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fix(ssr): ensure computed only run once during render #9688

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merged 1 commit into from Dec 1, 2023
Merged

fix(ssr): ensure computed only run once during render #9688

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1 change: 0 additions & 1 deletion packages/server-renderer/__tests__/ssrComputed.spec.ts
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Expand Up @@ -33,7 +33,6 @@ test('computed reactivity during SSR', async () => {
// In both cases we need to fetch data.
if (!msg.value) await store.fetchData()

expect(msg.value).toBe('hello world')
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For the reasons for deleting this line, see #5300 (comment)

return () => h('div', null, msg.value + msg.value + msg.value)
})

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5 changes: 4 additions & 1 deletion packages/server-renderer/src/render.ts
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Expand Up @@ -144,7 +144,10 @@ function renderComponentSubTree(
// perf: enable caching of computed getters during render
// since there cannot be state mutations during render.
for (const e of instance.scope.effects) {
if (e.computed) e.computed._cacheable = true
if (e.computed) {
e.computed._dirty = true
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Make sure that during ssrRender(), the computed is executed only once and then cached.

e.computed._cacheable = true
}
}

const ssrRender = instance.ssrRender || comp.ssrRender
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