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55x 53x 53x 55x 222x 52x 52x 193x 7x 7x 193x 2x 2x 108x 108x 6x 6x 109x 109x 109x 109x 109x 109x 109x 19x 19x 108x 112x 112x 112x 76x 112x 73x 73x 112x 17x 17x 2x 992x 992x 992x 992x 514x 514x 18x 18x 514x 335x 335x 513x 179x 179x 514x 992x | import { type ComponentInternalInstance, type Data, type FunctionalComponent, getComponentName, } from './component' import { Comment, type VNode, type VNodeArrayChildren, blockStack, cloneVNode, createVNode, isVNode, normalizeVNode, } from './vnode' import { ErrorCodes, handleError } from './errorHandling' import { PatchFlags, ShapeFlags, isModelListener, isOn } from '@vue/shared' import { warn } from './warning' import { isHmrUpdating } from './hmr' import type { NormalizedProps } from './componentProps' import { isEmitListener } from './componentEmits' import { setCurrentRenderingInstance } from './componentRenderContext' import { DeprecationTypes, isCompatEnabled, warnDeprecation, } from './compat/compatConfig' import { shallowReadonly } from '@vue/reactivity' import { setTransitionHooks } from './components/BaseTransition' /** * dev only flag to track whether $attrs was used during render. * If $attrs was used during render then the warning for failed attrs * fallthrough can be suppressed. */ let accessedAttrs: boolean = false export function markAttrsAccessed(): void { accessedAttrs = true } type SetRootFn = ((root: VNode) => void) | undefined export function renderComponentRoot( instance: ComponentInternalInstance, ): VNode { const { type: Component, vnode, proxy, withProxy, propsOptions: [propsOptions], slots, attrs, emit, render, renderCache, props, data, setupState, ctx, inheritAttrs, } = instance const prev = setCurrentRenderingInstance(instance) let result let fallthroughAttrs if (__DEV__) { accessedAttrs = false } try { if (vnode.shapeFlag & ShapeFlags.STATEFUL_COMPONENT) { // withProxy is a proxy with a different `has` trap only for // runtime-compiled render functions using `with` block. const proxyToUse = withProxy || proxy // 'this' isn't available in production builds with `<script setup>`, // so warn if it's used in dev. const thisProxy = __DEV__ && setupState.__isScriptSetup ? new Proxy(proxyToUse!, { get(target, key, receiver) { warn( `Property '${String( key, )}' was accessed via 'this'. Avoid using 'this' in templates.`, ) return Reflect.get(target, key, receiver) }, }) : proxyToUse result = normalizeVNode( render!.call( thisProxy, proxyToUse!, renderCache, __DEV__ ? shallowReadonly(props) : props, setupState, data, ctx, ), ) fallthroughAttrs = attrs } else { // functional const render = Component as FunctionalComponent // in dev, mark attrs accessed if optional props (attrs === props) if (__DEV__ && attrs === props) { markAttrsAccessed() } result = normalizeVNode( render.length > 1 ? render( __DEV__ ? shallowReadonly(props) : props, __DEV__ ? { get attrs() { markAttrsAccessed() return shallowReadonly(attrs) }, slots, emit, } : { attrs, slots, emit }, ) : render( __DEV__ ? shallowReadonly(props) : props, null as any /* we know it doesn't need it */, ), ) fallthroughAttrs = Component.props ? attrs : getFunctionalFallthrough(attrs) } } catch (err) { blockStack.length = 0 handleError(err, instance, ErrorCodes.RENDER_FUNCTION) result = createVNode(Comment) } // attr merging // in dev mode, comments are preserved, and it's possible for a template // to have comments along side the root element which makes it a fragment let root = result let setRoot: SetRootFn = undefined if ( __DEV__ && result.patchFlag > 0 && result.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT ) { ;[root, setRoot] = getChildRoot(result) } if (fallthroughAttrs && inheritAttrs !