Add text node support to FragmentInstance operations#35630
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jackpope merged 1 commit intofacebook:mainfrom Jan 28, 2026
Merged
Add text node support to FragmentInstance operations#35630jackpope merged 1 commit intofacebook:mainfrom
jackpope merged 1 commit intofacebook:mainfrom
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| return false; | ||
| }); | ||
| if (hasText && !hasElement) { | ||
| console.warn( |
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Shouldn't this be console.error?
| while (i !== (resolvedAlignToTop ? -1 : children.length)) { | ||
| const child = children[i]; | ||
| // For text nodes, use Range API to scroll to their position | ||
| if (enableFragmentRefsTextNodes && child.tag === HostText) { |
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We usually gate with just the flag
if (enableFragmentRefsTextNodes) {
if (child.tag === HostText) {
// ...
}
}
rickhanlonii
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This PR adds text node support to FragmentInstance operations, allowing fragment refs to properly handle fragments that contain text nodes (either mixed with elements or text-only). Not currently adding/removing new text nodes as we don't need to track them for events or observers in DOM. Will follow up on this and with Fabric support. ## Support through parent element - `dispatchEvent` - `compareDocumentPosition` - `getRootNode` ## Support through Range API - `getClientRects`: Uses Range to calculate bounding rects for text nodes - `scrollIntoView`: Uses Range to scroll to text node positions directly ## No support - `focus`/`focusLast`/`blur`: Noop for text-only fragments - `observeUsing`: Warns for text-only fragments in DEV - `addEventListener`/`removeEventListener`: Ignores text nodes, but still works on Fragment level through `dispatchEvent` DiffTrain build for [875b064](875b064)
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This PR adds text node support to FragmentInstance operations, allowing fragment refs to properly handle fragments that contain text nodes (either mixed with elements or text-only). Not currently adding/removing new text nodes as we don't need to track them for events or observers in DOM. Will follow up on this and with Fabric support. ## Support through parent element - `dispatchEvent` - `compareDocumentPosition` - `getRootNode` ## Support through Range API - `getClientRects`: Uses Range to calculate bounding rects for text nodes - `scrollIntoView`: Uses Range to scroll to text node positions directly ## No support - `focus`/`focusLast`/`blur`: Noop for text-only fragments - `observeUsing`: Warns for text-only fragments in DEV - `addEventListener`/`removeEventListener`: Ignores text nodes, but still works on Fragment level through `dispatchEvent` DiffTrain build for [875b064](875b064)
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Stacked on #35630 - Adds test case for compareDocumentPosition, missing before and also extending to text nodes - Adds event handling fixture case for text - Adds getRootNode fixture case for text
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Follow up to #35630 We don't currently have any operations that depend on the updating of text nodes added or removed after Fragment mount. But for the sake of completeness and extending the ability to any other host configs, this change calls `commitNewChildToFragmentInstance` and `deleteChildFromFragmentInstance` on HostText fibers. Both DOM and Fabric configs early return because we cannot attach event listeners or observers to text. In the future, there could be some stateful Fragment feature that uses text that could extend this.
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This PR adds text node support to FragmentInstance operations, allowing fragment refs to properly handle fragments that contain text nodes (either mixed with elements or text-only).
Not currently adding/removing new text nodes as we don't need to track them for events or observers in DOM. Will follow up on this and with Fabric support.
Support through parent element
dispatchEventcompareDocumentPositiongetRootNodeSupport through Range API
getClientRects: Uses Range to calculate bounding rects for text nodesscrollIntoView: Uses Range to scroll to text node positions directlyNo support
focus/focusLast/blur: Noop for text-only fragmentsobserveUsing: Warns for text-only fragments in DEVaddEventListener/removeEventListener: Ignores text nodes, but still works on Fragment level throughdispatchEvent