Vue.js 3.5.19 release notes, 21 Aug 2025

compiler-core: adjacent v-else should cause a compiler error (#13699) (911e670), closes #13698
compiler-core: prevent cached array children from retaining detached dom nodes (#13691) (7f60ef8), closes element-plus/element-plus#21408 #13211
compiler-sfc: improve type inference for generic type aliases types (#12876) (d9dd628), closes #12872
compiler-sfc: throw mismatched script langs error before invoking babel (#13194) (0562548), closes #13193
compiler-ssr: disable v-memo transform in ssr vdom fallback branch (#13725) (0a202d8), closes #13724
devtools: clear performance measures (#13701) (c875019), closes #13700
hmr: prevent updating unmounting component during HMR rerender (#13775) (6e5143d), closes #13771 #13772
hydration: also set vShow name if __FEATURE_PROD_HYDRATION_MISMATCH_DETAILS__ flag is enabled (#13777) (439e1a5), closes #13744
reactivity: warn on nested readonly ref update during unwrapping (#12141) (1498821)
runtime-core: avoid setting direct ref of useTemplateRef in dev (#13449) (4a2953f)
runtime-core: improve consistency of PublicInstanceProxyHandlers.has (#13507) (d7283f3)
suspense: don't immediately resolve suspense on last dep unmount (#13456) (a871315), closes #13453
transition: handle KeepAlive + transition leaving edge case (#13152) (3190b17), closes #13153