From the course: JavaScript: Best Practices for Functions and Classes
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Return this from methods - JavaScript Tutorial
From the course: JavaScript: Best Practices for Functions and Classes
Return this from methods
- [Instructor] Methods organized within a class provide a toolbox for use with class instances. In the code for this video, the cart class includes three methods which calculate tax, shipping and the grand total for cart contents. At the bottom of the file, I've written test code to call all three of these methods in order, and then check the result. I'm going to run that code in my browser console, and I can see that the result is an object that contains tax, shipping, and grand total properties. I can enhance my methods for this class by returning this from each one. The advantage to adding this to my code is that I can chain methods together because each method passes the result to the next method. And that lets me write more compact code that's easier to understand. Organizing code in this way creates what's known as a fluent interface. In the calcTax method, I simply add return this to the end. And likewise…
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