Using string.FromCharCode() to Read Byte Arrays In JavaScript

index.md

Using string.FromCharCode() to Read Byte Arrays In JavaScript

string.FromCharCode() can be useful to convert a byte array into a readable string.

console.log(String.fromCharCode(65, 66, 67));
// ABC

Here's what this would look like when encoding a string with TextEncoder, and then converting this string back to readable text using fromCharCode:

const encoded = new TextEncoder().encode('food') // creates a Uint8Array containing [102, 111, 111, 100]

console.log(
  // we first need to convert the Uint8Array to a regular array using Array.from()
  // then, we destructure this array into fromCharCode()
  String.fromCharCode(...Array.from(encoded))
)
// food