(encodeURIComponent("東京"))))) in one of the comments is the calls are not balanced and not in the Dec 2, 2014 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jun 18, 2019 · @Quentin, it's a shortcode generated using JavaScript and then interpreted by PHP. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. 509 format (ASN. For server-side JavaScript (Node), you can use Buffers to decode. btoa(unescape(encodeURIComponent("‌ 東京"))))) Whether or not some intermediate result appears to be garbled is not relevant. Below you can find the code to convert a base64 string into a Uint8Array copied from the docs. Oct 29, 2008 · These functions will perform lightning fast in comparison to raw Base64 decoding using a custom JavaScript function as btoa and atob are executed outside the interpreter. So better use some other functions like :- Do you have a Base64 string and do not know how to convert it to PDF using JavaScript? Do not worry! I am here to help you. Instead, you are creating a FileReader reader that reads file as a data url, then you use that data url to create another Blob (with the same contents). atob() function to decode a base64-encoded string (specifically the base64-encoded content from the GitHub API). 概念の整理. Best explained by example: Aug 1, 2017 · Strip those first and then run it: > atob('5mAG8AbwAgAGIAYQByAAoA') // console input. I suspect you're looking for a function to tell if you're looking at an encoded or vanilla payload … but such a (non-AI based and fully deterministic) function does not exist, though i'd be delighted to be proven wrong. The btoa() function takes a string as an argument and returns a base64 encoded string. getDocument({data: base64PdfData}); Codetoffel answer does work just fine for me though. You can use the WorkerGlobalScope. Oct 17, 2023 · Learn how to use btoa() and atob() functions to encode and decode binary data as web-safe text. when url clicked, request function called inside java controller where i wanted to decode Query parameter (which is encoded from javascript btoa). . MethodName () NOTE: Depending on the attributes, a parameter could have any value, including a string, number, object, and more. Node. importKey() method for the import of keys, which supports various key formats, in particular the PKCS#8 format (ASN. The procedure to decode a Base64 representation back into the original is very similar. The basic syntax is: let promise = fetch( url, [ options]) url – the URL to access. To decode base64-encoded data in React Native, you can use the base-64 library Share Jun 30, 2016 · atob() and btoa() are outdated and should no longer be used. For example: // ES5+ const decodedStr = atob ( 'Zm9vYmFy' ); console. ')[1])). Feb 13, 2023 · 1. That means, that a method must be exist to store several bits over several cells away. When the term "Base64" is used on its own to refer to a specific algorithm, it typically refers to Jul 14, 2014 · sun. Look at your functions: both download and dataURItoBlob do expect a data URI for some reason; you however are passing a plain html markup string to download in your example. Dec 8, 2017 · The atob() function in JavaScript remove spaces from the input string because Base64 encoding does not support spaces. Jan 26, 2013 · decodeURIComponent(escape(window. edited Nov 16, 2022 at 21:19. Support is fairly good, browsers support it. org. let BASE64_MARKER = ';base64,'; let base64Index = dataURI. Use the The atob() method to decode a base-64 encoded string. Data URLs are structured data:[<mediatype>][;base64],<data>, so we split that url at the comma and return only the base64 encoded characters. Using your data, this should do the trick: function convertURIToBinary(dataURI) {. Because you didn't pass a base64-encoded string. log (decodedStr); // 'foobar'. A base-64 encoded string can be decoded with the Window atob () in JavaScript. atob (Showing top 7 results out of 315) atob ( npm) atob. The browser atob / btoa functions specifically need character code points in the range of 0-255. parse(window. If you are going for a cross-browser solution, atob for Node. Solution. May 30, 2024 · Using btoa() and atob() functions. options – optional parameters: method, headers etc. The btoa() method of the Window interface creates a Base64 -encoded ASCII string from a binary string (i. is there any other way to do so? Java Controller For characters with higher codepoint then 255 exist different encodings. Latest version: 2. まずバイナリデータを処理しようとしている環境がNode. Start using atob in your project by running `npm i atob`. There's a solution without using them in the MDN page about Base64. May 7, 2015 · Learn how to use window. AWS Lambda, which doesn't support it). May 21, 2018 · I don't know much about decoding and encoding, but I found this on my website (it was hacked and someone took over a page in my site). ASCII 값 0부터 31까지의 제어 문자처럼 통신에 사용하면 문제가 발생할 수 있는 데이터를 btoa()로 인코딩해 전송하고, 받는 쪽에서는 atob()로 디코딩하면 문제 없이 원래 데이터를 가져올 수 있습니다. Window 接口的 atob() 函数会对经过 Base64 编码的字符串进行解码。