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import type { SuspenseBoundary } from './Suspense'
import {
type ElementNamespace,
MoveType,
type RendererElement,
type RendererInternals,
type RendererNode,
type RendererOptions,
queuePostRenderEffect,
traverseStaticChildren,
} from '../renderer'
import type { VNode, VNodeArrayChildren, VNodeProps } from '../vnode'
import { ShapeFlags, isString } from '@vue/shared'
import { warn } from '../warning'
import { isHmrUpdating } from '../hmr'
import { type SchedulerJob, SchedulerJobFlags } from '../scheduler'
export type TeleportVNode = VNode<RendererNode, RendererElement, TeleportProps>
export interface TeleportProps {
to: string | RendererElement | null | undefined
disabled?: boolean
defer?: boolean
}
const pendingMounts = new WeakMap<VNode, SchedulerJob>()
export const TeleportEndKey: unique symbol = Symbol('_vte')
export const isTeleport = (type: any): boolean => type.__isTeleport
const isTeleportDisabled = (props: VNode['props']): boolean =>
props && (props.disabled || props.disabled === '')
const isTeleportDeferred = (props: VNode['props']): boolean =>
props && (props.defer || props.defer === '')
const isTargetSVG = (target: RendererElement): boolean =>
typeof SVGElement !== 'undefined' && target instanceof SVGElement
const isTargetMathML = (target: RendererElement): boolean =>
typeof MathMLElement === 'function' && target instanceof MathMLElement
const resolveTarget = <T = RendererElement>(
props: TeleportProps | null,
select: RendererOptions['querySelector'],
): T | null => {
const targetSelector = props && props.to
if (isString(targetSelector)) {
Iif (!select) {
__DEV__ &&
warn(
`Current renderer does not support string target for Teleports. ` +
`(missing querySelector renderer option)`,
)
return null
} else {
const target = select(targetSelector)
Iif (__DEV__ && !target && !isTeleportDisabled(props)) {
warn(
`Failed to locate Teleport target with selector "${targetSelector}". ` +
`Note the target element must exist before the component is mounted - ` +
`i.e. the target cannot be rendered by the component itself, and ` +
`ideally should be outside of the entire Vue component tree.`,
)
}
return target as T
}
} else {
if (__DEV__ && !targetSelector && !isTeleportDisabled(props)) {
warn(`Invalid Teleport target: ${targetSelector}`)
}
return targetSelector as T
}
}
export const TeleportImpl = {
name: 'Teleport',
__isTeleport: true,
process(
n1: TeleportVNode | null,
n2: TeleportVNode,
container: RendererElement,
anchor: RendererNode | null,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
namespace: ElementNamespace,
slotScopeIds: string[] | null,
optimized: boolean,
internals: RendererInternals,
): void {
const {
mc: mountChildren,
pc: patchChildren,
pbc: patchBlockChildren,
o: { insert, querySelector, createText, createComment, parentNode },
} = internals
const disabled = isTeleportDisabled(n2.props)
let { dynamicChildren } = n2
// #3302
// HMR updated, force full diff
if (__DEV__ && isHmrUpdating) {
optimized = false
dynamicChildren = null
}
const mount = (
vnode: TeleportVNode,
container: RendererElement,
anchor: RendererNode,
) => {
// Teleport *always* has Array children. This is enforced in both the
// compiler and vnode children normalization.
