What is TypeScript?
One of the key uses of TypeScript is its ability to help enforce type safety. This trait helps cut errors caused by mismatches between variables and values. Imagine you have a variable called "name," and you try to assign it the value "Alice." But, by accident, you give it a value of "12" instead. In standard JS, this would cause no errors until runtime. Yet, with TypeScript, you'd see an error because the variable "name" is expecting a string value, and "12" is not. You can also see errors when trying to access the value of a property that doesn't exist inside an object.
TypeScript also offers optional static typing, which can provide further type safety benefits. Static typing allows you to declare the type of a variable when first defining it. Then, the compiler will check that all references to that variable are of the correct type. This typing avoids issues if code parts use different versions of variables or types.
Pros and Cons of TypeScript
Pros of TypeScript
● Its type-safety helps you prevent errors before runtime.
● Its enhanced readability is vital for early bug detection and defined types.
● Optional static typing makes it an ideal choice for large-scale dev projects.
● TypeScript has a complete set of libraries that eases the work with complex data structures.
● Visual Studio Code offers features like Predictive Assistance and IntelliSense for TypeScript.
● Among its new features, there's improved API documentation and type annotation.
Cons of TypeScript
● Its additional syntax and rules might be cumbersome and lead to more errors.
● Files tend to be larger than their equal JS files due to the extra type of information included.
● It can take some time to get up to it if you're not used to Object Oriented Programming.
How To Get Started With TypeScript?
If you're looking to start with TypeScript, there are only a few steps you need to take! The first is to install Node.js, as TypeScript is a Node.js program. You can find the installation instructions on the Node.js website.
Once you have Node.js, you can install TypeScript by running the npm install -g typescript command. With TypeScript installed, you're ready to start coding! You can create a new project by running the following declaration: tsc –init. This command will create a new folder called "tsc-init," and inside it, you'll find a file called "tsconfig.json." This step is where you'll configure your project's settings.
You can also specify which modules you want to include in your project. You'll have to add them to the "modules" property. For example, if you use the React library, you should add "react" to this property. There are many other settings that you can configure in this file. For instance, the type of compiler warnings you want to enable. Also, you can set up whether you wish TypeScript to check for type errors while you're coding.
1. Large Projects. TypeScript often focuses on larger projects with a more structured codebase. It can help prevent errors and makes code easier to read and maintain.
2. Focus on Speed. If you need reusable modules and speed is a priority, TypeScript can be a great option. Its error warnings feature will prevent teams from spending hours debugging code.
3. Static Typing. Some projects might need static typing. Often, this procedure ensures performance without having to run too many tests. If a project is prone to need refactoring, it will be much easier to do due to the static typing of TypeScript.