feat: highlight active line in codemirror when focused

helpers/editor/codemirror.ts

@@ -23,6 +23,7 @@ import "codemirror/addon/search/search"
 import "codemirror/addon/search/searchcursor"
 import "codemirror/addon/search/jump-to-line"
 import "codemirror/addon/dialog/dialog"
+import "codemirror/addon/selection/active-line"
 
 import { watch, onMounted, ref, Ref, useContext } from "@nuxtjs/composition-api"
 import { LinterDefinition } from "./linting/linter"
@@ -45,6 +46,7 @@ const DEFAULT_EDITOR_CONFIG: CodeMirror.EditorConfiguration = {
     "Ctrl-Space": "autocomplete",
   },
   viewportMargin: Infinity,
+  styleActiveLine: true,
 }
 
 /**