TypeScript is a subset of JavaScript.
To set a new property on the window object in TypeScript, you can extend the Window interface or use the index notation. Method 1: Extend the Window interface You can create a new TypeScript module and extend the Window interface by adding the new property. This way, TypeScript will be aware of the property, and … Read more
The exclamation mark(!) is a non-null assertion operator. It is a postfix expression that informs TypeScript that the preceding expression is not null or undefined. By using the ! operator, you’re telling TypeScript to trust that the value is present, and it should not raise a type error. It’s a way of overriding TypeScript’s strict … Read more
To convert a string to a number in TypeScript, you can use the “Number() constructor”, “parseFloat()/parseInt() function“, or “unary + operator”. Method 1: Using the Number() constructor The Number() constructor function takes a value as input and attempts to convert it to a number. If the conversion is successful, it returns the number. If the … Read more
TypeScript error TS2304: “cannot find name ‘require’” occurs when you try to use the require() function, which is a part of the CommonJS module system, but TypeScript is unaware of it. To fix this issue, you need to follow these steps: Step 1: Install the Node.js type definitions You can install the type definitions for … Read more
To get the names of enum entries in TypeScript, you can use the Object.keys() function. Example Define an enum. enum MyEnum { ValueA = “VALUE_A”, ValueB = “VALUE_B”, ValueC = “VALUE_C”, } Get the names of Enum entries using the Object.keys() function. enum MyEnum { KEY_A = “VALUE_A”, KEY_B = “VALUE_B”, KEY_C = “VALUE_C”, } … Read more
You can use generics with arrow functions by specifying the generic type parameters between angle brackets (< and >) right before the function’s argument list in TypeScript. Syntax const arrowFunction = <GenericType>(arg: GenericType): ReturnType => { // Function body }; Example // Arrow function with a generic type T const identity = <T>(value: T): T … Read more
A tsconfig.json file is a configuration file for TypeScript projects. It specifies the root files and the compiler options required to compile the project. The tsconfig.json file is typically placed in the root directory of a TypeScript project. It can also be placed in a subfolder of the project. It contains a set of properties … Read more