你可以使用 Window. split('. To get the text back to proper encoding in PHP, I've had to use string transform like so: Mar 11, 2016 · Here is the Typescript version of accepted answer above by @cuixiping, now using Buffer instead of atob() I saw deprecation warnings using atob() from TypeScript, although it isn't fully deprecated. you will get rid of this deprecation mark. Thanks. Latin1 is in this range, but doesn't use every character in this range. 👍 27. jsなのかブラウザ環境なのかが重要です。. const stringToDecode = 'Zm9vYmFy'; const decodedString = atob (stringToDecode); // 'foobar' Compatibility & older Node. Jul 18, 2020 · The Web Crypto API provides the SubtleCrypto. See Also: The atob() Method. By default JavaScript built-in functions btoa and atob do not support Unicode strings, because these functions treat all characters as 16-bit-encoded strings (that is, are accepted only characters from the extended ASCII table, up to 255 char code). "The btoa () method creates a Base64-encoded ASCII string from a binary string (i. Not a string. Oct 22, 2011 · @swateek Works for me: base64regex. Luckily, both btoa() and atob() are supported in all modern browsers and Node. I analysed the page but can't read this: &lt;script type="text/ Jun 26, 2018 · const de = btoa(en); Surprisedly, console. 01) I have accepted the answer! Encrypting to a base64 string makes perfect sense for shareability or when you want to create a bookmarklet (code run from web addressbar javascript:eval(atob('')), but keep in mind that it gives no security whatsoever. Dec 4, 2022 · エンコードされた文字をatobに渡す; atobから渡された文字に対して、「文字を Latin1 範囲内の文字に変換する」で行ったのと逆の処理を行う; 元の文字が手に入る; encodeURIComponent. atob() decodifica uma string de dados que foi codificada através da codificação base-64. Jan 3, 2019 · @karthick : atob function is giving th eerror: message: "Failed to execute 'atob' on 'Window': The string to be decoded contains characters outside of the Latin1 range. 文字列は、ASCII や UTF-8 などの 8 Nov 12, 2021 · atob、btoaを利用する時。令和の今ではたぶんそこ以外ほぼない。 知らんけど。 そもそも atob と btoa は何をするもの？ Base64文字列とバイナリ文字列を相互変換する. Note : étant donné que cette fonction traite chaque caractère comme un octet de données binaires, quel que soit abab is deprecated. btoa are ready to use. The original native function can be retrieved with atob. It specifies the string which has already been encoded by the btoa () method. 1 DER encoding of the PrivateKeyInfo structure, see RFC5208 sec 5) for private keys and the X. btoa() と atob() 。. Jul 5, 2022 · On frontend I am checking if my JWT is expired. If I directly pass the data without encoding, all the quotation marks create a big mess and haven't found a way to escape all kinds of quotes. const blob = new Blob([array]); const reader = new FileReader(); May 12, 2010 · It's using btoa() and atob() functions. vscode-triage-bot assigned mjbvz on Aug 23, 2021. Syntax. Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by transforming it into a radix-64 representation. js versions. Explore the versatility of atob() for efficient handling of encoded information in your projects. btoa() method to encode and transmit data which may otherwise cause communication problems, then transmit it and use the atob() method to decode the data again. Jun 3, 2024 · Window: btoa () method. const stringA = 'I am Enrico in Asci'; Usage. var blob=new Blob([bytes], {type: "application/pdf"});// change resultByte to bytes. Feb 25, 2020 · The atob function is part of the JavaScript window object and is not available in React Native. atob） 投稿日：2017年12月31日 更新日： 2018年1月1日 文字列をBase64デコードするには、 window. btoa and atob are actually part of the HTML5 standardization process and most browsers do support them in mostly the same way already. The btoa/atob methods are not automatically exposed on the global object inside of a VM. atob( String ) Parameter (String): This parameter is required. For code running using Node. var bytes = new Uint8Array(resultByte); // pass your byte response to this constructor. 😄 2. atob(window. Feb 26, 2019 · To encode data in Base64, JavaScript provides a function called btoa which is an acronym for “Binary to ASCII”. When I use window. < "æ`ðð" // console output; SO stripped some chars. It is conceptually always a two step procedure: convert string to bytes (using some character encoding) encode bytes as Base64. Window atob () 方法 Window 对象 定义和用法 atob () 方法用于解码使用 base-64 编码的字符串。. pn pe nj tr iu rg tk bi jy ve