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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | 30x 30x 30x 30x 30x 16x 16x 16x 16x 11x 16x 16x 11x | import {
createStructuralDirectiveTransform,
ForNode,
processFor,
createCallExpression,
createFunctionExpression,
createForLoopParams,
NodeTypes
} from '@vue/compiler-dom'
import {
SSRTransformContext,
processChildrenAsStatement
} from '../ssrCodegenTransform'
import { SSR_RENDER_LIST } from '../runtimeHelpers'
// Plugin for the first transform pass, which simply constructs the AST node
export const ssrTransformFor = createStructuralDirectiveTransform(
'for',
processFor
)
// This is called during the 2nd transform pass to construct the SSR-specific
// codegen nodes.
export function ssrProcessFor(
node: ForNode,
context: SSRTransformContext,
disableNestedFragments = false
) {
const needFragmentWrapper =
!disableNestedFragments &&
(node.children.length !== 1 || node.children[0].type !== NodeTypes.ELEMENT)
const renderLoop = createFunctionExpression(
createForLoopParams(node.parseResult)
)
renderLoop.body = processChildrenAsStatement(
node.children,
context,
needFragmentWrapper
)
// v-for always renders a fragment unless explicitly disabled
if (!disableNestedFragments) {
context.pushStringPart(`<!--[-->`)
}
context.pushStatement(
createCallExpression(context.helper(SSR_RENDER_LIST), [
node.source,
renderLoop
])
)
if (!disableNestedFragments) {
context.pushStringPart(`<!--]-->`)
}
}
|