"Fear is freedom! Subjugation is liberation! Contradiction is truth!"
"恐惧就是自由！征服就是解放！矛盾就是真理！"
新版了带来一些改进和 bug 修复，具体如下：
更新：
Full SSR + async component support in core: SSR now supports rendering async components used anywhere and the client also supports async components during the hydration phase. This means async components / code-splitting now just works during SSR and is no longer limited at the route level. (9cf6646 & 7404091)
Easier creation of wrapper components: (6118759)
New component option: inheritAttrs. Turns off the default behavior where
parent scope non-prop bindings are automatically inherited on component root
as attributes.
New instance properties: $attrs & $listeners. $attrs contains the parent-scope attribute bindings that were not recognized as props, and $listeners contains the v-on listeners registered in the parent scope (without the .native modifier). These are essentially aliases of $vnode.data.attrs and $vnode.data.on, but are reactive.
Combining these allows us to simplify a component like this down into this:
v-on: support v-on object syntax with no arguments. This pairs well with the new $listeners instance property when creating higher-order components. Note this syntax does not support modifiers. (11614d6)
Now auto-resolves ES module default export when resolving async components. This enables keeping using the simpler const Foo = () => import('./Foo.vue') syntax when declaring async components with the changes introduced in vue-loader@13.0.0. (0cd6ef3)
support .sync modifier for v-bind="object" (#5943) (3965e50), closes #5937
keep-alive: support Array for include and exclude (#5956) (51c595a)
weex: implement "weex.supports" api to support feature detection (#6053) (b1512d8)
vm.$watch now also supports using the same object format supported by the watch component option: { handler: () => {}, deep: true } (#5645) (5aac170)
types: add types for vue-server-renderer (#5775) (e6de9a5)
Vue.config.errorHandler now also captures errors thrown in custom event handlers (#5709) (11b7d5d)
add new config option Vue.config.warnHandler for defining a custom callback for runtime warnings. This only works in the development build. (#5883) (9881b40)
add comments option to allow preserving comments in template (#5951) (e4da249), closes #5392
性能改进：
ssr: vue-template-compiler now has two new SSR-specific compile methods that generates SSR-specific render function code by optimizing parts of the template into string concatenation. This improves raw SSR render performance by 2~8x depending on how much of the template can be optimized. Note this will have a much smaller impact on requests per second for a real app because raw render performance is only a small portion of the overall time spent in a request.
This is enabled by default in vue-loader@>=12 and can be disabled using the optimizeSSR option.
remove src directory from npm module, which should reduce download size when installing from npm. (#6072) (e761573)
Vue 2.4.0 正式发布了，Vue 是一款轻量级 JavaScript MVVM框架。
"Fear is freedom! Subjugation is liberation! Contradiction is truth!" "恐惧就是自由！征服就是解放！矛盾就是真理！"
新版了带来一些改进和 bug 修复，具体如下：
更新：
Full SSR + async component support in core: SSR now supports rendering async components used anywhere and the client also supports async components during the hydration phase. This means async components / code-splitting now just works during SSR and is no longer limited at the route level. (9cf6646 & 7404091)
Easier creation of wrapper components: (6118759)
v-on: support v-on object syntax with no arguments. This pairs well with the new $listeners instance property when creating higher-order components. Note this syntax does not support modifiers. (11614d6)
Now auto-resolves ES module default export when resolving async components. This enables keeping using the simpler const Foo = () => import('./Foo.vue') syntax when declaring async components with the changes introduced in vue-loader@13.0.0. (0cd6ef3)
support .sync modifier for v-bind="object" (#5943) (3965e50), closes #5937
keep-alive: support Array for include and exclude (#5956) (51c595a)
weex: implement "weex.supports" api to support feature detection (#6053) (b1512d8)
vm.$watch now also supports using the same object format supported by the watch component option: { handler: () => {}, deep: true } (#5645) (5aac170)
types: add types for vue-server-renderer (#5775) (e6de9a5)
Vue.config.errorHandler now also captures errors thrown in custom event handlers (#5709) (11b7d5d)
add new config option Vue.config.warnHandler for defining a custom callback for runtime warnings. This only works in the development build. (#5883) (9881b40)
add comments option to allow preserving comments in template (#5951) (e4da249), closes #5392
性能改进：
官方为 Vue 创建了一个全新的服务器端渲染指南，建议所有使用者阅读。此外，还更新了 HackerNews 的 Demo，以反映最新的最佳做法。
Bug 修复：
更新内容较多，详情请参阅发布说明：https://github.com/vuejs/vue/releases/tag/v2.4.0