From f44ae25fcf731e51764416fa28881527326a6502 Mon Sep 17 00:00:00 2001 From: Dave Baskin <dfbaskin@gmail.com> Date: Fri, 9 Dec 2016 15:41:56 -0500 Subject: [PATCH] Adding troubleshooting information about Subresource Integrity digests. (#1220) --- packages/react-scripts/template/README.md | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/packages/react-scripts/template/README.md b/packages/react-scripts/template/README.md index bdb88df60..c1aa6c861 100644 --- a/packages/react-scripts/template/README.md +++ b/packages/react-scripts/template/README.md @@ -60,6 +60,7 @@ You can find the most recent version of this guide [here](https://github.com/fac - [Troubleshooting](#troubleshooting) - [`npm test` hangs on macOS Sierra](#npm-test-hangs-on-macos-sierra) - [`npm run build` silently fails](#npm-run-build-silently-fails) + - [Subresource integrity checks fail](#subresource-integrity-checks-fail) - [Something Missing?](#something-missing) ## Updating to New Releases @@ -1239,6 +1240,17 @@ There are also reports that *uninstalling* Watchman fixes the issue. So if nothi It is reported that `npm run build` can fail on machines with no swap space, which is common in cloud environments. If [the symptoms are matching](https://github.com/facebookincubator/create-react-app/issues/1133#issuecomment-264612171), consider adding some swap space to the machine you’re building on, or build the project locally. +### Subresource integrity checks fail + +[Subresource Integrity](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) digests are added to the build output files. For a particular scenario, these checks may fail when deployed. The files are built using `LF` characters, but if your deployment uses a Git repository for deployment (like Azure web sites) and the Git repository is set up to translate `LF` characters into `CR/LF` characters, then the checked out files will be different and the digests will be invalid. + +To fix this, just add a `.gitattributes` file to your deployment repository that will ensure the build files are not modified when checked out: + +``` +*.css text eol=lf +*.js text eol=lf +``` + ## Something Missing? If you have ideas for more “How To†recipes that should be on this page, [let us know](https://github.com/facebookincubator/create-react-app/issues) or [contribute some!](https://github.com/facebookincubator/create-react-app/edit/master/packages/react-scripts/template/README.md) -- GitLab