01. Warrior's Quest js exam

function solve(args) {
  let skillDeciphered = args.shift();
  const commandList = ['GladiatorStance', 'DefensiveStance', 'Dispel', 'Target'];


  let commandLine = args.shift();
  while (commandLine !== 'For Azeroth') {
    const [command, index, char] = commandLine.split(' ');

    if (commandList.includes(command)) {
      switch (command) {
        case 'GladiatorStance':
          skillDeciphered = skillDeciphered.toUpperCase();
          console.log(skillDeciphered);
          break;
        case 'DefensiveStance':
          skillDeciphered = skillDeciphered.toLowerCase();
          console.log(skillDeciphered);
          break;
        case 'Dispel':
          const indexForChange = Number(index);
          if (skillDeciphered[indexForChange]) {
            skillDeciphered = skillDeciphered.split('');
            skillDeciphered.splice(Number(index), 1, char);
            skillDeciphered = skillDeciphered.join('');
            console.log('Success!');
          } else {
            console.log('Dispel too weak.');
          }

          break;
        case 'Target':
          const [, commandInfo, strArg, strArg2] = commandLine.split(' ');

          if (commandInfo === 'Change') {
            while (skillDeciphered.includes(strArg)) {
              skillDeciphered = skillDeciphered.replace(strArg, strArg2);
            }

            console.log(skillDeciphered);
          } else if (commandInfo === 'Remove') {
            while (skillDeciphered.includes(strArg)) {
              skillDeciphered = skillDeciphered.replace(strArg, '');
            }
            console.log(skillDeciphered);
          } else {
            console.log("Command doesn't exist!");
          }
          break;
        default:
          break;
      }
    } else {
      console.log("Command doesn't exist!");
    }

    commandLine = args.shift();
  }
}