CODEWITHSUNDEEP
typescripttypescript-typings
mbehzad
mbehzad

Reputation: 3878

Define Index types with a specific pattern for typescript

is there a way to define Index types for typescript with a specific pattern? something like all properties starting with "$" are HTMLElements. something like

[key: "^\$.+"]: HTMLElement;

Upvotes: 0

Views: 105

Answers (1)

DAG
DAG

Reputation: 6994

No, this is currently not possible, index signatures are limited to the following:

There are two types of supported index signatures: string and number. It is possible to support both types of indexers, but the type returned from a numeric indexer must be a subtype of the type returned from the string indexer. This is because when indexing with a number, JavaScript will actually convert that to a string before indexing into an object.

There are some proposals for allowing exactly what you described, but no significant effort for an implementation has happend yet.

Upvotes: 1

Related Questions