How can a TypeScript type be created with multiple specific guidelines?

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A TypeScript type can be created with multiple specific guidelines using intersection types. Intersection types allow you to combine multiple types into one, resulting in a new type that must adhere to all of the guidelines specified by the original types.

To create an intersection type, use the "&" symbol between the desired types. For example, if you want to create a type that represents a person with a name and an age, you can define it as follows:

type Person = {
  name: string;
} & {
  age: number;
}

In this example, the type "Person" is defined as an intersection of two types: the first one requires a "name" property that is a string, and the second one requires an "age" property that is a number. Any variable of type "Person" must have both properties to be considered valid.

You can use intersection types to combine as many types as you need, making them a powerful tool for defining complex types with specific guidelines.