How to use stylePreprocessorOptions in Angular8

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I’am trying to learn how to use common css and js across two projects(project1,project2). I have googled it to call it under stylePreprocessorOptions in angular.json as shown below

    "stylePreprocessorOptions": {
      "includePaths": [
        "styles"
      ]
    },

and in image u can find the folder outside projects folder where i used check.css in that i gave

p{
  color:red
}

but its not get affecting my P tag am i missing something please let me know how to use common css and js file across multiple project.

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Source Url How to use stylePreprocessorOptions in Angular8