This example demonstrates a compact implementation of Base64 encoding in JavaScript, showing how binary data can be converted into a six-bit character representation using the standard Base64 alphabet. The code defines a function, `encode`, that iterates over the input string’s character codes and constructs the output by bit-shifting values and selecting characters from a lookup string. It uses standard JavaScript string methods like `charCodeAt` and `charAt` alongside bitwise operators, with no external libraries or visualization components involved. The example serves as a clear, minimal demonstration of encoding logic rather than a data-driven graphic.