search end string in another string my solution

lib/endingStrings.ts

@@ -0,0 +1,10 @@
+function solution1(str: string, ending: string): boolean {
+  if (ending === "") return true;
+  const startIndex = str.length - ending.length;
+  const subStr = str.substring(startIndex);
+  return subStr === ending;
+}
+
+console.log(solution1("abcde", "cde"), true);
+console.log(solution1("abcde", "abs"), false);
+console.log(solution1("abcde", ""), true);