JS error should use JS-char-offsets

index.d.ts

@@ -47,3 +47,25 @@ export class Preprocessor {
 */
   parse(src: string, filename?: string): Parsed[];
 }
+
+export interface ParseError {
+  source_code: string;
+  source_code_color: string;
+
+  /**
+   * 0-indexed starting line of the error
+   */
+  start_line: number;
+  /**
+   * 0-indexed starting character-based column of the error
+   */
+  start_column: number;
+  /**
+   * 0-indexed ending line of the error
+   */
+  end_line: number;
+  /**
+   * 0-indexed ending character-based column of the error
+   */
+  end_column: number;
+}

test/node-api-esm.mjs

@@ -85,17 +85,17 @@ export default template(\`Hi\`, {
 const Foo = <template>{{foo}}</template>
 
 <template>
-  <Foo />
+  🥳🥳🥳🥳<Foo />
 `);
     } catch (err) {
       parseError = err;
     }
 
     // Unexpected eof
-    // column 10 is the EOF
+    // column 14 is the EOF
     expect(parseError.start_line).to.equal(6, "start_line");
-    expect(parseError.start_column).to.equal(10, "start_column");
+    expect(parseError.start_column).to.equal(14, "start_column");
     expect(parseError.end_line).to.equal(6, "end_line");
-    expect(parseError.end_column).to.equal(10, "end_column");
+    expect(parseError.end_column).to.equal(14, "end_column");
   });
 });