added various implementation of reversing a String in JavaScript

Author: namitmalasi

ReverseString.js

@@ -0,0 +1,45 @@
+// Reversing a String in JavaScript.
+
+// Approach1
+
+function reverse(str) {
+  return str.split("").reverse().join("");
+}
+
+console.log(reverse("Namit"));
+
+// Approach 2(Using ES6 syntax)
+
+function reverse(str) {
+  return [...str].reverse().join("");
+}
+
+console.log(reverse("Namit"));
+
+// Approach3(Without using in-built methods)
+
+function reverse(str) {
+  let newString = "";
+  for (let i = str.length - 1; i >= 0; i--) {
+    newString = newString + str[i];
+  }
+  return newString;
+}
+console.log(reverse("Namit"));
+
+// Approach4(using recursion)
+
+function reverse(str) {
+  if (str === "") {
+    return "";
+  }
+  return reverse(str.substr(1)) + str.charAt(0);
+}
+console.log(reverse("Namit"));
+
+// Approach5(Using reduce function)
+
+function reverse(str) {
+  return str.split("").reduce((acc, item) => item + acc, "");
+}
+console.log(reverse("Namit"));