Spaces:
Running
Running
; | |
// This is an example of using tokens to add a custom behaviour. | |
// | |
// Throw an error if an option is used more than once. | |
// 1. const { parseArgs } = require('node:util'); // from node | |
// 2. const { parseArgs } = require('@pkgjs/parseargs'); // from package | |
const { parseArgs } = require('..'); // in repo | |
const options = { | |
ding: { type: 'boolean', short: 'd' }, | |
beep: { type: 'boolean', short: 'b' } | |
}; | |
const { values, tokens } = parseArgs({ options, tokens: true }); | |
const seenBefore = new Set(); | |
tokens.forEach((token) => { | |
if (token.kind !== 'option') return; | |
if (seenBefore.has(token.name)) { | |
throw new Error(`option '${token.name}' used multiple times`); | |
} | |
seenBefore.add(token.name); | |
}); | |
console.log(values); | |
// Try the following: | |
// node no-repeated-options --ding --beep | |
// node no-repeated-options --beep -b | |
// node no-repeated-options -ddd | |