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Name	Size	Perms	Modified	Actions
[ .. / .. ]
is-default-value.js	765 B	-rw-r--r--	1985-10-26 08:15:00	Edit Del
limit-long-syntax.js	1.05 KB	-rw-r--r--	1985-10-26 08:15:00	Edit Del
negate.js	1.28 KB	-rw-r--r--	1985-10-26 08:15:00	Edit Del
no-repeated-options.js	897 B	-rw-r--r--	1985-10-26 08:15:00	Edit Del
ordered-options.mjs	1.36 KB	-rw-r--r--	1985-10-26 08:15:00	Edit Del
simple-hard-coded.js	540 B	-rw-r--r--	1985-10-26 08:15:00	Edit Del

Editing: negate.js (1.28 KB)

'use strict';

// This example is used in the documentation.

// How might I add my own support for --no-foo?

// 1. const { parseArgs } = require('node:util'); // from node
// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package
const { parseArgs } = require('..'); // in repo

const options = {
  'color': { type: 'boolean' },
  'no-color': { type: 'boolean' },
  'logfile': { type: 'string' },
  'no-logfile': { type: 'boolean' },
};
const { values, tokens } = parseArgs({ options, tokens: true });

// Reprocess the option tokens and overwrite the returned values.
tokens
  .filter((token) => token.kind === 'option')
  .forEach((token) => {
    if (token.name.startsWith('no-')) {
      // Store foo:false for --no-foo
      const positiveName = token.name.slice(3);
      values[positiveName] = false;
      delete values[token.name];
    } else {
      // Resave value so last one wins if both --foo and --no-foo.
      values[token.name] = token.value ?? true;
    }
  });

const color = values.color;
const logfile = values.logfile ?? 'default.log';

console.log({ logfile, color });

// Try the following:
//    node negate.js
//    node negate.js --no-logfile --no-color
//    negate.js --logfile=test.log --color
//    node negate.js --no-logfile --logfile=test.log --color --no-color