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VNode,
normalizeVNode,
Text,
Comment,
Static,
Fragment,
VNodeHook,
createVNode,
createTextVNode,
invokeVNodeHook
} from './vnode'
import { flushPostFlushCbs } from './scheduler'
import { ComponentInternalInstance } from './component'
import { invokeDirectiveHook } from './directives'
import { warn } from './warning'
import { PatchFlags, ShapeFlags, isReservedProp, isOn } from '@vue/shared'
import { RendererInternals } from './renderer'
import { setRef } from './rendererTemplateRef'
import {
SuspenseImpl,
SuspenseBoundary,
queueEffectWithSuspense
} from './components/Suspense'
import { TeleportImpl, TeleportVNode } from './components/Teleport'
import { isAsyncWrapper } from './apiAsyncComponent'
export type RootHydrateFunction = (
vnode: VNode<Node, Element>,
container: (Element | ShadowRoot) & { _vnode?: VNode }
) => void
const enum DOMNodeTypes {
ELEMENT = 1,
TEXT = 3,
COMMENT = 8
}
let hasMismatch = false
const isSVGContainer = (container: Element) =>
/svg/.test(container.namespaceURI!) && container.tagName !== 'foreignObject'
const isComment = (node: Node): node is Comment =>
node.nodeType === DOMNodeTypes.COMMENT
// Note: hydration is DOM-specific
// But we have to place it in core due to tight coupling with core - splitting
// it out creates a ton of unnecessary complexity.
// Hydration also depends on some renderer internal logic which needs to be
// passed in via arguments.
export function createHydrationFunctions(
rendererInternals: RendererInternals<Node, Element>
) {
const {
mt: mountComponent,
p: patch,
o: {
patchProp,
createText,
nextSibling,
parentNode,
remove,
insert,
createComment
}
} = rendererInternals
const hydrate: RootHydrateFunction = (vnode, container) => {
Iif (!container.hasChildNodes()) {
__DEV__ &&
warn(
`Attempting to hydrate existing markup but container is empty. ` +
`Performing full mount instead.`
)
patch(null, vnode, container)
flushPostFlushCbs()
container._vnode = vnode
return
}
hasMismatch = false
hydrateNode(container.firstChild!, vnode, null, null, null)
flushPostFlushCbs()
container._vnode = vnode
Iif (hasMismatch && !__TEST__) {
// this error should show up in production
console.error(`Hydration completed but contains mismatches.`)
}
}
const hydrateNode = (
node: Node,
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized = false
): Node | null => {
const isFragmentStart = isComment(node) && node.data === '['
const onMismatch = () =>
handleMismatch(
node,
vnode,
parentComponent,
parentSuspense,
slotScopeIds,
isFragmentStart
)
const { type, ref, shapeFlag, patchFlag } = vnode
let domType = node.nodeType
vnode.el = node
if (patchFlag === PatchFlags.BAIL) {
optimized = false
vnode.dynamicChildren = null
}
let nextNode: Node | null = null
switch (type) {
case Text:
if (domType !== DOMNodeTypes.TEXT) {
// #5728 empty text node inside a slot can cause hydration failure
// because the server rendered HTML won't contain a text node
if (vnode.children === '') {
insert((vnode.el = createText('')), parentNode(node)!, node)
nextNode = node
} else E{
nextNode = onMismatch()
}
} else {
if ((node as Text).data !== vnode.children) {
hasMismatch = true
__DEV__ &&
warn(
`Hydration text mismatch:` +
`\n- Client: ${JSON.stringify((node as Text).data)}` +
`\n- Server: ${JSON.stringify(vnode.children)}`
)
;(node as Text).data = vnode.children as string
}
nextNode = nextSibling(node)
}
break
case Comment:
Iif (domType !== DOMNodeTypes.COMMENT || isFragmentStart) {
nextNode = onMismatch()
} else {
nextNode = nextSibling(node)
}
break
case Static:
if (isFragmentStart) {
// entire template is static but SSRed as a fragment
node = nextSibling(node)!
domType = node.nodeType
}
if (domType === DOMNodeTypes.ELEMENT || domType === DOMNodeTypes.TEXT) {
// determine anchor, adopt content
nextNode = node
// if the static vnode has its content stripped during build,
// adopt it from the server-rendered HTML.
const needToAdoptContent = !(vnode.children as string).length
for (let i = 0; i < vnode.staticCount!; i++) {
if (needToAdoptContent)
vnode.children +=
nextNode.nodeType === DOMNodeTypes.ELEMENT
? (nextNode as Element).outerHTML
: (nextNode as Text).data
if (i === vnode.staticCount! - 1) {
vnode.anchor = nextNode
}
nextNode = nextSibling(nextNode)!
