fix(useForwardExpose): fix #1631

packages/radix-vue/src/shared/useForwardExpose.test.ts

@@ -0,0 +1,165 @@
+import { flushPromises, mount } from '@vue/test-utils'
+import { describe, expect, it } from 'vitest'
+import { Fragment, computed, defineComponent, h, ref } from 'vue'
+
+import { useForwardExpose } from './useForwardExpose'
+
+describe('useForwardRef', async () => {
+  it('should forward plain DOM element ref', async () => {
+    const comp = defineComponent({
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      template: `
+        <div>
+          <span :ref="forwardRef"> inner element </span>
+        </div>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+  it('should forward plain DOM element ref - 2', async () => {
+    const comp = defineComponent({
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      template: `
+        <div>
+          <span :ref="_=>forwardRef({$el: _})"> inner element </span>
+        </div>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+  it('should forward plain DOM element ref - fragment', async () => {
+    const comp = defineComponent({
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      template: `
+        <div>multiple node root</div>
+        <div>
+          <span :ref="forwardRef"> inner element </span>
+        </div>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+  it('should forward plain DOM element ref - fragment - 2', async () => {
+    const Frag = defineComponent(
+      (props, { slots }) =>
+        () =>
+          h(Fragment, {}, [slots.default?.()]),
+    )
+    const comp = defineComponent({
+      components: { Frag },
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      template: `
+        <Frag>
+          <Frag>
+            <div>
+              <span :ref="forwardRef"> inner element </span>
+            </div>
+          </Frag>
+        </Frag>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+  it('should forward plain DOM element ref - fragment - 3', async () => {
+    const comp = defineComponent({
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      template: `
+        <div>
+          <template>
+            <div>
+              <span :ref="forwardRef"> inner element </span>
+            </div>
+          </template>
+        </div>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+  it('should forward component instance for component', async () => {
+    const InnerComp = defineComponent(() => {
+      return () => h('span', {}, 'inner component')
+    })
+    const comp = defineComponent({
+      setup() {
+        const { forwardRef } = useForwardExpose()
+        return { forwardRef }
+      },
+      components: { InnerComp },
+      template: `
+        <div>
+          <InnerComp :ref="forwardRef" />
+        </div>
+      `,
+    })
+    const wrapper = mount(
+      defineComponent(() => {
+        const el = ref()
+        const forwardedRef = computed(() => el.value?.$el)
+        return () =>
+          h('div', { test: forwardedRef.value }, [h(comp, { ref: el })])
+      }),
+    )
+    await flushPromises()
+    expect(wrapper.attributes('test')).toBe('[object HTMLSpanElement]')
+  })
+})

packages/radix-vue/src/shared/useForwardExpose.ts

@@ -48,14 +48,14 @@ export function useForwardExpose() {
   function forwardRef(ref: Element | ComponentPublicInstance | null) {
     currentRef.value = ref
 
-    if (ref instanceof Element || !ref)
+    if (!ref)
       return
 
     // retrieve the forwarded element
     Object.defineProperty(ret, '$el', {
       enumerable: true,
       configurable: true,
-      get: () => ref.$el,
+      get: () => (ref instanceof Element ? ref : ref.$el),
     })
 
     instance.exposed = ret