fix: improve slots option (#813)

packages/create-instance/create-functional-component.js

@@ -2,7 +2,7 @@
 
 import { throwError } from 'shared/util'
 import { validateSlots } from './validate-slots'
-import { createSlotVNodes } from './add-slots'
+import { createSlotVNodes } from './create-slot-vnodes'
 
 export default function createFunctionalComponent (
   component: Component,
@@ -25,7 +25,7 @@ export default function createFunctionalComponent (
           mountingOptions.context.children.map(
             x => (typeof x === 'function' ? x(h) : x)
           )) ||
-          createSlotVNodes(h, mountingOptions.slots || {})
+          createSlotVNodes(this, mountingOptions.slots || {})
       )
     },
     name: component.name,

packages/create-instance/create-instance.js

@@ -1,6 +1,6 @@
 // @flow
 
-import { createSlotVNodes } from './add-slots'
+import { createSlotVNodes } from './create-slot-vnodes'
 import addMocks from './add-mocks'
 import { addEventLogger } from './log-events'
 import { createComponentStubs } from 'shared/stub-components'
@@ -12,6 +12,17 @@ import { componentNeedsCompiling } from 'shared/validators'
 import { validateSlots } from './validate-slots'
 import createScopedSlots from './create-scoped-slots'
 
+function compileTemplateForSlots (slots: Object): void {
+  Object.keys(slots).forEach(key => {
+    const slot = Array.isArray(slots[key]) ? slots[key] : [slots[key]]
+    slot.forEach(slotValue => {
+      if (componentNeedsCompiling(slotValue)) {
+        compileTemplate(slotValue)
+      }
+    })
+  })
+}
+
 export default function createInstance (
   component: Component,
   options: Options,
@@ -109,6 +120,8 @@ export default function createInstance (
   })
 
   if (options.slots) {
+    compileTemplateForSlots(options.slots)
+    // $FlowIgnore
     validateSlots(options.slots)
   }
 
@@ -129,7 +142,7 @@ export default function createInstance (
     provide: options.provide,
     render (h) {
       const slots = options.slots
-        ? createSlotVNodes(h, options.slots)
+        ? createSlotVNodes(this, options.slots)
         : undefined
       return h(
         Constructor,

packages/create-instance/create-slot-vnodes.js

@@ -0,0 +1,56 @@
+// @flow
+
+import { compileToFunctions } from 'vue-template-compiler'
+
+function createVNodes (
+  vm: Component,
+  slotValue: string
+): Array<VNode> {
+  const el = compileToFunctions(`<div>${slotValue}</div>`)
+  const _staticRenderFns = vm._renderProxy.$options.staticRenderFns
+  // version < 2.5
+  if (!vm._renderProxy._staticTrees) {
+    vm._renderProxy._staticTrees = []
+  }
+  vm._renderProxy.$options.staticRenderFns = el.staticRenderFns
+  const vnode = el.render.call(vm._renderProxy, vm.$createElement)
+  vm._renderProxy.$options.staticRenderFns = _staticRenderFns
+  return vnode.children
+}
+
+function createVNodesForSlot (
+  vm: Component,
+  slotValue: SlotValue,
+  name: string,
+): VNode | string {
+  let vnode
+  if (typeof slotValue === 'string') {
+    const vnodes = createVNodes(vm, slotValue)
+    vnode = vnodes[0]
+  } else {
+    vnode = vm.$createElement(slotValue)
+  }
+  if (vnode.data) {
+    vnode.data.slot = name
+  } else {
+    vnode.data = { slot: name }
+  }
+  return vnode
+}
+
+export function createSlotVNodes (
+  vm: Component,
+  slots: SlotsObject
+): Array<VNode | string> {
+  return Object.keys(slots).reduce((acc, key) => {
+    const content = slots[key]
+    if (Array.isArray(content)) {
+      const nodes = content.map(
+        slotDef => createVNodesForSlot(vm, slotDef, key)
+      )
+      return acc.concat(nodes)
+    }
+
+    return acc.concat(createVNodesForSlot(vm, content, key))
+  }, [])
+}

test/resources/components/component-with-parent-name.vue

@@ -0,0 +1,18 @@
+<template>
+  <div><span baz="qux">{{ fromLocalVue }},{{ bar }}</span></div>
+</template>
+
+<script>
+  export default{
+    name: 'component-with-parent-name',
+    props: ['fromLocalVue'],
+    data () {
+      return {
+        bar: 'quux'
+      }
+    },
+    mounted () {
+      this.$parent.childComponentName = this.$options.name
+    }
+  }
+</script>

