new method to check if a string is valid email id or not added

src/emailchecker.js

@@ -0,0 +1,16 @@
+export default checker
+
+/**
+ * This method checks whether the given string is valid email ID or not
+ * @param {String} val - imput email id
+ * @return {Boolean} - return true if the input string is valid email ID otherwise false
+ */
+ function checker(val){
+     var reg=/^([A-Za-z0-9_\.\-]{1,})\@([A-Za-z0-9]{1,})\.([A-Za-z]{2,4})$/;
+     if (reg.test(val)==false){
+       return false
+     }
+     else{
+       return true
+     }
+   }