Merge pull request #389 from lightpanda-io/cdp-empty-params

chromedp: msg missing params or result

src/cdp/cdp.zig

@@ -206,6 +206,9 @@ pub fn sendEvent(
     params: T,
     sessionID: ?[]const u8,
 ) !void {
+    // some clients like chromedp expects empty parameters structs.
+    if (T == void) @compileError("sendEvent: use struct{} instead of void for empty parameters");
+
     log_cdp.debug("Event > method {s}, sessionID {?s}", .{ name, sessionID });
     const Resp = struct {
         method: []const u8,

src/cdp/page.zig

@@ -329,7 +329,7 @@ fn navigate(
 
     // Send Runtime.executionContextsCleared event
     // TODO: noop event, we have no env context at this point, is it necesarry?
-    try sendEvent(alloc, ctx, "Runtime.executionContextsCleared", void, {}, input.sessionId);
+    try sendEvent(alloc, ctx, "Runtime.executionContextsCleared", struct {}, .{}, input.sessionId);
 
     // Launch navigate, the page must have been created by a
     // target.createTarget.