fix(compiler-vapor): properly locate last if node (#13399)

packages/compiler-vapor/__tests__/transforms/__snapshots__/vIf.spec.ts.snap

@@ -134,3 +134,29 @@ export function render(_ctx) {
   return n0
 }"
 `;
+
+exports[`compiler: v-if > v-if + v-if / v-else[-if] 1`] = `
+"import { setInsertionState as _setInsertionState, createIf as _createIf, template as _template } from 'vue';
+const t0 = _template("<span>foo</span>")
+const t1 = _template("<span>bar</span>")
+const t2 = _template("<span>baz</span>")
+const t3 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const n8 = t3()
+  _setInsertionState(n8)
+  const n0 = _createIf(() => (_ctx.foo), () => {
+    const n2 = t0()
+    return n2
+  })
+  _setInsertionState(n8)
+  const n3 = _createIf(() => (_ctx.bar), () => {
+    const n5 = t1()
+    return n5
+  }, () => {
+    const n7 = t2()
+    return n7
+  })
+  return n8
+}"
+`;

packages/compiler-vapor/__tests__/transforms/__snapshots__/vSlot.spec.ts.snap

@@ -252,3 +252,25 @@ export function render(_ctx) {
   return n1
 }"
 `;
+
+exports[`compiler: transform slot > slot + v-if / v-else[-if] should not cause error 1`] = `
+"import { resolveComponent as _resolveComponent, setInsertionState as _setInsertionState, createSlot as _createSlot, createComponentWithFallback as _createComponentWithFallback, createIf as _createIf, template as _template } from 'vue';
+const t0 = _template("<div></div>", true)
+
+export function render(_ctx) {
+  const _component_Foo = _resolveComponent("Foo")
+  const _component_Bar = _resolveComponent("Bar")
+  const n6 = t0()
+  _setInsertionState(n6)
+  const n0 = _createSlot("foo", null)
+  _setInsertionState(n6)
+  const n1 = _createIf(() => (true), () => {
+    const n3 = _createComponentWithFallback(_component_Foo)
+    return n3
+  }, () => {
+    const n5 = _createComponentWithFallback(_component_Bar)
+    return n5
+  })
+  return n6
+}"
+`;

packages/compiler-vapor/__tests__/transforms/vIf.spec.ts

@@ -215,6 +215,17 @@ describe('compiler: v-if', () => {
     })
   })
 
+  test('v-if + v-if / v-else[-if]', () => {
+    const { code } = compileWithVIf(
+      `<div>
+        <span v-if="foo">foo</span>
+        <span v-if="bar">bar</span>
+        <span v-else>baz</span>
+      </div>`,
+    )
+    expect(code).toMatchSnapshot()
+  })
+
   test('comment between branches', () => {
     const { code, ir } = compileWithVIf(`
       <div v-if="ok"/>

packages/compiler-vapor/__tests__/transforms/vSlot.spec.ts

@@ -371,6 +371,17 @@ describe('compiler: transform slot', () => {
     })
   })
 
+  test('slot + v-if / v-else[-if] should not cause error', () => {
+    const { code } = compileWithSlots(
+      `<div>
+        <slot name="foo"></slot>
+        <Foo v-if="true"></Foo>
+        <Bar v-else />
+      </div>`,
+    )
+    expect(code).toMatchSnapshot()
+  })
+
   test('quote slot name', () => {
     const { code } = compileWithSlots(
       `<Comp><template #nav-bar-title-before></template></Comp>`,

packages/compiler-vapor/src/transforms/vIf.ts

@@ -65,7 +65,13 @@ export function processIf(
     if (siblings) {
       let i = siblings.length
       while (i--) {
-        if (siblings[i].operation) lastIfNode = siblings[i].operation
+        if (
+          siblings[i].operation &&
+          siblings[i].operation!.type === IRNodeTypes.IF
+        ) {
+          lastIfNode = siblings[i].operation
+          break
+        }
       }
     }