[TypeScript] Catch unsafe use of "this" in TypeScript functions

【[TypeScript] Catch unsafe use of "this" in TypeScript functions】的更多相关文章

[TypeScript] Catch unsafe use of "this" in TypeScript functions

this is probably the most tricky thing to use in JavaScript and therefore TypeScript. Fortunately there is a TypeScript compiler flag noImplicit this that can help catch unsafe usages so beginners don't get caught off guard. // tsconfig.json { "compi…

[TypeScript] Using Interfaces to Describe Types in TypeScript

It’s easy to pass the wrong value to a function. Typescript interfaces are great because they catch errors at compile time or in an IDE. In this lesson we’ll learn how to describe a type shape with Typescript interfaces. Using interface to describe a…

[TypeScript] Distinguishing between types of Strings in TypeScript

In JavaScript, many libraries use string arguments to change behavior. In this lesson we learn how Typescript catches string related errors at compile time by assigning a string literal as a type. type whiteList = "DOG" | "CAT" | "…

[TypeScript] Union Types and Type Aliases in TypeScript

Sometimes we want our function arguments to be able to accept more than 1 type; e.g. a string or an array. This lesson will show us how to assign more than 1 type to a variable with Typescript union types and type aliases. type types = string | boole…

[TypeScript] Using Assertion to Convert Types in TypeScript

Sometimes the compiler needs help figuring out a type. In this lesson we learn how to help out the compiler with Typescript type assertion. We have a SuperHero and a BadGuy. Let's make a function that saves the day if the function's argument is a Sup…

[TypeScript] Sharing Class Behavior with Inheritance in TypeScript

Typescript classes make inheritance much easier to write and understand. In this lesson we look into how to set up inheritance with Typescript classes, extends and super. class ComicBookCharacter ( constructor{ public alias: string, public health: nu…