*[#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))
*[#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))
*[#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))
*[#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))
*[#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))
*[#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))
*[#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))
*[#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.
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)**.
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.
Have you read it? Now let's see how to update your app to the latest version.