polish: fix deno TS errors

resources/inline-invariant.ts

@@ -9,7 +9,7 @@ import ts from 'typescript';
  *
  * to:
  *
- *  (<cond>) || invariant(false ...)
+ *  if (!(<cond>)) invariant(false, ...)
  */
 export function inlineInvariant(context: ts.TransformationContext) {
   const { factory } = context;
@@ -21,25 +21,38 @@ export function inlineInvariant(context: ts.TransformationContext) {
   }
 
   function visitNode(node: ts.Node): ts.Node {
-    if (ts.isCallExpression(node)) {
-      const { expression, arguments: args } = node;
-
-      if (ts.isIdentifier(expression) && args.length > 0) {
-        const funcName = expression.escapedText;
-        if (funcName === 'invariant' || funcName === 'devAssert') {
-          const [condition, ...otherArgs] = args;
-
-          return factory.createBinaryExpression(
-            factory.createParenthesizedExpression(condition),
-            ts.SyntaxKind.BarBarToken,
-            factory.createCallExpression(expression, undefined, [
-              factory.createFalse(),
-              ...otherArgs,
-            ]),
-          );
+    if (ts.isExpressionStatement(node)) {
+      const expression = node.expression;
+
+      if (ts.isCallExpression(expression)) {
+        const { arguments: args } = expression;
+
+        if (ts.isIdentifier(expression.expression) && args.length > 0) {
+          const funcName = expression.expression.escapedText;
+          if (funcName === 'invariant' || funcName === 'devAssert') {
+            const [condition, ...otherArgs] = args;
+            if (condition.kind === ts.SyntaxKind.FalseKeyword) {
+              return node;
+            }
+            const inverseCondition = factory.createPrefixUnaryExpression(
+              ts.SyntaxKind.ExclamationToken,
+              factory.createParenthesizedExpression(condition),
+            );
+
+            return factory.createIfStatement(
+              inverseCondition,
+              factory.createExpressionStatement(
+                factory.createCallExpression(expression.expression, undefined, [
+                  factory.createFalse(),
+                  ...otherArgs,
+                ]),
+              ),
+            );
+          }
         }
       }
     }
+
     return ts.visitEachChild(node, visitNode, context);
   }
 }

src/utilities/buildClientSchema.ts

@@ -190,14 +190,16 @@ export function buildClientSchema(
         return buildEnumDef(type);
       case TypeKind.INPUT_OBJECT:
         return buildInputObjectDef(type);
+      default:
+        // TypeScript considers this unreachable, but invalid runtime input can reach it.
+        // Note: we include a default case rather than throwing after the switch to avoid
+        // the use of a @ts-expect-error statement.
+        throw new Error(
+          `Invalid or incomplete introspection result. Ensure that a full introspection query is used in order to build a client schema: ${inspect(
+            type,
+          )}.`,
+        );
     }
-    // Unreachable.
-    // @ts-expect-error
-    throw new Error(
-      `Invalid or incomplete introspection result. Ensure that a full introspection query is used in order to build a client schema: ${inspect(
-        type,
-      )}.`,
-    );
   }
 
   function buildScalarDef(