fetch-blob

import { Blob } from 'fetch-blob'; import { File } from 'fetch-blob/file.js'; import { blobFromSync, fileFromSync } from 'fetch-blob/from.js'; import { Readable } from 'stream'; import { writeFileSync, existsSync, unlinkSync } from 'fs'; import { join } from 'path'; const testFilePath = join(process.cwd(), 'temp-test-file.txt'); writeFileSync(testFilePath, 'This is a test file content.'); async function runQuickstart() { // Create a basic Blob from a string const textBlob = new Blob(['hello, world', ' and some more text'], { type: 'text/plain' }); console.log(`Text Blob size: ${textBlob.size} bytes`); console.log(`Text Blob content: ${await textBlob.text()}`); // Create a File from an existing file path, without reading into memory const fsFile = fileFromSync(testFilePath, 'text/plain'); console.log(`FS File name: ${fsFile.name}`); console.log(`FS File size: ${fsFile.size} bytes`); console.log(`FS File last modified: ${new Date(fsFile.lastModified).toISOString()}`); // Combine multiple Blob/File parts into a new Blob const combinedBlob = new Blob([textBlob, fsFile, new Uint8Array([1, 2, 3])]); console.log(`Combined Blob size: ${combinedBlob.size} bytes`); // Read the combined blob's stream as a Node.js Readable const nodeStream = Readable.from(combinedBlob.stream()); let streamContent = ''; for await (const chunk of nodeStream) { streamContent += chunk.toString(); } console.log(`Combined Blob stream content (partial): ${streamContent.substring(0, 50)}...`); // Clean up the temporary file if (existsSync(testFilePath)) { unlinkSync(testFilePath); } } runQuickstart().catch(console.error);