Eif (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
mountChildren(
vnode.children as VNodeArrayChildren,
container,
anchor,
parentComponent,
parentSuspense,
namespace,
slotScopeIds,
optimized,
)
}
}
const mountToTarget = (vnode: TeleportVNode = n2) => {
const disabled = isTeleportDisabled(vnode.props)
const target = (vnode.target = resolveTarget(vnode.props, querySelector))
const targetAnchor = prepareAnchor(target, vnode, createText, insert)
if (target) {
// #2652 we could be teleporting from a non-SVG tree into an SVG tree
if (namespace !== 'svg' && isTargetSVG(target)) {
namespace = 'svg'
} else Iif (namespace !== 'mathml' && isTargetMathML(target)) {
namespace = 'mathml'
}
// track CE teleport targets
if (parentComponent && parentComponent.isCE) {
;(
parentComponent.ce!._teleportTargets ||
(parentComponent.ce!._teleportTargets = new Set())
).add(target)
}
if (!disabled) {
mount(vnode, target, targetAnchor)
updateCssVars(vnode, false)
}
} else if (__DEV__ && !disabled) {
warn('Invalid Teleport target on mount:', target, `(${typeof target})`)
}
}
const queuePendingMount = (vnode: TeleportVNode) => {
const mountJob: SchedulerJob = () => {
Iif (pendingMounts.get(vnode) !== mountJob) return
pendingMounts.delete(vnode)
if (isTeleportDisabled(vnode.props)) {
// Use the current parent of the placeholder instead of the
// captured `container`, which may be stale if Suspense has moved
// the branch to a different container during resolve.
const mountContainer = parentNode(vnode.el!) || container
mount(vnode, mountContainer, vnode.anchor!)
updateCssVars(vnode, true)
}
mountToTarget(vnode)
}
pendingMounts.set(vnode, mountJob)
queuePostRenderEffect(mountJob, parentSuspense)
}
if (n1 == null) {
// insert anchors in the main view
const placeholder = (n2.el = __DEV__
? createComment('teleport start')
: createText(''))
const mainAnchor = (n2.anchor = __DEV__
? createComment('teleport end')
: createText(''))
insert(placeholder, container, anchor)
insert(mainAnchor, container, anchor)
if (
isTeleportDeferred(n2.props) ||
(__FEATURE_SUSPENSE__ && parentSuspense && parentSuspense.pendingBranch)
) {
queuePendingMount(n2)
return
}
if (disabled) {
mount(n2, container, mainAnchor)
updateCssVars(n2, true)
}
mountToTarget()
} else {
// update content
n2.el = n1.el
const mainAnchor = (n2.anchor = n1.anchor)!
// Target mounting may still be pending because of deferred teleport or a
// parent suspense buffering post-render effects. In that case, replace
// the pending mount so the latest vnode goes through the mount flow.
const pendingMount = pendingMounts.get(n1)
if (pendingMount) {
pendingMount.flags! |= SchedulerJobFlags.DISPOSED
pendingMounts.delete(n1)
queuePendingMount(n2)
return
}
n2.targetStart = n1.targetStart
const target = (n2.target = n1.target)!
const targetAnchor = (n2.targetAnchor = n1.targetAnchor)!
const wasDisabled = isTeleportDisabled(n1.props)
const currentContainer = wasDisabled ? container : target
const currentAnchor = wasDisabled ? mainAnchor : targetAnchor
Iif (namespace === 'svg' || isTargetSVG(target)) {
namespace = 'svg'
} else Iif (namespace === 'mathml' || isTargetMathML(target)) {
namespace = 'mathml'
}
if (dynamicChildren) {
// fast path when the teleport happens to be a block root
patchBlockChildren(
n1.dynamicChildren!,
dynamicChildren,
currentContainer,
parentComponent,
parentSuspense,
namespace,
slotScopeIds,
)
// even in block tree mode we need to make sure all root-level nodes
// in the teleport inherit previous DOM references so that they can
// be moved in future patches.
