Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 2x 2x 2x 1712x 17x 7x 7x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 10x 1712x | import type { NodeTransform } from '../transform'
import { findDir } from '../utils'
import { type ElementNode, type ForNode, type IfNode, NodeTypes } from '../ast'
import { SET_BLOCK_TRACKING } from '../runtimeHelpers'
const seen = new WeakSet()
export const transformOnce: NodeTransform = (node, context) => {
if (node.type === NodeTypes.ELEMENT && findDir(node, 'once', true)) {
if (seen.has(node) || context.inVOnce || context.inSSR) {
return
}
seen.add(node)
context.inVOnce = true
context.helper(SET_BLOCK_TRACKING)
return () => {
context.inVOnce = false
const cur = context.currentNode as ElementNode | IfNode | ForNode
if (cur.codegenNode) {
cur.codegenNode = context.cache(
cur.codegenNode,
true /* isVNode */,
true /* inVOnce */,
)
}
}
}
}
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