Calling JavaScript Functions

Functions in JavaScript are a little bit tricky to be implemented because of its client side behavior. Aside from considering the reaction of the server to the requested function, developers have to take care of the reaction of the function with the data once it has been launched. Without proper calling, the function will not be implemented which means the application will not function as expected.

The following are the 4 “rules” that you every developer should know when they are calling functions in JavaScript. These rules are the basis for the additional rules with calling more functions in JavaScript.

Rule # 1: Explicit Object is a Must

The beauty of JavaScript is that any form of coding could actually be interpreted as a valid argument. But this causes problems especially when you want to be specific on your implementation of functions. For that reason, you have to be specific on calling your object.

For example, you have to say function() to denote the specific object. If the developer ignores this and proceeds with the function, it could be regarded as the default object which means it will be overshadowing other objects in the application.

Rule # 2: Invocation Syntax could Transform Variables into Objects

Invocation syntax is basically the second stage of an object wherein an object has already been established and some variables will be added as a complement. The variables should be left as it is simply because they are very important data. This is considered a “’bug” in JavaScript since the invocation syntax will need some variables to be fully implemented. But it could happen that instead of reading the variables as it is, they will be regarded as an object. Be careful around this form of function to ensure the right data is being used.

Rule # 3: Overriding Objects Should be Simplified

There are times wherein an object needs to be replaced because it can’t provide the expected output. Instead of replacing the most part of the coding, developers can just override the said object. But this could be very difficult especially when new functions could be implemented.

Because of this difficulty, it is strongly advised to change only when the necessity is only based on name change and not on entire functions. It would be a lot easier to create new functions instead of replacing and editing the old one.

Rule # 4: Careful with constructors

JavaScript developers always have to double check their constructors. Like the previous problem concerning invocation syntax, without careful usage of constructors could lead to a buggy function. Constructors could mistake the variables into objects which will lead to a buggy application.

These are the four rules that every developer should remember in calling functions. From syntax to constructors, developers have to be smart on when and where these functions are applicable. Although they could provide the needed functions at first, careful monitoring should be done on functions since they can overlap and make some changes in the application without the developer knowing about it.