}
return isFragmentStart ? nextSibling(nextNode) : nextNode
} else E{
onMismatch()
}
break
case Fragment:
Iif (!isFragmentStart) {
nextNode = onMismatch()
} else {
nextNode = hydrateFragment(
node as Comment,
vnode,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
}
break
default:
if (shapeFlag & ShapeFlags.ELEMENT) {
if (
domType !== DOMNodeTypes.ELEMENT ||
(vnode.type as string).toLowerCase() !==
(node as Element).tagName.toLowerCase()
) {
nextNode = onMismatch()
} else {
nextNode = hydrateElement(
node as Element,
vnode,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
}
} else if (shapeFlag & ShapeFlags.COMPONENT) {
// when setting up the render effect, if the initial vnode already
// has .el set, the component will perform hydration instead of mount
// on its sub-tree.
vnode.slotScopeIds = slotScopeIds
const container = parentNode(node)!
mountComponent(
vnode,
container,
null,
parentComponent,
parentSuspense,
isSVGContainer(container),
optimized
)
// component may be async, so in the case of fragments we cannot rely
// on component's rendered output to determine the end of the fragment
// instead, we do a lookahead to find the end anchor node.
nextNode = isFragmentStart
? locateClosingAsyncAnchor(node)
: nextSibling(node)
// #4293 teleport as component root
if (
nextNode &&
isComment(nextNode) &&
nextNode.data === 'teleport end'
) {
nextNode = nextSibling(nextNode)
}
// #3787
// if component is async, it may get moved / unmounted before its
// inner component is loaded, so we need to give it a placeholder
// vnode that matches its adopted DOM.
if (isAsyncWrapper(vnode)) {
let subTree
if (isFragmentStart) {
subTree = createVNode(Fragment)
subTree.anchor = nextNode
? nextNode.previousSibling
: container.lastChild
} else {
subTree =
node.nodeType === 3 ? createTextVNode('') : createVNode('div')
}
subTree.el = node
vnode.component!.subTree = subTree
}
} else if (shapeFlag & ShapeFlags.TELEPORT) {
Iif (domType !== DOMNodeTypes.COMMENT) {
nextNode = onMismatch()
} else {
nextNode = (vnode.type as typeof TeleportImpl).hydrate(
node,
vnode as TeleportVNode,
parentComponent,
parentSuspense,
slotScopeIds,
optimized,
rendererInternals,
hydrateChildren
)
}
} else if (__FEATURE_SUSPENSE__ && shapeFlag & ShapeFlags.SUSPENSE) {
nextNode = (vnode.type as typeof SuspenseImpl).hydrate(
node,
vnode,
parentComponent,
parentSuspense,
isSVGContainer(parentNode(node)!),
slotScopeIds,
optimized,
rendererInternals,
hydrateNode
)
} else IEif (__DEV__) {
warn('Invalid HostVNode type:', type, `(${typeof type})`)
}
}
if (ref != null) {
setRef(ref, null, parentSuspense, vnode)
}
return nextNode
}
const hydrateElement = (
el: Element,
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean
) => {
optimized = optimized || !!vnode.dynamicChildren
const { type, props, patchFlag, shapeFlag, dirs } = vnode
// #4006 for form elements with non-string v-model value bindings
// e.g. <option :value="obj">, <input type="checkbox" :true-value="1">
const forcePatchValue = (type === 'input' && dirs) || type === 'option'
// skip props & children if this is hoisted static nodes
// #5405 in dev, always hydrate children for HMR
if (__DEV__ || forcePatchValue || patchFlag !== PatchFlags.HOISTED) {
if (dirs) {
invokeDirectiveHook(vnode, null, parentComponent, 'created')
}
// props
if (props) {
if (
forcePatchValue ||
!optimized ||
patchFlag & (PatchFlags.FULL_PROPS | PatchFlags.HYDRATE_EVENTS)
) {
for (const key in props) {
if (
(forcePatchValue && key.endsWith('value')) ||
(isOn(key) && !isReservedProp(key))
) {
patchProp(
el,
key,
null,
props[key],
false,
undefined,
parentComponent
)
}
}
} else if (props.onClick) {
// Fast path for click listeners (which is most often) to avoid
// iterating through props.
