Create contains.js in Javascript/src/recursion

algorithms/JavaScript/src/recursion/contains.js

@@ -0,0 +1,38 @@
+//Write a function called `contains` that searches for a value in a nested object. It returns true if the object contains that value.
+
+```javascript
+var nestedObject = {
+    data: {
+        info: {
+            stuff: {
+                thing: {
+                    moreStuff: {
+                        magicNumber: 44
+                    }
+                }
+            }
+        }
+    }
+}
+
+contains(nestedObject, 44) // true
+contains(nestedObject, "foo") // false
+```
+
+// Solution
+const contains = (object, checkValue) => {
+    if (object == null || Object.keys(object).length === 0) {
+        return false;
+    }
+
+    for (let [key, value] of Object.entries(object)) {
+        if (key === checkValue || value === checkValue) {
+            return true;
+        }
+        if (typeof value === 'object' && contains(value, checkValue)) {
+            return true;
+        }
+    }
+
+    return false;
+};