# Benefits of type

• eliminates undesirable code from being run (by being pruned during compile time)
• reality itself is typed (you cant add lengths to weight and vice versa)
• adding two lengths of different units will cause a compile error

# Benefits

• optional static typing
• type inference: omit irrelevant types
• access to the latest JS features (classes, decorators, imports) and compile down to a version of JS that runs on all browsers
• useful reference: less time figuring out what upstream API provides in terms of payload and return types
  • interface -> write down the shape of the object
  • type checking -> determine what each property requires in terms of type
• very flexible
  • turn on/off features in a config file
  • optional typing
• improve tooling (intellisense)

# optional static typing

• can be added to variables, functions, properties...
• help the compiler show warnings about potential errors before code is ever run
• when using libraries and frameworks, lets developers know exactly what type of data APIs expect
• optional!

# type inference

• TypeScript is smart enough to guess what a variable's type might be

# intellisense

• provide code hints and code completion
• provide all methods available and what they expect as arguments
• tells you when you're taking shortcuts or messing up

# References

https://softwareengineering.stackexchange.com/questions/215482/what-are-the-safety-benefits-of-a-type-system https://www.reddit.com/r/javascript/comments/78m8fp/eli5_the_benefits_of_typescript/ https://softwareengineering.stackexchange.com/questions/257450/why-is-type-inference-useful https://www.reddit.com/r/javascript/comments/68k2fz/why_typescript_is_growing_more_popular/