patchProp(
el,
'onClick',
null,
props.onClick,
false,
undefined,
parentComponent
)
}
}
// vnode / directive hooks
let vnodeHooks: VNodeHook | null | undefined
Iif ((vnodeHooks = props && props.onVnodeBeforeMount)) {
invokeVNodeHook(vnodeHooks, parentComponent, vnode)
}
if (dirs) {
invokeDirectiveHook(vnode, null, parentComponent, 'beforeMount')
}
if ((vnodeHooks = props && props.onVnodeMounted) || dirs) {
queueEffectWithSuspense(() => {
vnodeHooks && invokeVNodeHook(vnodeHooks, parentComponent, vnode)
dirs && invokeDirectiveHook(vnode, null, parentComponent, 'mounted')
}, parentSuspense)
}
// children
if (
shapeFlag & ShapeFlags.ARRAY_CHILDREN &&
// skip if element has innerHTML / textContent
!(props && (props.innerHTML || props.textContent))
) {
let next = hydrateChildren(
el.firstChild,
vnode,
el,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
let hasWarned = false
while (next) {
hasMismatch = true
if (__DEV__ && !hasWarned) {
warn(
`Hydration children mismatch in <${vnode.type as string}>: ` +
`server rendered element contains more child nodes than client vdom.`
)
hasWarned = true
}
// The SSRed DOM contains more nodes than it should. Remove them.
const cur = next
next = next.nextSibling
remove(cur)
}
} else if (shapeFlag & ShapeFlags.TEXT_CHILDREN) {
if (el.textContent !== vnode.children) {
hasMismatch = true
__DEV__ &&
warn(
`Hydration text content mismatch in <${
vnode.type as string
}>:\n` +
`- Client: ${el.textContent}\n` +
`- Server: ${vnode.children as string}`
)
el.textContent = vnode.children as string
}
}
}
return el.nextSibling
}
const hydrateChildren = (
node: Node | null,
parentVNode: VNode,
container: Element,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean
): Node | null => {
optimized = optimized || !!parentVNode.dynamicChildren
const children = parentVNode.children as VNode[]
const l = children.length
let hasWarned = false
for (let i = 0; i < l; i++) {
const vnode = optimized
? children[i]
: (children[i] = normalizeVNode(children[i]))
if (node) {
node = hydrateNode(
node,
vnode,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
} else if (vnode.type === Text && !vnode.children) {
continue
} else {
hasMismatch = true
if (__DEV__ && !hasWarned) {
warn(
`Hydration children mismatch in <${container.tagName.toLowerCase()}>: ` +
`server rendered element contains fewer child nodes than client vdom.`
)
hasWarned = true
}
// the SSRed DOM didn't contain enough nodes. Mount the missing ones.
patch(
null,
vnode,
container,
null,
parentComponent,
parentSuspense,
isSVGContainer(container),
slotScopeIds
)
}
}
return node
}
const hydrateFragment = (
node: Comment,
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean
) => {
const { slotScopeIds: fragmentSlotScopeIds } = vnode
Iif (fragmentSlotScopeIds) {
slotScopeIds = slotScopeIds
? slotScopeIds.concat(fragmentSlotScopeIds)
: fragmentSlotScopeIds
}
const container = parentNode(node)!
const next = hydrateChildren(
nextSibling(node)!,
vnode,
container,
parentComponent,
parentSuspense,
slotScopeIds,
optimized
)
if (next && isComment(next) && next.data === ']') {
return nextSibling((vnode.anchor = next))
} else {
// fragment didn't hydrate successfully, since we didn't get a end anchor
// back. This should have led to node/children mismatch warnings.
hasMismatch = true
// since the anchor is missing, we need to create one and insert it
insert((vnode.anchor = createComment(`]`)), container, next)
return next
}
}
const handleMismatch = (
node: Node,
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
isFragment: boolean
): Node | null => {
hasMismatch = true
__DEV__ &&
warn(
`Hydration node mismatch:\n- Client vnode:`,
vnode.type,
`\n- Server rendered DOM:`,
node,
node.nodeType === DOMNodeTypes.TEXT
? `(text)`
: isComment(node) && node.data === '['
? `(start of fragment)`
: ``
)
vnode.el = null
if (isFragment) {
// remove excessive fragment nodes
const end = locateClosingAsyncAnchor(node)
while (true) {
const next = nextSibling(node)
if (next && next !== end) {
remove(next)
} else {
break
}
}
}
const next = nextSibling(node)
const container = parentNode(node)!
remove(node)
patch(
null,
vnode,
container,
next,
parentComponent,
parentSuspense,
isSVGContainer(container),
slotScopeIds
)
return next
}
const locateClosingAsyncAnchor = (node: Node | null): Node | null => {
let match = 0
while (node) {
node = nextSibling(node)
if (node && isComment(node)) {
Iif (node.data === '[') match++
if (node.data === ']') {
if (match === 0) {
return nextSibling(node)
} else E{
match--
}
}
}
}
return node
}
return [hydrate, hydrateNode] as const
}
|