This module introduces you to Interfaces in TypeScript.
The objectives of this module are to provide you with an understanding of:
- How to use Function Types
- How to use Optionals
- How to use Excess Property Checks
- How to use Indexable Types
- How Interfaces work with Classes
- How to create Extendable Interfaces
This learning path is aimed at all who wish to learn how to use TypeScript
We welcome all feedback and suggestions - please contact us at firstname.lastname@example.org to let us know what you think.
Optional properties and functions can be included in interfaces to make it more flexible. A property or function is made optional by adding a question mark after its name. In the vehicle interface, there is an optional property of fluxcapacitor. If it's there it must be a boolean. There are also two optional functions that accelerate in time travel, and these have specified arguments and return types. We have two cars that implement vehicle, one without a fluxcapacitor among with, both implement the time travel method one car boolean will lock out the time travel not possible. Whereas car two will lock out time travel possible. This is an example of optional properties being used in functions and logic related to using a vehicle.
Ed is an Outstanding Trainer in Software Development, with a passion for technology and its uses and holding more than 10 years’ experience.
Ed is responsible for delivering QA’s Programming Foundations course using the Eclipse IDE. His skillset extends into the DevOps sphere, where he is able to deliver courses based around Agile/Scrum practices, version control, and CI/CD.