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**What kind of change does this PR introduce?** Better type inference. **Did you add tests for your changes?** ~Not yet.~ Yes. **If relevant, did you update the documentation?** Not yet. **Summary** <!-- Explain the **motivation** for making this change. What existing problem does the pull request solve? --> <!-- Try to link to an open issue for more information. --> Currently methods that return an element handle, i.e. `.$`, `.waitForSelector` attempt to infer the node element type from the selector string. However, this only works when the selector is an exact match of the element tag, i.e. a selector `"a"` would be inferred as `HTMLAnchorElement` . And not when the selector is complex, i.e. selectors `"a#some-id"`, `div > a`, `a:nth-child(2)` would all fallback on `Element`. This is due to simply looking up the the selector in `HTMLElementTagNameMap` and `SVGElementTagNameMap` without any attempt to parse the selector string. This PR is an attempt to do so. **Does this PR introduce a breaking change?** <!-- If this PR introduces a breaking change, please describe the impact and a migration path for existing applications. --> This could break existing incorrect assertions using the `as` keyword. **Other information** ~This PR introduces a dependency on the `type-fest` package.~ This PR is far from complete (no tests, no docs). Put out early for feedback and discussion. Co-authored-by: Alex Rudenko <OrKoN@users.noreply.github.com>
19 lines
448 B
Markdown
19 lines
448 B
Markdown
---
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sidebar_label: NodeFor
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---
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# NodeFor type
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#### Signature:
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```typescript
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export declare type NodeFor<ComplexSelector extends string> =
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TypeSelectorOfComplexSelector<ComplexSelector> extends infer TypeSelector
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? TypeSelector extends keyof HTMLElementTagNameMap
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? HTMLElementTagNameMap[TypeSelector]
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: TypeSelector extends keyof SVGElementTagNameMap
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? SVGElementTagNameMap[TypeSelector]
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: Element
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: never;
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```
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