Mimic browser select on focus when navigating via Tab (#1272)

* mimic browser select on focus

When calling focusIn if the next node is selectable select all the text.

* refactor browser `select` behaviour for React and Vue

* update changelog

Co-authored-by: Robin Malfait <malfait.robin@gmail.com>

CHANGELOG.md

@@ -32,6 +32,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix incorrect `active` option in the Listbox/Combobox component ([#1264](https://github.com/tailwindlabs/headlessui/pull/1264))
 - Properly merge incoming props ([#1265](https://github.com/tailwindlabs/headlessui/pull/1265))
 - Fix incorrect closing while interacting with third party libraries in `Dialog` component ([#1268](https://github.com/tailwindlabs/headlessui/pull/1268))
+- Mimic browser select on focus when navigating via `Tab` ([#1272](https://github.com/tailwindlabs/headlessui/pull/1272))
 
 ### Added
 
@@ -65,6 +66,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix Tree-shaking support ([#1247](https://github.com/tailwindlabs/headlessui/pull/1247))
 - Stop propagation on the Popover Button ([#1263](https://github.com/tailwindlabs/headlessui/pull/1263))
 - Fix incorrect closing while interacting with third party libraries in `Dialog` component ([#1268](https://github.com/tailwindlabs/headlessui/pull/1268))
+- Mimic browser select on focus when navigating via `Tab` ([#1272](https://github.com/tailwindlabs/headlessui/pull/1272))
 - Resolve `initialFocusRef` correctly ([#1276](https://github.com/tailwindlabs/headlessui/pull/1276))
 
 ### Added

packages/@headlessui-react/src/utils/focus-management.ts

@@ -103,6 +103,14 @@ export function focusElement(element: HTMLElement | null) {
   element?.focus({ preventScroll: true })
 }
 
+// https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/select
+let selectableSelector = ['textarea', 'input'].join(',')
+function isSelectableElement(
+  element: Element | null
+): element is HTMLInputElement | HTMLTextAreaElement {
+  return element?.matches?.(selectableSelector) ?? false
+}
+
 export function sortByDomNode<T>(
   nodes: T[],
   resolveKey: (item: T) => HTMLElement | null = (i) => i as unknown as HTMLElement | null
@@ -176,6 +184,18 @@ export function focusIn(container: HTMLElement | HTMLElement[], focus: Focus) {
     offset += direction
   } while (next !== ownerDocument.activeElement)
 
+  // By default if you <Tab> to a text input or a textarea, the browser will
+  // select all the text once the focus is inside these DOM Nodes. However,
+  // since we are manually moving focus this behaviour is not happening. This
+  // code will make sure that the text gets selected as-if you did it manually.
+  // Note: We only do this when going forward / backward. Not for the
+  // Focus.First or Focus.Last actions. This is similar to the `autoFocus`
+  // behaviour on an input where the input will get focus but won't be
+  // selected.
+  if (focus & (Focus.Next | Focus.Previous) && isSelectableElement(next)) {
+    next.select()
+  }
+
   // This is a little weird, but let me try and explain: There are a few scenario's
   // in chrome for example where a focused `<a>` tag does not get the default focus
   // styles and sometimes they do. This highly depends on whether you started by

packages/@headlessui-vue/src/utils/focus-management.ts

@@ -96,6 +96,14 @@ export function focusElement(element: HTMLElement | null) {
   element?.focus({ preventScroll: true })
 }
 
+// https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/select
+let selectableSelector = ['textarea', 'input'].join(',')
+function isSelectableElement(
+  element: Element | null
+): element is HTMLInputElement | HTMLTextAreaElement {
+  return element?.matches?.(selectableSelector) ?? false
+}
+
 export function sortByDomNode<T>(
   nodes: T[],
   resolveKey: (item: T) => HTMLElement | null = (i) => i as unknown as HTMLElement | null
@@ -179,5 +187,17 @@ export function focusIn(container: HTMLElement | HTMLElement[], focus: Focus) {
   // also add this tabindex.
   if (!next.hasAttribute('tabindex')) next.setAttribute('tabindex', '0')
 
+  // By default if you <Tab> to a text input or a textarea, the browser will
+  // select all the text once the focus is inside these DOM Nodes. However,
+  // since we are manually moving focus this behaviour is not happening. This
+  // code will make sure that the text gets selected as-if you did it manually.
+  // Note: We only do this when going forward / backward. Not for the
+  // Focus.First or Focus.Last actions. This is similar to the `autoFocus`
+  // behaviour on an input where the input will get focus but won't be
+  // selected.
+  if (focus & (Focus.Next | Focus.Previous) && isSelectableElement(next)) {
+    next.select()
+  }
+
   return FocusResult.Success
 }