🗒️Typescript-interface&object

2023-5-2|2023-5-2
Anthony
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In TypeScript, an interface is a blueprint for a type. It defines the shape of an object, including its properties and methods. Interfaces are used to provide type safety and to ensure that code is consistent.
 
  • For example, to define a person, we can say
 
  • The properties for the interfaces that have the same name will be merged together
 
  • Imagine that there are a bunch of data with various properties like name, age, sexual, hobby, ID, job, etc, returned from your annoying backend, but you just need a few of them. We can use a method called “index signature”. Now, you should just make sure your person have the properties that are directly marked.
 
  • you can make a property nullable by simply adding a “?” to it
  • Or, you can make a property “read only” by simply adding readonly before it.
 
 
  • You can also use “extends” in Typescript, just the same as C++
  • The interface could be also used to restrict a function parameters and return values
前端
typescript和getelementByID的配合使用Typescript-Symbol()