RunKit + npm: js-levenshtein

const jsLevenshtein = require("js-levenshtein"); function closestCommand (userText, commands) { let minDistance = Infinity; return commands.reduce((closest, cmd) => { console.log(`closest: ${closest}, cmd: ${cmd}`); const cmdDistance = jsLevenshtein(userText, cmd); if (cmdDistance < minDistance) { minDistance = cmdDistance; return cmd; } return closest; }, ''); } const myCommands = ['quit', 'login', 'logout', 'restart', 'refresh']; const userCommand = 'restrat'; console.log(`closest command is '${closestCommand(userCommand, myCommands)}'`);