schnee effeckt und fehler Korektur

node_modules/browserslist/node.js

@@ -82,11 +82,24 @@ function pickEnv(config, opts) {
     name = 'production'
   }
 
+  if (opts.throwOnMissing) {
+    if (name && name !== 'defaults' && !config[name]) {
+      throw new BrowserslistError(
+        'Missing config for Browserslist environment `' + name + '`'
+      )
+    }
+  }
+
   return config[name] || config.defaults
 }
 
 function parsePackage(file) {
-  var config = JSON.parse(fs.readFileSync(file))
+  var config = JSON.parse(
+    fs
+      .readFileSync(file)
+      .toString()
+      .replace(/^\uFEFF/m, '')
+  )
   if (config.browserlist && !config.browserslist) {
     throw new BrowserslistError(
       '`browserlist` key instead of `browserslist` in ' + file
@@ -230,7 +243,12 @@ module.exports = {
   loadCountry: function loadCountry(usage, country, data) {
     var code = country.replace(/[^\w-]/g, '')
     if (!usage[code]) {
-      var compressed = require('caniuse-lite/data/regions/' + code + '.js')
+      var compressed
+      try {
+        compressed = require('caniuse-lite/data/regions/' + code + '.js')
+      } catch (e) {
+        throw new BrowserslistError('Unknown region name `' + code + '`.')
+      }
       var usageData = region(compressed)
       normalizeUsageData(usageData, data)
       usage[country] = {}
@@ -245,13 +263,18 @@ module.exports = {
   loadFeature: function loadFeature(features, name) {
     name = name.replace(/[^\w-]/g, '')
     if (features[name]) return
-
-    var compressed = require('caniuse-lite/data/features/' + name + '.js')
+    var compressed
+    try {
+      compressed = require('caniuse-lite/data/features/' + name + '.js')
+    } catch (e) {
+      throw new BrowserslistError('Unknown feature name `' + name + '`.')
+    }
     var stats = feature(compressed).stats
     features[name] = {}
     for (var i in stats) {
+      features[name][i] = {}
       for (var j in stats[i]) {
-        features[name][i + ' ' + j] = stats[i][j]
+        features[name][i][j] = stats[i][j]
       }
     }
   },
@@ -372,14 +395,16 @@ module.exports = {
     if (latest !== 0 && latest < halfYearAgo) {
       console.warn(
         'Browserslist: caniuse-lite is outdated. Please run:\n' +
-          '  npx browserslist@latest --update-db\n' +
+          '  npx update-browserslist-db@latest\n' +
           '  Why you should do it regularly: ' +
-          'https://github.com/browserslist/browserslist#browsers-data-updating'
+          'https://github.com/browserslist/update-db#readme'
       )
     }
   },
 
   currentNode: function currentNode() {
     return 'node ' + process.versions.node
-  }
+  },
+
+  env: process.env
 }