create-react-app

Former-commit-id: 33647ef65cbac1c89c16a8b81dfa7de0fad5af3e

1 files changed, 13 insertions, 0 deletions

diff --git a/examples/hello-create-react-app/src/reportWebVitals.js b/examples/hello-create-react-app/src/reportWebVitals.js
new file mode 100644
index 000000000..5253d3ad9
--- /dev/null
+++ b/examples/hello-create-react-app/src/reportWebVitals.js
@@ -0,0 +1,13 @@
+const reportWebVitals = onPerfEntry => {
+  if (onPerfEntry && onPerfEntry instanceof Function) {
+    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
+      getCLS(onPerfEntry);
+      getFID(onPerfEntry);
+      getFCP(onPerfEntry);
+      getLCP(onPerfEntry);
+      getTTFB(onPerfEntry);
+    });
+  }
+};
+
+export default reportWebVitals;