vnopts/lib/handlers/unknown/leven.js

validate and normalize options

import chalk from 'chalk';
import leven from 'leven';
export const levenUnknownHandler = (key, value, { descriptor, logger, schemas }) => {
    const messages = [
        `Ignored unknown option ${chalk.yellow(descriptor.pair({ key, value }))}.`,
    ];
    const suggestion = Object.keys(schemas)
        .sort()
        .find(knownKey => leven(key, knownKey) < 3);
    if (suggestion) {
        messages.push(`Did you mean ${chalk.blue(descriptor.key(suggestion))}?`);
    }
    logger.warn(messages.join(' '));
};