== false) { const keys = Object.keys(fallthroughAttrs) const { shapeFlag } = root if (keys.length) { if (shapeFlag & (ShapeFlags.ELEMENT | ShapeFlags.COMPONENT)) { if (propsOptions && keys.some(isModelListener)) { // If a v-model listener (onUpdate:xxx) has a corresponding declared // prop, it indicates this component expects to handle v-model and // it should not fallthrough. // related: #1543, #1643, #1989 fallthroughAttrs = filterModelListeners( fallthroughAttrs, propsOptions, ) } root = cloneVNode(root, fallthroughAttrs, false, true) } else if (__DEV__ && !accessedAttrs && root.type !== Comment) { const allAttrs = Object.keys(attrs) const eventAttrs: string[] = [] const extraAttrs: string[] = [] for (let i = 0, l = allAttrs.length; i < l; i++) { const key = allAttrs[i] if (isOn(key)) { // ignore v-model handlers when they fail to fallthrough if (!isModelListener(key)) { // remove `on`, lowercase first letter to reflect event casing // accurately eventAttrs.push(key[2].toLowerCase() + key.slice(3)) } } else { extraAttrs.push(key) } } if (extraAttrs.length) { warn( `Extraneous non-props attributes (` + `${extraAttrs.join(', ')}) ` + `were passed to component but could not be automatically inherited ` + `because component renders fragment or text or teleport root nodes.`, ) } if (eventAttrs.length) { warn( `Extraneous non-emits event listeners (` + `${eventAttrs.join(', ')}) ` + `were passed to component but could not be automatically inherited ` + `because component renders fragment or text root nodes. ` + `If the listener is intended to be a component custom event listener only, ` + `declare it using the "emits" option.`, ) } } } } if ( __COMPAT__ && isCompatEnabled(DeprecationTypes.INSTANCE_ATTRS_CLASS_STYLE, instance) && vnode.shapeFlag & ShapeFlags.STATEFUL_COMPONENT && root.shapeFlag & (ShapeFlags.ELEMENT | ShapeFlags.COMPONENT) ) { const { class: cls, style } = vnode.props || {} if (cls || style) { if (__DEV__ && inheritAttrs === false) { warnDeprecation( DeprecationTypes.INSTANCE_ATTRS_CLASS_STYLE, instance, getComponentName(instance.type), ) } root = cloneVNode( root, { class: cls, style: style, }, false, true, ) } } // inherit directives if (vnode.dirs) { if (__DEV__ && !isElementRoot(root)) { warn( `Runtime directive used on component with non-element root node. ` + `The directives will not function as intended.`, ) } // clone before mutating since the root may be a hoisted vnode root = cloneVNode(root, null, false, true) root.dirs = root.dirs ? root.dirs.concat(vnode.dirs) : vnode.dirs } // inherit transition data if (vnode.transition) { if (__DEV__ && !isElementRoot(root)) { warn( `Component inside <Transition> renders non-element root node ` + `that cannot be animated.`, ) } setTransitionHooks(root, vnode.transition) } if (__DEV__ && setRoot) { setRoot(root) } else { result = root } setCurrentRenderingInstance(prev) return result } /** * dev only * In dev mode, template root level comments are rendered, which turns the * template into a fragment root, but we need to locate the single element * root for attrs and scope id processing. */ const getChildRoot = (vnode: VNode): [VNode, SetRootFn] => { const rawChildren = vnode.children as VNodeArrayChildren const dynamicChildren = vnode.dynamicChildren const childRoot = filterSingleRoot(rawChildren, false) if (!childRoot) { return [vnode, undefined] } else if ( __DEV__ && childRoot.patchFlag > 0 && childRoot.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT ) { return getChildRoot(childRoot) } const index = rawChildren.indexOf(childRoot) const dynamicIndex = dynamicChildren ? dynamicChildren.indexOf(childRoot) : -1 const setRoot: SetRootFn = (updatedRoot: VNode) => { rawChildren[index] = updatedRoot if (dynamicChildren) { if (dynamicIndex > -1) { dynamicChildren[dynamicIndex] = updatedRoot } else if (updatedRoot.patchFlag > 0) { vnode.dynamicChildren = [...dynamicChildren, updatedRoot] } } } return [normalizeVNode(childRoot), setRoot] } export function filterSingleRoot( children: VNodeArrayChildren, recurse = true, ): VNode | undefined { let singleRoot for (let i = 0; i < children.length; i++) { const child = children[i] if (isVNode(child)) { // ignore user comment if (child.type !