Remove spec-compliant URLSearchParams if not enabled by compatibili…

…ty flag

src/workerd/api/url-standard.h

@@ -95,7 +95,19 @@ class URLSearchParams: public jsg::Object {
     JSG_METHOD(toString);
     JSG_ITERABLE(entries);
 
-    if (flags.getUrlSearchParamsDeleteHasValueArg()) {
+    if (!flags.getSpecCompliantUrl()) {
+      // This is a hack. The spec-compliant URLSearchParams type is used in
+      // the Body constructor, see:
+      // https://github.com/balusch/workerd/tree/main/src/workerd/api/http.h#L255
+      // This means that when the TypeScript generation scripts are visiting root types for inclusion,
+      // we'll always visit the spec-compliant type even if we have the
+      // "url-standard" flag disabled. Rather than updating those usages based
+      // on which flags are enabled, we just delete the spec compliant
+      // declaration in an override if "url-standard" is disabled.
+      // We do the same for the non-spec-compliant URLSearchParams, see:
+      // https://github.com/balusch/workerd/tree/main/src/workerd/api/url.h#L219
+      JSG_TS_OVERRIDE(type URLSearchParams = never);
+    } else if (flags.getUrlSearchParamsDeleteHasValueArg()) {
       JSG_TS_OVERRIDE(URLSearchParams {
         entries(): IterableIterator<[key: string, value: string]>;
         [Symbol.iterator](): IterableIterator<[key: string, value: string]>;