Cast int to enum strings in Typescript

Question

I get from a RESTful Service the following data:

[
  {
    \"id\": 42,
    \"type\": 0,
    \"name\": \"Piety was here\",
    \"description\": \"Bacon is tas         


        

Answer 1

I think with

{{message.type}}

you just get the mapped value and not the enum. Please try following code.

{{TYPE[message.type]}}

Answer 2

Enums in TypeScript are objects at runtime that have properties that go from int -> string and from string -> int for all possible values.

To access the string value you will need to call:

Type[0] // "Info"

Make sure that you are passing the correct type into the property accessor though because chained calls can result in the following:

Type[Type.Info] // "Info"
Type[Type[Type.Info]] // 0
Type["Info"] // 0
Type[0] // "Info"

Answer 3

Enums in TypeScript are numbers at runtime, so message.type will be 0, 1, 2 or 3.

To get the string value, you need to pass that number into the enum as an index:

Type[0] // "Info"

So, in your example, you'll need to do this:

Type[message.type] // "Info" when message.type is 0

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