What is TypeScript?
TypeScript is a strictly typed programming language. It consists of three parts:
- Programming language syntax
The tsc compiler helps to detect many defects before uploading code to production. Such defects are not always bugs. Sometimes they do not lead to a breach of the terms of reference for a long time, but when new requirements appear on the part of the customer, they cause an unjustified increase in the cost of the work.
First, let`s access the advantages of TypeScript:
- Errors made during code modification are visible immediately, not at runtime.
- TypeScript has interfaces and classes.
- It was created by Anders Hejlsberg, who also developed C#, Turbo Pascal, and Delphi.
- It has open-source code available on GitHub.
- TypeScript makes it faster and easier to write complex solutions that are easier to develop and test later.
- TypeScript has a high compilation speed and is distributed under the Apache license.
TypeScript adds strict typing to the language. Each variable at creation is assigned a certain type - a standard or created by the developer. The developer can create a type within the limits of the language: for example, a number from 1 to 31 to record a day in a month or an array of two elements to record coordinates.
What is "a variable is assigned a type"? This means it can only accept values within that type throughout the script. A variable set as a number will only be a number. The program will generate an error if the developer tries to assign it a string value.
The object-oriented paradigm
The OOP treats the information it deals with as classes and objects. An object is a complex instance of data, and a class is the "blueprint" from which objects are created. An object has a class, just as a variable has a type.
TypeScript supports three modifiers:
- Public - elements with this modifier are accessible from anywhere without any restrictions. This modifier is set by default.
- Private - elements with this modifier are only available from the class where they are defined.
- Protected - elements with this modifier are available from the class in which they are defined and in subclasses/derived classes.
TypeScript adds many OOP features to JS: access modifiers, abstract classes, and other features of the paradigm.
High project speed
Where is TypeScript most often used?
MaybeWorks expertise in TypeScript
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