Skip to content

Update Object Types.md #3004

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Jake Bailey (jakebailey) merged 2 commits into from
Jun 5, 2024
Merged

Update Object Types.md #3004

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
8aaf61e
Udate Object Types.md
oh2o Dec 25, 2023
30d3e46
Fix typo
oh2o Dec 25, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions packages/documentation/copy/en/handbook-v2/Object Types.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -274,8 +274,8 @@ This index signature states that when a `StringArray` is indexed with a `number`
Only some types are allowed for index signature properties: `string`, `number`, `symbol`, template string patterns, and union types consisting only of these.

<details>
<summary>It is possible to support both types of indexers...</summary>
<p>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 <code>number</code>, JavaScript will actually convert that to a <code>string</code> before indexing into an object. That means that indexing with <code>100</code> (a <code>number</code>) is the same thing as indexing with <code>"100"</code> (a <code>string</code>), so the two need to be consistent.</p>
<summary>It is possible to support multiple types of indexers...</summary>
<p>It is possible to support multiple types of indexers. Note that when using both `number` and `string` indexers, 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 <code>number</code>, JavaScript will actually convert that to a <code>string</code> before indexing into an object. That means that indexing with <code>100</code> (a <code>number</code>) is the same thing as indexing with <code>"100"</code> (a <code>string</code>), so the two need to be consistent.</p>

```ts twoslash
// @errors: 2413
Expand Down