8.0.0-0

Added

• .getOptionValue() and .setOptionValue() (#1521)
• .hook() with support for 'preAction' and 'postAction' callbacks (#1514)
• .argument(name, description) for adding command-arguments (#1490)
  • supports default value for optional command-arguments (#1508)
  • supports custom processing function (#1508)
• .createArgument() factory method (#1497)
• the number of command-arguments is checked for programs without an action handler (#1502)

Changed

• refactor and simplify TypeScript declarations (with no default export) (#1520)
• .parseAsync() is now declared as async (#1513)
• Breaking: Help method .visibleArguments() returns array of Argument (#1490)
• Breaking: Commander 8 requires Node.js 12 or higher (#1500)
• Breaking: CommanderError code commander.invalidOptionArgument renamed commander.invalidArgument (#1508)
• Breaking: TypeScript declaration for .addTextHelp() callback no longer allows result of undefined, now just string (#1516)

Deprecated

• second parameter of cmd.description(desc, argDescriptions) for adding argument descriptions (#1490)
  • (use new .argument(name, description) instead)
• InvalidOptionArgumentError (replaced by InvalidArgumentError) (#1508)

Removed

• Breaking: TypeScript declaration for default export of global Command object (#1520)
  • (still available as named program export)