TypeScript is a language that enables writing better code for large and complex projects. Explore What TypeScript is and its types through this blog.
TypeScript is a superset of JavaScript that adds optional static typing and advanced features to JavaScript. It was developed by Microsoft and was initially released in October 2012. Since its release in 2012, it has rapidly gained widespread adoption in the web development community....
Fast forward to 2024, TypeScript is at version 5.5. It also remains relevant to JavaScript and proceeds with its mission to offer effective tools for working with JavaScript. Today, TypeScript is an example of how static typing works in a dynamically typed language. Recommended reading: Best J...
JavaScript functions can also be called using the new operator. TypeScript refers to these as constructors because they usually create a new object. You can write the construction signature by adding the new keyword before the call signature: type SomeConstructor = { new (s: string): SomeObjec...
What is a declaration file in TypeScript? In TypeScript, a declaration file (with a .d.ts extension) is used to provide type information for existing JavaScript libraries or modules that do not have built-in TypeScript support. It declares the structure and types of the external code, enabl...
When used together, "keyof typeof" can be used to get the property names of an object in TypeScript, where: "typeof" operator works on a JavaScript value (such as a variable, constant, parameter, function, class declaration, or enum) to infer the type of the value, and; "keyof" ...
What is symbol in TypeScript? symbol isa primitive data type in JavaScriptand TypeScript, which, amongst other things, can be used for object properties. Compared to number and string , symbol s have some unique features that make them stand out. ...
As a breaking change, the type of top-level this is now typed as typeof globalThis instead of any. As a consequence, developers might receive errors for accessing unknown values on this and noImplicitAny. Another breaking change is that improved inference in TypeScript 3.4 might produce generic...
Learn what is Vue JS, a powerful and easy-to-learn JavaScript framework for building user interfaces and single-page applications. Read more in this blog.
Perspective 2: type compatibility relationships# From this perspective, we are not concerned with values and how they flow when code is executed. Instead, we take a more static view: Source code has locations and each location has a static type. In a TypeScript-aware editor, we can see th...