Transformer: A Comprehensive Data Transformation Library

Introduction

The Transformer library provides a comprehensive set of tools for transforming data between various formats, including base64 strings, Uint8Arrays, Blobs, and File objects. It also includes a FormDataTransformer class for converting between FormData objects and JavaScript objects.

It includes the following features:

• Convert a Uint8Array to a Blob
• Convert a File to a Blob
• Convert a base64 string to a Blob
• Transform data into a FormData object
• Revert a FormData object into a JavaScript object
• Convert a base64 string to a File
• Convert a File to a base64 string
• Convert a base64 string to a Uint8Array
• Convert a Uint8Array to a base64 string
• Convert a Blob to a base64 string or ArrayBuffer
• Convert a File to a base64 string
• Convert a base64 string to a File
• Convert a Uint8Array to a File

Installation

To install the library, run the following command:

npm install @easylibs/transformer

Usage

Blob Transformer

The BlobTransformer interface provides methods for converting Uint8Arrays, Files, and base64 strings to Blobs.

To convert a Uint8Array to a Blob, use the fromUint8Array() method:

const blobTransformer = new Transformer.BlobTransformer();
const blob = blobTransformer.fromUint8Array(uint8Array);

To convert a File to a Blob, use the fromFile() method:

const blobTransformer = new Transformer.BlobTransformer();
const blob = blobTransformer.fromFile(file);

To convert a base64 string to a Blob, use the fromBase64String() method:

const blobTransformer = new Transformer.BlobTransformer();
const blob = blobTransformer.fromBase64String(base64String);

FormData Transformer

The FormDataTransformer interface provides methods for transforming data into a FormData object and reverting a FormData object into a JavaScript object.

To transform data into a FormData object, use the transform() method:

const formDataTransformer = new Transformer.FormDataTransformer();
const formData = formDataTransformer.transform();

To revert a FormData object into a JavaScript object, use the reverse() method:

const formDataTransformer = new Transformer.FormDataTransformer();
const object = formDataTransformer.reverse();

The FormDataTransformer interface also provides an option() method that allows you to specify a transformation option. The

Base64Transformer

The Base64Transformer class provides methods for converting between base64 strings and other file formats.

toFile()

The toFile() method converts a base64 string into a File object.

const base64String = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";

const file = new Transformer.Base64Transformer().toFile(base64String);

fromFile()

The fromFile() method converts a File object into a base64 string.

const file = new File(["Hello, world!"], "hello.txt", { type: "text/plain" });

const base64String = await new Transformer.Base64Transformer().fromFile(file);

toUint8Array()

The toUint8Array() method converts a base64 string into a Uint8Array.

const base64String = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";

const uint8Array = new Transformer.Base64Transformer().toUint8Array(base64String);

fromUint8Array()

The fromUint8Array() method converts a Uint8Array into a base64 string.

const uint8Array = new Uint8Array