"sass": "^1.77.5", "sass-loader": "^14.2.1",怎么确定是否成功安装

"Sass" 和 "sass-loader" 是用于CSS预处理器（Sass）的Node.js模块，它们在前端开发中很常见，用来将Sass语法编译成CSS。"^1.77.5" 和 "^14.2.1" 分别是Sass主库和loader的版本号。

要确认这两个模块是否成功安装在您的项目中，您可以按照以下步骤操作：

1. **在终端或命令提示符**（取决于您使用的操作系统）中，打开您的项目文件夹。
2. 执行 `npm list sass sass-loader` 或者 `yarn list sass sass-loader`，这会显示依赖项及其版本。如果这两个模块出现在列表中，并且对应版本号为 `1.77.5` 和 `14.2.1` 或更高版本，那就说明安装成功了。
3. 如果 `npm ls` 或 `yarn.lock` 文件中存在这两个模块的信息，那也是安装成功的标志。

如果安装未成功，可能会看到错误信息，比如缺失的依赖或版本不匹配。确保已经全局安装了`node-sass`（Sass编译器），如果没有，可以用`npm install -g node-sass` 或 `yarn global add node-sass`进行安装。

相关问题

当采用 "sass": "1.26.8", "sass-loader": "8.0.2"版本时， "autoprefixer": "^7.1.2", "babel-core": "^6.22.1", "babel-helper-vue-jsx-merge-props": "^2.0.3", "babel-loader": "^7.1.1", "babel-plugin-syntax-jsx": "^6.18.0", "babel-plugin-transform-runtime": "^6.22.0", "babel-plugin-transform-vue-jsx": "^3.5.0", "babel-preset-env": "^1.3.2", "babel-preset-stage-2": "^6.22.0", "chalk": "^2.0.1", "copy-webpack-plugin": "^4.0.1", "css-loader": "^0.28.0", "extract-text-webpack-plugin": "^3.0.0", "file-loader": "^1.1.4", "friendly-errors-webpack-plugin": "^1.6.1", "html-webpack-plugin": "^2.30.1", "node-notifier": "^5.1.2", "optimize-css-assets-webpack-plugin": "^3.2.0", "ora": "^1.2.0", "portfinder": "^1.0.13", "postcss-import": "^11.0.0", "postcss-loader": "^2.0.8", "postcss-url": "^7.2.1", "rimraf": "^2.6.0", "sass": "1.26.8", "sass-loader": "8.0.2", "script-loader": "^0.7.2", "semver": "^5.3.0", "shelljs": "^0.7.6", "uglifyjs-webpack-plugin": "^1.1.1", "url-loader": "^0.5.8", "vue-loader": "^13.3.0", "vue-style-loader": "^3.0.1", "vue-template-compiler": "^2.5.2", "webpack": "^3.6.0", "webpack-bundle-analyzer": "^2.9.0", "webpack-dev-server": "^2.9.1", "webpack-merge": "^4.1.0"采用哪个版本匹配

当采用这些版本时，你可以使用以下版本来匹配：
- "sass": "1.26.8"
- "sass-loader": "8.0.2"
- "autoprefixer": "^7.1.2"
- "babel-core": "^6.22.1"
- "babel-helper-vue-jsx-merge-props": "^2.0.3"
- "babel-loader": "^7.1.1"
- "babel-plugin-syntax-jsx": "^6.18.0"
- "babel-plugin-transform-runtime": "^6.22.0"
- "babel-plugin-transform-vue-jsx": "^3.5.0"
- "babel-preset-env": "^1.3.2"
- "babel-preset-stage-2": "^6.22.0"
- "chalk": "^2.0.1"
- "copy-webpack-plugin": "^4.0.1"
- "css-loader": "^0.28.0"
- "extract-text-webpack-plugin": "^3.0.0"
- "file-loader": "^1.1.4"
- "friendly-errors-webpack-plugin": "^1.6.1"
- "html-webpack-plugin": "^2.30.1"
- "node-notifier": "^5.1.2"
- "optimize-css-assets-webpack-plugin": "^3.2.0"
- "ora": "^1.2.0"
- "portfinder": "^1.0.13"
- "postcss-import": "^11.0.0"
- "postcss-loader": "^2.0.8"
- "postcss-url": "^7.2.1"
- "rimraf": "^2.6.0"
- "sass": "1.26.8"
- "sass-loader": "8.0.2"
- "script-loader": "^0.7.2"
- "semver": "^5.3.0"
- "shelljs": "^0.7.6"
- "uglifyjs-webpack-plugin": "^1.1.1"
- "url-loader": "^0.5.8"
- "vue-loader": "^13.3.0"
- "vue-style-loader": "^3.0.1"
- "vue-template-compiler": "^2.5.2"
- "webpack": "^3.6.0"
- "webpack-bundle-analyzer": "^2.9.0"
- "webpack-dev-server": "^2.9.1"
- "webpack-merge": "^4.1.0"

