/
ssrRenderSlot.ts
92 lines (88 loc) 路 2.21 KB
/
ssrRenderSlot.ts
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import { ComponentInternalInstance, Slots } from 'vue'
import { Props, PushFn, renderVNodeChildren, SSRBufferItem } from '../render'
import { isArray } from '@vue/shared'
export type SSRSlots = Record<string, SSRSlot>
export type SSRSlot = (
props: Props,
push: PushFn,
parentComponent: ComponentInternalInstance | null,
scopeId: string | null
) => void
export function ssrRenderSlot(
slots: Slots | SSRSlots,
slotName: string,
slotProps: Props,
fallbackRenderFn: (() => void) | null,
push: PushFn,
parentComponent: ComponentInternalInstance,
slotScopeId?: string
) {
// template-compiled slots are always rendered as fragments
push(`<!--[-->`)
ssrRenderSlotInner(
slots,
slotName,
slotProps,
fallbackRenderFn,
push,
parentComponent,
slotScopeId
)
push(`<!--]-->`)
}
export function ssrRenderSlotInner(
slots: Slots | SSRSlots,
slotName: string,
slotProps: Props,
fallbackRenderFn: (() => void) | null,
push: PushFn,
parentComponent: ComponentInternalInstance,
slotScopeId?: string
) {
const slotFn = slots[slotName]
if (slotFn) {
const slotBuffer: SSRBufferItem[] = []
const bufferedPush = (item: SSRBufferItem) => {
slotBuffer.push(item)
}
const ret = slotFn(
slotProps,
bufferedPush,
parentComponent,
slotScopeId ? ' ' + slotScopeId : ''
)
if (isArray(ret)) {
// normal slot
renderVNodeChildren(push, ret, parentComponent, slotScopeId)
} else {
// ssr slot.
// check if the slot renders all comments, in which case use the fallback
let isEmptySlot = true
for (let i = 0; i < slotBuffer.length; i++) {
if (!isComment(slotBuffer[i])) {
isEmptySlot = false
break
}
}
if (isEmptySlot) {
if (fallbackRenderFn) {
fallbackRenderFn()
}
} else {
for (let i = 0; i < slotBuffer.length; i++) {
push(slotBuffer[i])
}
}
}
} else if (fallbackRenderFn) {
fallbackRenderFn()
}
}
const commentRE = /<!--[^]*?-->/gm
function isComment(item: SSRBufferItem) {
return (
typeof item === 'string' &&
commentRE.test(item) &&
!item.replace(commentRE, '').trim()
)
}