Remove private named property declaration initializer in TS transform

Author: Joseph Watts

src/compiler/transformers/ts.ts

@@ -2239,8 +2239,16 @@ namespace ts {
 
         function visitPropertyDeclaration(node: PropertyDeclaration): PropertyDeclaration | undefined {
             if (isPrivateName(node.name)) {
-                // Keep the private name declaration.
-                return node;
+                // Keep the private name declaration (without the initializer - which will be moved to the constructor).
+                return updateProperty(
+                    node,
+                    node.decorators,
+                    node.modifiers,
+                    node.name,
+                    node.questionToken,
+                    node.type,
+                    /*initializer*/ undefined
+                );
             }
             const expr = getPropertyNameExpressionIfNeeded(node.name, some(node.decorators) || !!node.initializer, /*omitSimple*/ true);
             if (expr && !isSimpleInlineableExpression(expr)) {