Read input file

src/app/components/editor/editor.component.ts

@@ -71,6 +71,12 @@ export class EditorComponent {
     for (const language of this.languages) {
       if (language.extensions.some(ext => file.name.endsWith(`.${ext}`))) {
         this.selectedLanguage = language;
+        const reader = new FileReader();
+        reader.onload = (event) => {
+          this.editorContent = event.target!.result as string;
+          this.errorMessage = '';
+        };
+        reader.readAsText(file);
         return;
       }
     }