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FB bundles wrap warning() calls in __DEV__ (#10314)

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FB bundles wrap warning() calls in __DEV__

Split dev-mode transforms into separate parts:
1) umd+cjs+fb: Wrap warning calls with process.env checks
2) umd+cjs: Replace error messages with minified codes

Also updated transforms to use __DEV__ since it transforms to smaller code after stripEnvVariables is run.

Also renamed 'scripts/error-codes/dev-expression-with-codes.js' -> 'scripts/error-codes/replace-invariant-error-codes.js'
This commit is contained in:
Brian Vaughn
2017-08-02 14:14:26 -07:00
committed by GitHub
parent d615fe40a1
commit cdc61051ce
1 changed files with 1 additions and 1 deletions
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_posts/2016-07-11-introducing-reacts-error-code-system.md
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@@ -9,7 +9,7 @@ Prior to this release, we stripped out error messages at build-time and this is
> Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.
In order to make debugging in production easier, we're introducing an Error Code System in [15.2.0](https://github.com/facebook/react/releases/tag/v15.2.0). We developed a [gulp script](https://github.com/facebook/react/blob/master/scripts/error-codes/gulp-extract-errors.js) that collects all of our `invariant` error messages and folds them to a [JSON file](https://github.com/facebook/react/blob/master/scripts/error-codes/codes.json), and at build-time Babel uses the JSON to [rewrite](https://github.com/facebook/react/blob/master/scripts/error-codes/dev-expression-with-codes.js) our `invariant` calls in production to reference the corresponding error IDs. Now when things go wrong in production, the error that React throws will contain a URL with an error ID and relevant information. The URL will point you to a page in our documentation where the original error message gets reassembled.
In order to make debugging in production easier, we're introducing an Error Code System in [15.2.0](https://github.com/facebook/react/releases/tag/v15.2.0). We developed a [gulp script](https://github.com/facebook/react/blob/master/scripts/error-codes/gulp-extract-errors.js) that collects all of our `invariant` error messages and folds them to a [JSON file](https://github.com/facebook/react/blob/master/scripts/error-codes/codes.json), and at build-time Babel uses the JSON to [rewrite](https://github.com/facebook/react/blob/master/scripts/error-codes/replace-invariant-error-codes.js) our `invariant` calls in production to reference the corresponding error IDs. Now when things go wrong in production, the error that React throws will contain a URL with an error ID and relevant information. The URL will point you to a page in our documentation where the original error message gets reassembled.
While we hope you don't see errors often, you can see how it works [here](/react/docs/error-decoder.html?invariant=109&args[]=Foo). This is what the same error from above will look like: