diff --git a/runtime/JavaScript/src/antlr4/Parser.d.ts b/runtime/JavaScript/src/antlr4/Parser.d.ts
index 98fd0ed762..0e9c932cfc 100644
--- a/runtime/JavaScript/src/antlr4/Parser.d.ts
+++ b/runtime/JavaScript/src/antlr4/Parser.d.ts
@@ -19,6 +19,7 @@ export declare class Parser extends Recognizer<Token> {
     matchedEOF: boolean;
     buildParseTrees: boolean;
     printer?: Printer;
+    syntaxErrorsCount: number;
 
     constructor(input: TokenStream);
     match(ttype: number): Token;
@@ -40,4 +41,5 @@ export declare class Parser extends Recognizer<Token> {
     setTokenStream(input: TokenStream): void;
     notifyErrorListeners(msg: string, offendingToken: Token, err: RecognitionException | undefined): void;
     getCurrentToken(): Token;
+    
 }
diff --git a/runtime/JavaScript/src/antlr4/Parser.js b/runtime/JavaScript/src/antlr4/Parser.js
index a2bdf5714d..4c434fd0db 100644
--- a/runtime/JavaScript/src/antlr4/Parser.js
+++ b/runtime/JavaScript/src/antlr4/Parser.js
@@ -288,6 +288,15 @@ export default class Parser extends Recognizer {
         this._input = input;
     }
 
+    /**
+	 * Gets the number of syntax errors reported during parsing. This value is
+	 * incremented each time {@link //notifyErrorListeners} is called.	 
+	 */
+    get syntaxErrorsCount() {
+        return this._syntaxErrors;
+    }
+
+
     /**
      * Match needs to return the current input symbol, which gets put
      * into the label for the associated token ref; e.g., x=ID.