== Comment || child.children === 'v-if') { if (singleRoot) { // has more than 1 non-comment child, return now return } else { singleRoot = child if ( __DEV__ && recurse && singleRoot.patchFlag > 0 && singleRoot.patchFlag & PatchFlags.DEV_ROOT_FRAGMENT ) { return filterSingleRoot(singleRoot.children as VNodeArrayChildren) } } } } else { return } } return singleRoot } const getFunctionalFallthrough = (attrs: Data): Data | undefined => { let res: Data | undefined for (const key in attrs) { if (key === 'class' || key === 'style' || isOn(key)) { ;(res || (res = {}))[key] = attrs[key] } } return res } const filterModelListeners = (attrs: Data, props: NormalizedProps): Data => { const res: Data = {} for (const key in attrs) { if (!isModelListener(key) || !(key.slice(9) in props)) { res[key] = attrs[key] } } return res } const isElementRoot = (vnode: VNode) => { return ( vnode.shapeFlag & (ShapeFlags.COMPONENT | ShapeFlags.ELEMENT) || vnode.type === Comment // potential v-if branch switch ) } export function shouldUpdateComponent( prevVNode: VNode, nextVNode: VNode, optimized?: boolean, ): boolean { const { props: prevProps, children: prevChildren, component } = prevVNode const { props: nextProps, children: nextChildren, patchFlag } = nextVNode const emits = component!.emitsOptions // Parent component's render function was hot-updated. Since this may have // caused the child component's slots content to have changed, we need to // force the child to update as well. if (__DEV__ && (prevChildren || nextChildren) && isHmrUpdating) { return true } // force child update for runtime directive or transition on component vnode. if (nextVNode.dirs || nextVNode.transition) { return true } if (optimized && patchFlag >= 0) { if (patchFlag & PatchFlags.DYNAMIC_SLOTS) { // slot content that references values that might have changed, // e.g. in a v-for return true } if (patchFlag & PatchFlags.FULL_PROPS) { if (!prevProps) { return !!nextProps } // presence of this flag indicates props are always non-null return hasPropsChanged(prevProps, nextProps!, emits) } else if (patchFlag & PatchFlags.PROPS) { const dynamicProps = nextVNode.dynamicProps! for (let i = 0; i < dynamicProps.length; i++) { const key = dynamicProps[i] if ( nextProps![key] !== prevProps![key] && !isEmitListener(emits, key) ) { return true } } } } else { // this path is only taken by manually written render functions // so presence of any children leads to a forced update if (prevChildren || nextChildren) { if (!nextChildren || !(nextChildren as any).$stable) { return true } } if (prevProps === nextProps) { return false } if (!prevProps) { return !!nextProps } if (!nextProps) { return true } return hasPropsChanged(prevProps, nextProps, emits) } return false } function hasPropsChanged( prevProps: Data, nextProps: Data, emitsOptions: ComponentInternalInstance['emitsOptions'], ): boolean { const nextKeys = Object.keys(nextProps) if (nextKeys.length !== Object.keys(prevProps).length) { return true } for (let i = 0; i < nextKeys.length; i++) { const key = nextKeys[i] if ( nextProps[key] !== prevProps[key] && !isEmitListener(emitsOptions, key) ) { return true } } return false } export function updateHOCHostEl( { vnode, parent }: ComponentInternalInstance, el: typeof vnode.el, // HostNode ): void { while (parent) { const root = parent.subTree if (root.suspense && root.suspense.activeBranch === vnode) { root.el = vnode.el } if (root === vnode) { ;(vnode = parent.vnode).el = el parent = parent.parent } else { break } } } |