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node_modules/graphql/validation/rules/NoUnusedFragments.mjs

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+import { GraphQLError } from '../../error/GraphQLError';
+export function unusedFragMessage(fragName) {
+  return "Fragment \"".concat(fragName, "\" is never used.");
+}
+/**
+ * No unused fragments
+ *
+ * A GraphQL document is only valid if all fragment definitions are spread
+ * within operations, or spread within other fragments spread within operations.
+ */
+
+export function NoUnusedFragments(context) {
+  var operationDefs = [];
+  var fragmentDefs = [];
+  return {
+    OperationDefinition: function OperationDefinition(node) {
+      operationDefs.push(node);
+      return false;
+    },
+    FragmentDefinition: function FragmentDefinition(node) {
+      fragmentDefs.push(node);
+      return false;
+    },
+    Document: {
+      leave: function leave() {
+        var fragmentNameUsed = Object.create(null);
+
+        for (var _i2 = 0; _i2 < operationDefs.length; _i2++) {
+          var operation = operationDefs[_i2];
+
+          for (var _i4 = 0, _context$getRecursive2 = context.getRecursivelyReferencedFragments(operation); _i4 < _context$getRecursive2.length; _i4++) {
+            var fragment = _context$getRecursive2[_i4];
+            fragmentNameUsed[fragment.name.value] = true;
+          }
+        }
+
+        for (var _i6 = 0; _i6 < fragmentDefs.length; _i6++) {
+          var fragmentDef = fragmentDefs[_i6];
+          var fragName = fragmentDef.name.value;
+
+          if (fragmentNameUsed[fragName] !== true) {
+            context.reportError(new GraphQLError(unusedFragMessage(fragName), fragmentDef));
+          }
+        }
+      }
+    }
+  };
+}