Day 3 of TypeScript — As a Beginner

Things I’ve learned on day 3…

Photo by Chris Ried on Unsplash

Things that I have learned today:

1. Optional Property
2. Union Types

1. Optional Property

• Optional Property can be used for properties that are not 100% required.
• For example, take first and last names. A first name is required. However, the last name is not required, right? Except for certain situations.
• This Optional Property can be used by using ? After the variable name.
• Here’s the code for that (__without explanation __):

Optional Property

2. Union Type

• You can think of this as a possible parameter.
• For example, let’s say you want to get an input from the user which can be either a string or a number. And you can code based on your needs. Like this👇

Union Type Code Example

• Make sure to use the conditional statement for this because TS might throw an error if your code is working only for one type and not the other. Like this👇

Zoom In to See What’s in it!

That’s a wrap🚀

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