fix: superfluous error message in dev mode (#4)

Author: TheAlexLichter

README.md

@@ -45,7 +45,7 @@ Before diving into the individual attributes, here are the default settings of t
 ```js
 {
   mode: MODES.webpack,
-  enabled: ({ isDev, isClient }) => (!isDev && isClient),
+  enabled: ({ isDev, isClient }) => (!isDev && isClient), // or `false` when in dev/debug mode
   paths: [
     'components/**/*.vue',
     'layouts/**/*.vue',
@@ -93,11 +93,11 @@ Defines the mode, PurgeCSS should be used in.
 #### enabled
 
 * Type: `Boolean` or `Function` (only for webpack mode, will receive the build.extend ctx)
-* Default: `({ isDev, isClient }) => (!isDev && isClient)` (Only activates in production mode)
+* Default: `({ isDev, isClient }) => (!isDev && isClient)` (only activates in production mode) or `false` in debug/dev mode
 
 Enables/Disables the module
 
-* If false, the module won't be activated at all
+* If it evaluates to false, the module won't be activated at all
 * If a function is given, it'll be properly evaluated in webpack mode (in postcss mode it'll be handled as true)
 
 

lib/module.js

@@ -15,7 +15,7 @@ export default function nuxtPurgeCss() {
 
   const defaults = {
     mode: MODES.webpack,
-    enabled: ({ isDev, isClient }) => (!isDev && isClient),
+    enabled: this.options.debug ? false : ({ isDev, isClient }) => (!isDev && isClient),
     paths: [
       'components/**/*.vue',
       'layouts/**/*.vue',

test/fixture/configs/webpack/dev.js

@@ -0,0 +1,23 @@
+const { resolve } = require('path')
+
+module.exports = {
+  rootDir: resolve(__dirname, '../../../../'),
+  srcDir: resolve(__dirname, '../../'),
+  css: ['~/assets/a.css'],
+  render: {
+    resourceHints: false
+  },
+  modules: ['@@'],
+  build: {
+    quiet: false,
+    extractCSS: true,
+    optimization: {
+      splitChunks: {
+        name: true
+      }
+    },
+    filenames: {
+      css: () => '[name].css'
+    }
+  }
+}

test/module.test.js

@@ -40,6 +40,13 @@ describe('nuxt-purgecss', () => {
       expect(testCSS).toMatch('.ymca')
     })
 
+    test('don\'t show webpack error message in dev', async () => {
+      nuxt = await setupNuxt(require('./fixture/configs/webpack/dev'))
+
+      const consolaMessages = log.mock.calls.map(c => c[0].message)
+      expect(consolaMessages).not.toContain('Webpack mode only works with build.extractCSS set to *true*. Either extract your CSS or use \'postcss\' mode')
+    })
+
     test('globally disable module', async () => {
       nuxt = await setupNuxt(require('./fixture/configs/webpack/disabled'))