Use CommonJS on the playground test, due to the limit of JSOO

Author: cometkim

CONTRIBUTING.md

@@ -262,7 +262,7 @@ $ node
 
 ### Testing the Playground bundle
 
-Run `node playground/playground_test.js` for a quick sanity check to see if all the build artifacts are working together correctly. When releasing the playground bundle, the test will always be executed before publishing to catch regressions.
+Run `node playground/playground_test.cjs` for a quick sanity check to see if all the build artifacts are working together correctly. When releasing the playground bundle, the test will always be executed before publishing to catch regressions.
 
 ### Working on the Playground JS API
 
@@ -272,7 +272,7 @@ Whenever you are modifying any files in the ReScript compiler, or in the `jsoo_p
 make playground
 
 # optionally run your test / arbitrary node script to verify your changes
-node playground/playground_test.js
+node playground/playground_test.cjs
 ```
 
 ### Publishing the Playground Bundle on our KeyCDN

Makefile

@@ -73,7 +73,7 @@ playground-cmijs: artifacts
 # Builds the playground, runs some e2e tests and releases the playground to the
 # CDN (requires KEYCDN_USER and KEYCDN_PASSWORD set in the env variables)
 playground-release: playground playground-cmijs
-	node playground/playground_test.js
+	node playground/playground_test.cjs
 	sh playground/upload_bundle.sh
 
 format:

playground/playground_test.js renamed to playground/playground_test.cjs

@@ -1,6 +1,6 @@
-import "./compiler.js";
-import "./packages/compiler-builtins/cmij.js";
-import "./packages/@rescript/react/cmij.js";
+require("./compiler.js");
+require("./packages/compiler-builtins/cmij.js");
+require("./packages/@rescript/react/cmij.js");
 
 const compiler = rescript_compiler.make();