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最近在项目中需要用到sass，安装sass-loader后发生错误：
INFO Starting development server...
ERROR Error: Rule can only have one resource source (provided resource and
test + include + exclude) in {
"exclude": [
null
],
"use": [
{
"loader":
"D:\\zenos\\study-vue1\\node_modules\\cache-loader\\dist\\cjs.js",
"options": {
"cacheDirectory":
"D:\\zenos\\study-vue1\\node_modules\\.cache\\babel-loader",
"cacheIdentifier": "55e5131a"
},
"ident": "clonedRuleSet-38[0].rules[0].use[0]"
},
{
"loader":
"D:\\zenos\\study-vue1\\node_modules\\babel-loader\\lib\\index.js",
"options": "undefined",
"ident": "undefined"
}
]
}
Error: Rule can only have one resource source (provided resource and test +
include + exclude) in {
"exclude": [
null
],
"use": [
{
"loader":
"D:\\zenos\\study-vue1\\node_modules\\cache-loader\\dist\\cjs.js",
"options": {
"cacheDirectory":
"D:\\zenos\\study-vue1\\node_modules\\.cache\\babel-loader",
"cacheIdentifier": "55e5131a"
},
"ident": "clonedRuleSet-38[0].rules[0].use[0]"
},
{
"loader":
"D:\\zenos\\study-vue1\\node_modules\\babel-loader\\lib\\index.js",
"options": "undefined",
"ident": "undefined"
}
]
}
可能的原因就是默认的sass或者webpack版本太高了，从而导致不兼容，把之前的高版本卸载，安装低版本就行
卸载当前版本sass-loader命令：npm uninstall sass-loader
安装低版本的sass-loader命令：npm install sass-loader@7.3.1 --save-dev
（需要安装node-sass的话：npm install node-sass --save）
还不行的话：
卸载当前版本webpack命令：npm uninstall webpack
安装低版本的webpack命令：npm install webpack@^4.0.0 --save-dev