Cannot read property 'hex' of undefined (only with v2.3.0)

Hi,

I use chalk to add colors to console logs in a personal project (create-cozy-app) and thanks a lot for your great job on this module 👍

But something seems broken since the version 2.3.0. I use almost only the chalk.hex() method and I got this issue:

myapptest/node_modules/cozy-scripts/node_modules/chalk/index.js:82
				const open = ansiStyles.color[levelMapping[level]][model].apply(null, arguments);
				                                                  ^

TypeError: Cannot read property 'hex' of undefined
    at Function.<anonymous> (myapptest/node_modules/cozy-scripts/node_modules/chalk/index.js:82:55)
    at Object.<anonymous> (myapptest/node_modules/cozy-scripts/utils/_colorize.js:7:15)
    at Module._compile (module.js:643:30)
    at Object.Module._extensions..js (module.js:654:10)
    at Module.load (module.js:556:32)
    at tryModuleLoad (module.js:499:12)
    at Function.Module._load (module.js:491:3)
    at Module.require (module.js:587:17)
    at require (internal/module.js:11:18)

All work well with the version 2.2.2 but also if I only use default colors (chalk.blue(), chalk.bgWhite()). And it seems to concern only my webpack usage like here or here. I suppose that came from this commit so: https://github.com/chalk/chalk/commit/7be154c074026f77b99e7d854b3a4cdd5e4ae502

Hope that will help.

[danfuzz]

Thanks to @partheseas’s work mentioned in #224, I was able to distill out an even better demonstration. It’s not constructor-vs-not (that was a red herring) but rather what level is enabled:

const chalk = require("chalk")

const c1 = new chalk.constructor({ level: 1 });
const c2 = new chalk.constructor({ level: 2 });
const c3 = new chalk.constructor({ level: 3 });
const c4 = new chalk.constructor({ level: 4 });
console.log(c1.hex('123')('foo'));
console.log(c2.hex('123')('foo'));
console.log(c3.hex('123')('foo'));
console.log(c4.hex('123')('foo'));

This example works, except for the last line, which fails per the original description of this bug.

[danfuzz]

Oh, my apologies. I thought it went to 4. (By way of suggestion, maybe the constructor should throw if given a bogus level.)