PR.md

P4 (13)

• scope Id should not be attached to the Rules in the keyframes
• fix the detection of forwarded slots
• adapt keepalive to ssr
• toggling branches with in-out mode should be transitioned correctly
• custom dom props should be cloned when cloning a hoisted DOM
• respect the mixed render function in ssr
• component with multi roots should be removed when unmounted, Its accompanying PR that needs to be dealt with first is #2870: targetAnchor should also be removed when unmounted
• keep the order of imports expression for the fallback branch of SSR

by other devs:

• fix(scheduler): ensure only skip unflushed job
• fix(ssr): watchEffect onInvalidate runner initialization
• fix(reactivity): ensure computed wrapped in readonly still works (close #3376)

Type (P4)

• union function prop
• Better typescript support for emit events

p3(21)

runtime-core

• should add the DEV_ROOT_FRAGMENT flag to v-if branchs
• the select tag's multiple prop should be set before the children mounting
• avoid infinite loop rendering caused by setting props multiple times
• should call hooks from chained mixins and extends
• fix the component instance returned by app.mount
• fix warning for absent props
• support shallow readonly for collections
• runtime support for the component with the is prop
• fix(Teleport): fallback to non-optimized mode when HRM performing updates
• should not set the access cache in the data-fn
• avoid generating useless createVNode helper

by other devs:

• support delay initializing props
• optimization the logic of setting __props

reactive

by other devs:

• trigger will called two times when set the same proxy value
• ensure that shallow and normal proxies are tracked seperately

compiler-core

• allow unicode to appear in identifiers

compiler-sfc

by other devs:

• should not rewrite scope variable

ssr/hydration

• should handle camel-case name when performing match assertion
• vnode is of Text type and with empty text should be skipped when hydrateChildren
• remove all blocks related to the current instance to avoid memory leaks in ssr

types

• the data type of the public instance should be unwrapped

P2(17)

reactivity

• align the get/set operations to ECMA spec
• minimize memory usage and improve runtime performance

runtime-core

• feat(scheduler): dedupe rendering jobs that are enqueued in a pre-flush job
• feat(watch): allow onInvalidate to register multiple callbacks
• fix(slot): make warnings consistent when calling slot functions outside of render function

by other devs:

• checkDuplicateKeys in patchKeyedChildren&mountChildren

runtime-dom

• the class attribute should be removed when setting an empty value

by other devs:

• trim name when matching in keep-alive components

compiler-core

• allow users to extend the globalsWhitelist
• take the comments option to fully control whether to keep comment nodes

compiler-core/ssr

by other devs:

• v-slot stop empty attribute producing syntax error

compiler-sfc

• imports in <script> should not be exposed
• support using TSMethodSignature to define prop + improve error reporting
• support inferring Date/RegExp/Error from defineProps w/ type

types

• fit the array methods to the desired type
• make createBlock work with Suspense/Teleport

by other devs:

• support for expose component types

P1(4)

• feat(template-explorer): support switching languages
• add test case for v-for that produces stable fragment
• types: allow ExtractPropTypes to make props with default values optional

by other devs

• fix(compiler-sfc): set vue peerDep as optional for compiler-sfc

RFC related(1) + Others(1)

• RFC KeepAlive: support matchBy + allow custom caching strategy
• perf: improve VNode creation performance with compiler hints