SHA-1 and SHA-256 Hash Function in JavaScript using crypto.subtle.digest

sha.js

async function SHA1(text) {
  let data = new TextEncoder().encode(text.toString());
  let digest = await crypto.subtle.digest("SHA-1",data);
  return Array.from(new Uint8Array(digest)).map(val=>{return ('00' + val.toString(16)).slice(-2)}).join('');
}

async function SHA256(text) {
  let data = new TextEncoder().encode(text.toString());
  let digest = await crypto.subtle.digest("SHA-256",data);
  return Array.from(new Uint8Array(digest)).map(val=>{return ('00' + val.toString(16)).slice(-2)}).join('');
}

Thanks for sharing this solution! Really helped me understand the crypto.subtle.digest workflow.

I ended up iterating on your approach with some ES6+ optimizations - thought I'd share back in case it's useful for others:

/**
 * Generates a cryptographic hash of the input string using the specified algorithm.
 *
 * @async
 * @param {'SHA-1' | 'SHA-256' | 'SHA-384' | 'SHA-512'} algorithm - The algorithm to use for hashing
 * @param {string} input - The string to be hashed
 * @returns {Promise<string>} A promise that resolves to a hexadecimal string representing the hash
 */
const generateHash = async (algorithm, input) =>
  [
    ...new Uint8Array(
      await crypto.subtle.digest(
        algorithm,
        new TextEncoder().encode(input?.toString() ?? "")
      )
    ),
  ].reduce((hex, byte) => hex + byte.toString(16).padStart(2, "0"), "");