fix: fix compatibility with webpack 3

According to the documentation https://vue-loader.vuejs.org/guide/extract-css.html#webpack-3 and some private feedbacks, there are still many users use vue-loader v15 along with webpack 3.
vuejs · Dec 16, 2019 · 745d0542ef8ae6f6f740dfe2aeea1ba208ea293a · 745d054
1 parent 151995e
commit 745d0542ef8ae6f6f740dfe2aeea1ba208ea293a
Showing with 2 additions and 2 deletions.

+1 −1 lib/plugin.js

+1 −1 package.json
diff --git a/lib/plugin.js b/lib/plugin.js
@@ -1,7 +1,7 @@
 const webpack = require('webpack')
 let VueLoaderPlugin = null
 
-if (webpack.version[0] > 4) {
+if (webpack.version && webpack.version[0] > 4) {
   // webpack5 and upper
   VueLoaderPlugin = require('./plugin-webpack5')
 } else {

diff --git a/package.json b/package.json
@@ -34,7 +34,7 @@
   },
   "peerDependencies": {
     "css-loader": "*",
-    "webpack": "^4.1.0 || ^5.0.0-0"
+    "webpack": "^3.0.0 || ^4.1.0 || ^5.0.0-0"
   },
   "peerDependenciesMeta": {
     "cache-loader": {