This error message is usually caused by missing sass-loader package. To solve this problem, you can try the following methods:
1. Confirm whether the sass-loader package has been installed in the project. This can be confirmed by running the following command in the project root directory:
npm ls sass-loader
If the sass-loader package is not displayed or the version number is displayed in red, you may need to install the sass-loader package first:
npm install --save-dev sass-loader
2. Confirm whether the node-sass package has been installed in the project. sass-loader depends on the node-sass package, if the node-sass package is not installed, the sass-loader package cannot be found. This can be confirmed by running the following command in the project root directory:
npm ls node-sass
If the node-sass package is not displayed or the version number is displayed in red, you may need to install the node-sass package first:
npm install --save-dev node-sass
3. Confirm whether the sass-loader has been correctly configured in the webpack configuration in the project. The following code can be added to the webpack configuration file:
{
test: /\.s[ac]ss$/i,
use: ['sass-loader'],
}
This code detects the presence of .scss or .sass files in the project and uses sass-loader to parse them.
If none of the above methods can solve the problem, you can try to upgrade the webpack and related dependencies in the project to the latest version, or check other possible causes of this problem, such as file path errors, etc.