// in dev mode, deep traversal is necessary for HMR
traverseStaticChildren(n1, n2, !__DEV__)
} else Eif (!optimized) {
patchChildren(
n1,
n2,
currentContainer,
currentAnchor,
parentComponent,
parentSuspense,
namespace,
slotScopeIds,
false,
)
}
if (disabled) {
if (!wasDisabled) {
// enabled -> disabled
// move into main container
moveTeleport(
n2,
container,
mainAnchor,
internals,
TeleportMoveTypes.TOGGLE,
)
} else {
// #7835
// When `teleport` is disabled, `to` may change, making it always old,
// to ensure the correct `to` when enabled
if (n2.props && n1.props && n2.props.to !== n1.props.to) {
n2.props.to = n1.props.to
}
}
} else {
// target changed
if ((n2.props && n2.props.to) !== (n1.props && n1.props.to)) {
const nextTarget = resolveTarget(n2.props, querySelector)
if (nextTarget) {
n2.target = nextTarget
moveTeleport(
n2,
nextTarget,
null,
internals,
TeleportMoveTypes.TARGET_CHANGE,
)
} else Eif (__DEV__) {
warn(
'Invalid Teleport target on update:',
target,
`(${typeof target})`,
)
}
} else if (wasDisabled) {
// disabled -> enabled
// move into teleport target
moveTeleport(
n2,
target,
targetAnchor,
internals,
TeleportMoveTypes.TOGGLE,
)
}
}
updateCssVars(n2, disabled)
}
},
remove(
vnode: VNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
{ um: unmount, o: { remove: hostRemove } }: RendererInternals,
doRemove: boolean,
): void {
const {
shapeFlag,
children,
anchor,
targetStart,
targetAnchor,
target,
props,
} = vnode
const disabled = isTeleportDisabled(props)
const shouldRemove = doRemove || !disabled
// A deferred teleport inside a pending suspense may be unmounted before its
// content is ever mounted. Clear the queued mount effect; the children
// loop below is skipped because nothing has been mounted yet.
const pendingMount = pendingMounts.get(vnode)
if (pendingMount) {
pendingMount.flags! |= SchedulerJobFlags.DISPOSED
pendingMounts.delete(vnode)
}
if (target) {
hostRemove(targetStart!)
hostRemove(targetAnchor!)
}
// an unmounted teleport should always unmount its children whether it's disabled or not
doRemove && hostRemove(anchor!)
// #14876 don't unmount children if nothing was mounted
if (
!pendingMount &&
(disabled || target) &&
shapeFlag & ShapeFlags.ARRAY_CHILDREN
) {
for (let i = 0; i < (children as VNode[]).length; i++) {
const child = (children as VNode[])[i]
unmount(
child,
parentComponent,
parentSuspense,
shouldRemove,
!!child.dynamicChildren,
)
}
}
},
move: moveTeleport as typeof moveTeleport,
hydrate: hydrateTeleport as typeof hydrateTeleport,
}
export enum TeleportMoveTypes {
TARGET_CHANGE,
TOGGLE, // enable / disable
REORDER, // moved in the main view
}
function moveTeleport(
vnode: VNode,
container: RendererElement,
parentAnchor: RendererNode | null,
{ o: { insert }, m: move }: RendererInternals,
moveType: TeleportMoveTypes = TeleportMoveTypes.REORDER,
): void {
// move target anchor if this is a target change.
if (moveType === TeleportMoveTypes.TARGET_CHANGE) {
insert(vnode.targetAnchor!, container, parentAnchor)
}
const { el, anchor, shapeFlag, children, props } = vnode
const isReorder = moveType === TeleportMoveTypes.REORDER
// move main view anchor if this is a re-order.
if (isReorder) {
insert(el!, container, parentAnchor)
}
// if this is a re-order and teleport is enabled (content is in target)
// do not move children. So the opposite is: only move children if this
// is not a reorder, or the teleport is disabled
// #14701 don't move children if in pending mount
if (!pendingMounts.has(vnode) && (!isReorder || isTeleportDisabled(props))) {
// Teleport has either Array children or no children.
Eif (shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
for (let i = 0; i < (children as VNode[]).length; i++) {
move(
(children as VNode[])[i],
container,
parentAnchor,
MoveType.REORDER,
)
}
}
}
// move main view anchor if this is a re-order.
