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Editor to share with you how to achieve type assertion typescript, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

Type assertion

Type assertions are used to explicitly tell the detailed type of the typescript value, and reasonable use can reduce our workload.

For example, a variable does not have an initial value, but we know its type information (it may be returned from the back end). Is there any way to derive the type information correctly and work properly? One way to recommend it online is to set the initial value and then use typeof to get the type (which may be used elsewhere). You can also use type assertions to solve such problems:

Interface User {name: string; age: number;} export default class someClass {private user = {} as User;} these are all the contents of the article "how typescript implements type assertions". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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