![]() Now you have the necessary knowledge and code examples to integrate Base64 encoding seamlessly into your Node.js applications. like this: const imageBuffer om (yourString, 'base64') Then you should either save it on a disk and use some other tools like imagemagick to transform it: fs.writeFileSync ('your-image.png', imageBuffer) // in case you know it's PNG, ofc // transform somehow, probably. These methods offer flexibility and convenience depending on your specific requirements. First, you need to transform it into the buffer with bytes. In this article, we explored three methods to perform Base64 encoding in Node.js, including using the built-in `Buffer` class, the `btoa()` and `atob()` functions, and the `base64-js` package. All my code is in a independent javascript file using Nodejs and is not connected with any html files. The `om(data)` method converts the string `data` into a buffer, which is then passed to `fromByteArray()`.īase64 encoding is a crucial technique for converting binary data into a text representation, especially when working with protocols or systems that require text-based data. I currently have a blob of type 'image/jpeg' that I need to convert to a base64 string. In this example, we import the `base64-js` package and use the `fromByteArray()` function to perform Base64 encoding. Once installed, you can use it in your Node.js application as follows:Ĭonst encodedData = omByteArray(om(data)) One such package is `base64-js`, which provides a comprehensive set of Base64 encoding and decoding functions. If you need more control or additional functionalities, you can use third-party packages available on npm. The result is the same as in the previous example. In this code snippet, we create a `Buffer` instance from the string `data` and use the `toString()` method to encode it in Base64 format. Internally, Buffer represents binary data in the form of a sequence of bytes. ![]() Buffer is available as a global object, and you don't need to explicitly require this module in your application. The btoa() function does the opposite: it takes a binary string as an argument and returns the Base64-encoded string. The atob() function takes a Base64-encoded string as an argument and returns the original binary string. Mastering this technique in Node. These are two global functions in JavaScript that can be used to encode and decode data in Base64 format. To use them, you need to access them through the `Buffer` object. Luckily, Node.js provides a native Buffer module that can be used to perform Base64 encoding and decoding. Base64 encoding is a technique used to convert binary data to ASCII characters. However, these functions are not available in the global scope by default in Node.js. The `btoa()` function is used for Base64 encoding, while `atob()` is used for Base64 decoding. Node.js also provides the `btoa()` and `atob()` functions, similar to those found in browsers. Method 2: Using the built-in `btoa()` and `atob()` functions The resulting encoded data is stored in the `encodedData` variable and printed to the console. Then we call the `toString()` method on the buffer, passing `'base64'` as the encoding. In the above code, we first create a `Buffer` instance from the string `data`. Let's look at an example:Ĭonst encodedData = om(data).toString('base64') By passing `'base64'` as the encoding, we can easily perform Base64 encoding. It includes a method called `toString()`, which accepts an optional encoding parameter. Node.js provides the `Buffer` class, which can be used for handling binary data. If you prefer to use callbacks instead of promises, you can use the fs.readFile() method like this: const fs = require( 'fs') įs.readFile( 'image.png', ( err, data) => base64,` + om(response.data).toString( 'base64') Īgain, we're setting the responseType option to 'arraybuffer' and prefixing the Base64 data with the appropriate MIME type, resulting in a data URL that can be embedded directly in an tag.Method 1: Using the built-in Buffer class In this code, we're using the fs.promises.readFile() method, which returns a promise that resolves with the content of the file. ![]() ![]() Let base64Image = om(data, 'binary').toString( 'base64') To make it asynchronous, we can use the readFile method in a different way: const fs = require( 'fs').promises Ĭonst data = await fs.readFile( 'image.png') The above code works fine, but it's synchronous, which means it will block the Node.js event loop. Note: Our example assumes the image is in the same directory as your script, so be sure to adjust the path accordingly if it is not.
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