*[#2884](https://github.com/facebookincubator/create-react-app/pull/2884) Improve offline heuristic for proxied environments. ([@bsyk](https://github.com/bsyk))
When a Yarn proxy is set, we will check its connectivity if we cannot reach Yarn's registry. This is often the case when DNS lookups must be made through the proxy.
*[#2853](https://github.com/facebookincubator/create-react-app/pull/2853) Allow use of scoped packages with a pinned version. ([@wileybenet](https://github.com/wileybenet))
*`react-dev-utils`
*[#2796](https://github.com/facebookincubator/create-react-app/pull/2796) Properly escape HTML tags in error overlay. ([@ccloli](https://github.com/ccloli))
Elements printed in their entirety would sometimes render as HTML. This should no longer happen and should properly render as text.
*`react-dev-utils`, `react-scripts`
*[#2834](https://github.com/facebookincubator/create-react-app/pull/2834) Make `formatWebpackMessages` return all messages ([@onigoetz](https://github.com/onigoetz))
*`react-scripts`
*[#2806](https://github.com/facebookincubator/create-react-app/pull/2806) Fix SockJS version compatibility. ([@christianbundy](https://github.com/christianbundy))
*[#2738](https://github.com/facebookincubator/create-react-app/pull/2738) Fix Jest `node` file resolution. ([@mostafah](https://github.com/mostafah))
#### :nail_care: Enhancement
*`react-scripts`
*[#2818](https://github.com/facebookincubator/create-react-app/pull/2818) Allow sourcemaps to be disabled. ([@viankakrisna](https://github.com/viankakrisna))
As applications grow more complex, it is possible webpack may run out of memory while generating source maps. They may now be disabled by setting `GENERATE_SOURCEMAP=false`.
*[#2913](https://github.com/facebookincubator/create-react-app/pull/2913) Allow flags to be passed to node when running `react-scripts`. ([@koistya](https://github.com/koistya))
*[#2574](https://github.com/facebookincubator/create-react-app/pull/2574) Upgrade to `webpack@3`. ([@themre](https://github.com/themre))
*[#2747](https://github.com/facebookincubator/create-react-app/pull/2747) Simplify webpack configuration using `Rule.oneOf`. ([@Furizaa](https://github.com/Furizaa))
*[#2650](https://github.com/facebookincubator/create-react-app/pull/2650) Make UglifyJS error friendlier. ([@viankakrisna](https://github.com/viankakrisna))
*`create-react-app`
*[#2785](https://github.com/facebookincubator/create-react-app/pull/2785) Change error wording and list conflicting files when initializing app. ([@OwenFlood](https://github.com/OwenFlood))
*`react-dev-utils`
*[#2761](https://github.com/facebookincubator/create-react-app/pull/2761) Don't prompt to install serve if already installed. ([@OwenFlood](https://github.com/OwenFlood))
*[#2740](https://github.com/facebookincubator/create-react-app/pull/2740) Support PyCharm in `launchEditor`. ([@danrr](https://github.com/danrr))
*[#2723](https://github.com/facebookincubator/create-react-app/pull/2723) Reorder vim arguments in `launchEditor` so `--remote` works. ([@trygveaa](https://github.com/trygveaa))
*`eslint-config-react-app`, `react-scripts`
*[#2735](https://github.com/facebookincubator/create-react-app/pull/2735) Upgrade to `eslint@4`. ([@trungdq88](https://github.com/trungdq88))
*`eslint-config-react-app`
*[#2701](https://github.com/facebookincubator/create-react-app/pull/2701) Set `allowTaggedTemplates` to true (eslint). ([@denkristoffer](https://github.com/denkristoffer))
#### :memo: Documentation
* Other
*[#2728](https://github.com/facebookincubator/create-react-app/pull/2728) Add Electrode to alternatives. ([@animesh10](https://github.com/animesh10))
*[#2788](https://github.com/facebookincubator/create-react-app/pull/2788) Update link for motion. ([@viankakrisna](https://github.com/viankakrisna))
*[#2697](https://github.com/facebookincubator/create-react-app/pull/2697) Fix env list ordering. ([@alexeyraspopov](https://github.com/alexeyraspopov))
*`react-dev-utils`
*[#2798](https://github.com/facebookincubator/create-react-app/pull/2798) Update note about `webpackHotDevClient` support. ([@ForbesLindesay](https://github.com/ForbesLindesay))
*`react-scripts`
*[#2822](https://github.com/facebookincubator/create-react-app/pull/2822) Add explicit "Opting Out of Caching" header. ([@gaearon](https://github.com/gaearon))
*[#2668](https://github.com/facebookincubator/create-react-app/pull/2668) Document `basename` feature in `react-router`. ([@viankakrisna](https://github.com/viankakrisna))
*[#2719](https://github.com/facebookincubator/create-react-app/pull/2719) Remove Windows note for `source-map-explorer`. ([@hodanny](https://github.com/hodanny))
*`babel-preset-react-app`
*[#2732](https://github.com/facebookincubator/create-react-app/pull/2732) Update link to issue blocking JSX hoisting. ([@ForbesLindesay](https://github.com/ForbesLindesay))
*[#2600](https://github.com/facebookincubator/create-react-app/pull/2600) Add empty mock for `dgram` Node module. ([@micopiira](https://github.com/micopiira))
*[#2458](https://github.com/facebookincubator/create-react-app/pull/2458) Add names to module factories in development. ([@Zaccc123](https://github.com/Zaccc123))
*[#2551](https://github.com/facebookincubator/create-react-app/pull/2551) In new projects, unregister service worker and force reload if `service-worker.js` is not found. ([@ro-savage](https://github.com/ro-savage))
*[#2657](https://github.com/facebookincubator/create-react-app/pull/2657) Put `react-scripts` in `dependencies`, not `devDependencies`. ([@gaearon](https://github.com/gaearon))
*[#2397](https://github.com/facebookincubator/create-react-app/pull/2397) Fix command in e2e-kitchensink.sh cleanup. ([@ro-savage](https://github.com/ro-savage))
*[#2388](https://github.com/facebookincubator/create-react-app/pull/2388) Fix wrong path expansion in end-to-end test. ([@gaearon](https://github.com/gaearon))
*[#2387](https://github.com/facebookincubator/create-react-app/pull/2387) Catch "No tests found" during CI. ([@EnoahNetzach](https://github.com/EnoahNetzach))
We’ve been working on this release for the past few months, and there are many big impovements, from migrating to webpack 2 to a brand new runtime error overlay and built-in support for Progressive Web Apps.
So instead of just enumerating them here, we decided to write a blog post about all the new features.
So instead of just enumerating them here, we decided to write a blog post about all the new features.<br>
Check it out: **[What’s New in Create React App](https://facebook.github.io/react/blog/2017/05/18/whats-new-in-create-react-app.html)**.
Have you read it? Now let's see how to update your app to the latest version.