if (isReorder) {
insert(anchor!, container, parentAnchor)
}
}
interface TeleportTargetElement extends Element {
// last teleport target
_lpa?: Node | null
}
function hydrateTeleport(
node: Node,
vnode: TeleportVNode,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean,
{
o: { nextSibling, parentNode, querySelector, insert, createText },
}: RendererInternals<Node, Element>,
hydrateChildren: (
node: Node | null,
vnode: VNode,
container: Element,
parentComponent: ComponentInternalInstance | null,
parentSuspense: SuspenseBoundary | null,
slotScopeIds: string[] | null,
optimized: boolean,
) => Node | null,
): Node | null {
// lookahead until we find the target anchor
// we cannot rely on return value of hydrateChildren() because there
// could be nested teleports
function hydrateAnchor(
target: TeleportTargetElement,
targetNode: Node | null,
) {
let targetAnchor = targetNode
while (targetAnchor) {
if (targetAnchor && targetAnchor.nodeType === 8) {
if ((targetAnchor as Comment).data === 'teleport start anchor') {
vnode.targetStart = targetAnchor
} else if ((targetAnchor as Comment).data === 'teleport anchor') {
vnode.targetAnchor = targetAnchor
target._lpa =
vnode.targetAnchor && nextSibling(vnode.targetAnchor as Node)
break
}
}
targetAnchor = nextSibling(targetAnchor)
}
}
function hydrateDisabledTeleport(node: Node, vnode: VNode) {
vnode.anchor = hydrateChildren(
nextSibling(node),
vnode,
parentNode(node)!,
parentComponent,
parentSuspense,
slotScopeIds,
optimized,
)
}
const target = (vnode.target = resolveTarget<Element>(
vnode.props,
querySelector,
))
const disabled = isTeleportDisabled(vnode.props)
if (target) {
// if multiple teleports rendered to the same target element, we need to
// pick up from where the last teleport finished instead of the first node
const targetNode =
(target as TeleportTargetElement)._lpa || target.firstChild
Eif (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
if (disabled) {
hydrateDisabledTeleport(node, vnode)
hydrateAnchor(target as TeleportTargetElement, targetNode)
if (!vnode.targetAnchor) {
prepareAnchor(
target,
vnode,
createText,
insert,
// if target is the same as the main view, insert anchors before current node
// to avoid hydrating mismatch
parentNode(node)! === target ? node : null,
)
}
} else {
vnode.anchor = nextSibling(node)
hydrateAnchor(target as TeleportTargetElement, targetNode)
// #11400 if the HTML corresponding to Teleport is not embedded in the
// correct position on the final page during SSR. the targetAnchor will
// always be null, we need to manually add targetAnchor to ensure
// Teleport it can properly unmount or move
if (!vnode.targetAnchor) {
prepareAnchor(target, vnode, createText, insert)
}
hydrateChildren(
targetNode && nextSibling(targetNode),
vnode,
target,
parentComponent,
parentSuspense,
slotScopeIds,
optimized,
)
}
}
updateCssVars(vnode, disabled)
} else Eif (disabled) {
Eif (vnode.shapeFlag & ShapeFlags.ARRAY_CHILDREN) {
hydrateDisabledTeleport(node, vnode)
vnode.targetStart = node
vnode.targetAnchor = nextSibling(node)
}
}
return vnode.anchor && nextSibling(vnode.anchor as Node)
}
// Force-casted public typing for h and TSX props inference
export const Teleport = TeleportImpl as unknown as {
__isTeleport: true
new (): {
$props: VNodeProps & TeleportProps
$slots: {
default(): VNode[]
}
}
}
function updateCssVars(vnode: VNode, isDisabled: boolean) {
// presence of .ut method indicates owner component uses css vars.
// code path here can assume browser environment.
const ctx = vnode.ctx
if (ctx && ctx.ut) {
let node, anchor
if (isDisabled) {
node = vnode.el
anchor = vnode.anchor
} else {
node = vnode.targetStart
anchor = vnode.targetAnchor
}
while (node && node !== anchor) {
if (node.nodeType === 1) node.setAttribute('data-v-owner', ctx.uid)
node = node.nextSibling
}
ctx.ut()
}
}
function prepareAnchor(
target: RendererElement | null,
vnode: TeleportVNode,
createText: RendererOptions['createText'],
insert: RendererOptions['insert'],
anchor: RendererNode | null = null,
) {
const targetStart = (vnode.targetStart = createText(''))
const targetAnchor = (vnode.targetAnchor = createText(''))
// attach a special property, so we can skip teleported content in
// renderer's nextSibling search
targetStart[TeleportEndKey] = targetAnchor
if (target) {
insert(targetStart, target, anchor)
insert(targetAnchor, target, anchor)
}
return targetAnchor
}
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