Add `undefined` check

[michael-ciniawsky]

Details

Check forundefined in the plugin loader (postcss-load-plugins #67)

- if (options === null || Object.keys(options).length === 0)
+ if (options === null || options === undefined || Object.keys(options).length === 0)

Its being tested only if the options {Object} is null, if the {Object} is not null it tries to
look at the keys of the {Object}, but I believe that its being forgotten the case when the options {Object} is undefined

Error (Logs|Stacks)

postcss.config.js

module.exports = ({ file, options, env }) => {
    return {
        parser: file.extname === '.sss' ? 'sugarss' : false,
        plugins: {
            'postcss-import': { root: file.dirname },
            'postcss-cssnext': options.cssnext ? options.cssnext : false, // <=
            'autoprefixer': env == 'production' ? options.autoprefixer : false,
            'cssnano': env === 'production' ? options.cssnano : false
        }
    }
}

Module build failed: TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at load (/home/matheus/Repositorios/fidelidade-online/node_modules/postcss-load-plugins/lib/plugins.js:42:38)
    at /home/matheus/Repositorios/fidelidade-online/node_modules/postcss-load-plugins/lib/plugins.js:66:18
    at Array.forEach (<anonymous>)
    at plugins (/home/matheus/Repositorios/fidelidade-online/node_modules/postcss-load-plugins/lib/plugins.js:65:8)
    at /home/matheus/Repositorios/fidelidade-online/node_modules/postcss-load-config/index.js:64:18
    at <anonymous>

Reproduction (Code)

• Not needed

Environment

• Not needed

[arthurbuhl]

I think maybe we can just do:

- if (options === null || options === undefined || Object.keys(options).length === 0)
+ if (!options || Object.keys(options).length === 0)

[michael-ciniawsky]

Would love to but !options coerces null, false, undefined to false, while options === false means don't load this plugin in postcss-load-config e.g

.postcssrc.js

module.exports = ({ options, env }) => {
  plugins: {
     // Check for options.plugin === 'undefined', 
     // but load the plugin with defaults (the current bug)
     'postcss-plugin': options.plugin 
     // if env === 'development' don't load the plugin
     'cssnano': env === 'production' ? null : false
  }
}

[arthurbuhl]

Ok, that make sense then.