"IndexSignature not supported" error and Object.keys() not working

[Sarge]

Unfortunately, makecode uses static typescript, which does not support the behaviour you’re trying to accomplish.

Object.keys(x) is not yet supported when x is dynamically a class type. It is supported when x was created with an object literal (eg., {} or { a: 1, b: "foo" }). The order in which properties are returned is order of insertion with no special regard for keys that looks like integer (JavaScript has really counter-intuitive behavior here). When we support Object.keys() on class types, the order will be the static order of field definition.

I asked something like this a while back, same outcome

How do I get names from objects instantiated from a class?

Basicaly, writing up an object with properties and fetching its keys with Object.keys() works fine. let foo = { bar: "abc", baz: () => {} } // Logs "bar", "baz" console.log(Object.keys(foo)); However, getting keys from a class instance just yields an empty array class Foo { bar: number; baz() { // code goes here } } // Expecting "bar", "baz" // Output is empty console.log(Object.keys(new Foo())); Why is this the case? Is there a way to achieve what I’m trying to…