atob

(function () { "use strict"; // Import the atob function for decoding Base64 strings. // This package emulates the browser's atob behavior in Node.js. var atob = require('atob'); // A simple Base64-encoded string representing "Hello, World!" var b64Ascii = "SGVsbG8sIFdvcmxkIQ=="; var binAscii = atob(b64Ascii); console.log("Decoded ASCII:", binAscii); // Expected: "Hello, World!" // A Base64-encoded string that might contain non-ASCII characters (e.g., "你好") // Note: This package, like browser atob, may not handle Unicode correctly. // The actual encoding here assumes UTF-8 encoded bytes were Base64-encoded. var b64UnicodeExample = "5L2g5aW9"; // This is Base64 for '你好' (UTF-8 bytes) var binUnicodeAttempt = atob(b64UnicodeExample); console.log("Decoded Unicode (may be incorrect):", binUnicodeAttempt); // For correct Unicode, one would typically use Node's Buffer: // console.log("Correct Unicode (via Buffer):", Buffer.from(b64UnicodeExample, 'base64').toString('utf8')); // Another common use case: decoding URLs that might contain Base64 parameters // Assuming a fragment like 'data:text/plain;base64,VGhpcyBpcyBhIHRlc3Q=' var urlEncodedB64 = "VGhpcyBpcyBhIHRlc3Q="; var decodedUrlContent = atob(urlEncodedB64); console.log("Decoded URL part:", decodedUrlContent); console.log("\nNote: atob is primarily for ASCII. For robust Unicode, use Buffer.from(b64, 'base64').toString('utf8')."); }());