Use IWYU.

examples/dom/border.cpp

@@ -1,8 +1,9 @@
-#include <chrono>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
-#include <thread>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/color_gallery.cpp

@@ -1,14 +1,16 @@
-#include <cmath>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/color_info.hpp>
 #include <ftxui/screen/screen.hpp>
 #include <ftxui/screen/terminal.hpp>
-#include <iostream>
-
-#include "ftxui/screen/string.hpp"
+#include <memory>
+#include <utility>
+#include <vector>
 
 using namespace ftxui;
 #include "./color_info_sorted_2d.ipp"  // ColorInfoSorted2D.
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(int argc, const char* argv[]) {
   // clang-format off

examples/dom/color_info_palette256.cpp

@@ -1,10 +1,13 @@
-#include <algorithm>
-#include <cmath>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/color_info.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/terminal.hpp>
-#include <iostream>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 #include "ftxui/screen/string.hpp"
 
 using namespace ftxui;

examples/dom/color_truecolor_HSV.cpp

@@ -1,10 +1,11 @@
-#include <cmath>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/terminal.hpp>
-#include <iostream>
+#include <memory>
+#include <utility>
 
-#include "ftxui/screen/string.hpp"
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/color_truecolor_RGB.cpp

@@ -1,10 +1,11 @@
-#include <cmath>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/terminal.hpp>
-#include <iostream>
+#include <memory>
+#include <utility>
 
-#include "ftxui/screen/string.hpp"
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/dbox.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/gauge.cpp

@@ -2,8 +2,12 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
 #include <iostream>
+#include <string>
 #include <thread>
 
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+
 int main(int argc, const char* argv[]) {
   using namespace ftxui;
   using namespace std::chrono_literals;

examples/dom/graph.cpp

@@ -2,9 +2,15 @@
 #include <cmath>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/string.hpp>
+#include <functional>
 #include <iostream>
+#include <string>
 #include <thread>
+#include <vector>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 class Graph {
  public:

examples/dom/hflow.cpp

@@ -1,7 +1,11 @@
+#include <stddef.h>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
 #include <ftxui/screen/string.hpp>
-#include <iostream>
+#include <string>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/html_like.cpp

@@ -1,10 +1,14 @@
 #include <chrono>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/string.hpp>
 #include <iostream>
+#include <string>
 #include <thread>
 
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
+
 int main(int argc, const char* argv[]) {
   using namespace ftxui;
   using namespace std::chrono_literals;

examples/dom/package_manager.cpp

@@ -4,9 +4,16 @@
 #include <ftxui/screen/string.hpp>
 #include <iostream>
 #include <list>
+#include <memory>
+#include <string>
 #include <thread>
+#include <utility>
 #include <vector>
 
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
+
 /// @example examples/dom/package_manage.cpp
 
 int main(int argc, const char* argv[]) {

examples/dom/paragraph.cpp

@@ -1,7 +1,10 @@
+#include <stdio.h>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <ftxui/screen/string.hpp>
-#include <iostream>
+#include <string>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/separator.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/size.cpp

@@ -1,7 +1,12 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
 #include <ftxui/screen/string.hpp>
-#include <iostream>
+#include <memory>
+#include <string>
+#include <utility>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/spinner.cpp

@@ -3,7 +3,13 @@
 #include <ftxui/screen/screen.hpp>
 #include <ftxui/screen/string.hpp>
 #include <iostream>
+#include <string>
 #include <thread>
+#include <utility>
+#include <vector>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_blink.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_bold.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_color.cpp

@@ -1,6 +1,10 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_dim.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_gallery.cpp

@@ -1,6 +1,10 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_inverted.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/style_underlined.cpp

@@ -1,6 +1,9 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/vbox_hbox.cpp

@@ -1,6 +1,10 @@
+#include <stdio.h>
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <memory>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 
 int main(int argc, const char* argv[]) {
   using namespace ftxui;

examples/dom/window.cpp

@@ -1,6 +1,10 @@
 #include <ftxui/dom/elements.hpp>
 #include <ftxui/screen/screen.hpp>
-#include <iostream>
+#include <vector>
+
+#include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
+#include "ftxui/screen/color.hpp"
 
 int main(void) {
   using namespace ftxui;