Works. Uses match(), global flag on the regex.

countCode.js

@@ -0,0 +1,13 @@
+// Return the number of times that the string "code" appears anywhere in the given string, except we'll accept any letter for the 'd', so "cope" and "cooe" count.
+
+const countCode = (haystack) => {
+    const needle = /co.e/ig;
+    const successes = haystack.match(needle);
+    return successes.length;
+};
+
+console.log(countCode("aaacodebbb")); // 1
+console.log(countCode("codexxcode")); // 2
+console.log(countCode("cozexxcope")); // 2
+
+// Next How to do this (in node?) Typescript