My intention was to test out some type settings on TypeScript playground at codepen.io, but I encountered an unexpected issue:
enum Order {
Asc = 'asc',
Desc = 'desc'
}
console.log(Order[Order.Asc]); // undefined in codepen.io playground
Usually, when compiled with webpack or other tools, it correctly displays "Asc".
Referencing information from https://www.typescriptlang.org/docs/handbook/enums.html#reverse-mappings
When an enum is compiled, it creates an object that holds mappings in both directions (name -> value and value -> name). [...]
It's important to note that string enum members do not have a reverse mapping generated.
The example below illustrates how reverse mapping functions with numbers:
enum Priority {
High,
Low
}
Priority.High // 0
Priority[Priority.High] // "High"
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