test/specs/mounting-options/slots.spec.js

@@ -2,8 +2,10 @@ import { compileToFunctions } from 'vue-template-compiler'
 import Component from '~resources/components/component.vue'
 import ComponentWithSlots from '~resources/components/component-with-slots.vue'
 import ComponentAsAClass from '~resources/components/component-as-a-class.vue'
+import ComponentWithParentName from '~resources/components/component-with-parent-name.vue'
 import { describeWithMountingMethods, vueVersion } from '~resources/utils'
 import { itSkipIf, itDoNotRunIf } from 'conditional-specs'
+import { mount, createLocalVue } from '~vue/test-utils'
 
 describeWithMountingMethods('options.slots', mountingMethod => {
   it('mounts component with default slot if passed component in slot object', () => {
@@ -221,7 +223,7 @@ describeWithMountingMethods('options.slots', mountingMethod => {
     }
   })
 
-  it('mounts component with text slot', () => {
+  it('mounts component with default and named text slot', () => {
     const wrapper = mountingMethod(ComponentWithSlots, {
       slots: {
         default: 'hello,',
@@ -235,6 +237,24 @@ describeWithMountingMethods('options.slots', mountingMethod => {
     }
   })
 
+  it('mounts functional component with only named text slot', () => {
+    const TestComponent = {
+      name: 'component-with-slots',
+      functional: true,
+      render: (h, ctx) => h('div', ctx.data, [ctx.slots().default, ctx.slots().footer])
+    }
+    const wrapper = mountingMethod(TestComponent, {
+      slots: {
+        footer: 'foo'
+      }
+    })
+    if (mountingMethod.name === 'renderToString') {
+      expect(wrapper).contains('foo')
+    } else {
+      expect(wrapper.text()).to.equal('foo')
+    }
+  })
+
   it('mounts functional component with text slot', () => {
     const TestComponent = {
       name: 'component-with-slots',
@@ -568,4 +588,68 @@ describeWithMountingMethods('options.slots', mountingMethod => {
       expect(wrapper.contains(ComponentAsAClass)).to.equal(true)
     }
   })
+
+  itDoNotRunIf(
+    mountingMethod.name === 'renderToString',
+    'sets a component which can access the parent component and the child component',
+    () => {
+      const childComponentName = 'component-with-parent-name'
+      const localVue = createLocalVue()
+      localVue.prototype.bar = 'FOO'
+      let ParentComponent = mount(
+        {
+          name: 'parentComponent',
+          template: '<div><slot /></div>',
+          data () {
+            return {
+              childComponentName: ''
+            }
+          }
+        },
+        {
+          components: {
+            ComponentWithParentName
+          },
+          slots: {
+            default: [
+              '<component-with-parent-name :fromLocalVue="bar" />',
+              '<component-with-parent-name :fromLocalVue="bar" />'
+            ]
+          },
+          localVue
+        }
+      )
+      expect(ParentComponent.vm.childComponentName).to.equal(childComponentName)
+      expect(ParentComponent.vm.$children.length).to.equal(2)
+      expect(ParentComponent.vm.$children.every(c => c.$options.name === childComponentName)).to.equal(true)
+      expect(ParentComponent.html()).to.equal('<div><div><span baz="qux">FOO,quux</span></div><div><span baz="qux">FOO,quux</span></div></div>')
+
+      ParentComponent = mount(
+        {
+          name: 'parentComponent',
+          template: '<div><slot /></div>',
+          data () {
+            return {
+              childComponentName: ''
+            }
+          }
+        },
+        {
+          slots: {
+            default: {
+              name: childComponentName,
+              template: '<p>1234</p>',
+              mounted () {
+                this.$parent.childComponentName = this.$options.name
+              }
+            }
+          }
+        }
+      )
+      expect(ParentComponent.vm.childComponentName).to.equal(childComponentName)
+      expect(ParentComponent.vm.$children.length).to.equal(1)
+      expect(ParentComponent.vm.$children.every(c => c.$options.name === childComponentName)).to.equal(true)
+      expect(ParentComponent.html()).to.equal('<div><p>1234</p></div>')
+    }
+  )
 })