react app

react-app/node_modules/is-integer/index.js

@@ -0,0 +1,8 @@
+// https://github.com/paulmillr/es6-shim
+// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isinteger
+var isFinite = require("is-finite");
+module.exports = Number.isInteger || function(val) {
+  return typeof val === "number" &&
+    isFinite(val) &&
+    Math.floor(val) === val;
+};