title: I was referring to Angular material for customising Typography, getting the error that SassError: Undefined variable
body: <p>here is my error</p>
  <pre><code>ERROR in ./src/secondary.scss (./node_modules/css-loader/dist/cjs.js??ref--14-1!./node_modules/postcss-loader/src??embedded!./node_modules/resolve-url-loader??ref--14-3!./node_modules/@angular-devkit/build-angular/node_modules/sass-loader/dist/cjs.js??ref--14-4!./src/secondary.scss)
  Module build failed (from ./node_modules/@angular-devkit/build-angular/node_modules/sass-loader/dist/cjs.js):
  SassError: Undefined variable.
      ╷
  120 │ @include mat-base-typography($custom-typography);
      │                              ^^^^^^^^^^^^^^^^^^
  </code></pre>