10:35:56.822 Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/sass-loader/dist/cjs.js): 10:35:56.830 SassError: Undefined variable: "$u-form-item-height". 10:35:56.830 on line 210 of D:\ideaWorkSpace\ehl-wx\applicationCenter\knowledgeBase\addQuestion.vue 10:35:56.839 >> line-height: $u-form-item-height; 10:35:56.848 ------------------^ 10:35:56.856 Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/sass-loader/dist/cjs.js): 10:35:56.863 SassError: Undefined variable: "$u-form-item-height". 10:35:56.873 on line 220 of D:\ideaWorkSpace\ehl-wx\applicationCenter\examine\answerQuestion.vue 10:35:56.873 >> line-height: $u-form-item-height; 10:35:56.880 --------------------^ 10:35:56.880 Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/sass-loader/dist/cjs.js): 10:35:56.889 SassError: Undefined variable: "$u-form-item-height". 10:35:56.896 on line 220 of D:\ideaWorkSpace\ehl-wx\applicationCenter\knowledgeBase\answerQuestion.vue 10:35:56.903 >> line-height: $u-form-item-height; 10:35:56.904 --------------------^ 10:35:56.913 Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/sass-loader/dist/cjs.js): 10:35:56.913 SassError: Undefined variable: "$u-form-item-height". 10:35:56.921 on line 232 of D:\ideaWorkSpace\ehl-wx\applicationCenter\examine\addQuestion.vue 10:35:56.930 >> line-height: $u-form-item-height; 10:35:56.930 ------------------^ 10:35:56.938 Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/sass-loader/dist/cjs.js): 10:35:56.938 SassError: Undefined variable: "$u-form-item-height". 10:35:56.946 on line 350 of D:\ideaWorkSpace\ehl-wx\pages\service\addService.vue 10:35:56.947 >> line-height: $u-form-item-height; 10:35:56.954 -------------------^解决

这个错误是因为在编译过程中找不到Sass变量"$u-form-item-height"。要解决这个问题，你可以按照以下步骤进行操作：

1. 确保你已经正确引入了uview-ui组件，并且按照官方文档的要求进行了配置。
2. 检查你的项目中是否已经安装了Sass相关的依赖。可以通过运行`npm install sass-loader node-sass`来安装这些依赖。
3. 确保在你的项目中正确配置了Sass的loader。可以在项目的webpack配置文件或vue.config.js文件中添加相应的配置，确保Sass能够正确加载和解析。
4. 检查一下uview-ui版本和你当前项目的版本是否兼容。有时候不同版本之间可能会有变量命名的差异，需要进行相应的调整。
5. 如果以上步骤都没有解决问题，可以尝试手动定义变量"$u-form-item-height"并给它赋值。你可以在项目中的Sass文件或者全局样式文件中添加以下代码：

$u-form-item-height: xxxpx; // 替换为你想要的高度值，如 "40px"

替换 "xxxpx" 为你想要的高度值。然后重新编译项目，看看是否解决了问题。

如果问题仍然存在，建议查看uview-ui的官方文档或在相关社区寻求帮助，以获取更详细的解决方案。