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Series
In this series, You'll see some tips and tricks using Typescript
Hi guy and welcome back :) Today I'll talk about the Rest Parameters and the Rest Arguments. Sometimes we need to write a simple code like this: function multiply(a: number, b: number): number { return a * b; } const result1 = multiply(2, 2); // 4...
Hi Guys, Today I'll show you some advanced utilities exposed by the typescript language. Let's start! Utilities for Types Partial This utility allows you to add the optional modifier to all the properties of your type. type PartialPoint = Partial<{...
In some cases, we need to manipulate some types to create new types. In these cases, we have to use the Mapped Types. Let's start explaining the structure of the mapped types. type MappedTypeExample = { [Key in "x" | "y" | "z"]: number; }; As yo...
Today I talk about the infer keyword. Sometimes, we need to get the value type of an array or get the return type of a function. To do this I need to introduce the infer keyword. To explain this feature I show you an example type UnboxingArray<T> = T...
In some cases, we need to detect if an object/type has specific properties or characteristics. Let me show you a simple case type TypeName<T> = T extends string ? "string" : T extends number ? "number" : T extends bigint ? "bigint" : ...
There are some cases, where we need to detect the type of the object to get the correct implementation of our method. Let me show you a case type Square = { size: number; }; type Rectangle = { with: number; height: number; }; type Circle = { ...
