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Add warning when using react-error-overlay in production #3264

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merged 3 commits into from
Oct 11, 2017
Merged

Add warning when using react-error-overlay in production #3264

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397b5ae
Add a warning when running minified
Timer Oct 11, 2017
2410af7
Add more robust check
Timer Oct 11, 2017
85109c3
Update index.js
Timer Oct 11, 2017
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21 changes: 21 additions & 0 deletions packages/react-error-overlay/src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -167,3 +167,24 @@ window.__REACT_ERROR_OVERLAY_GLOBAL_HOOK__.iframeReady = function iframeReady()
isLoadingIframe = false;
updateIframeContent();
};

const warningText =
'When deploying an application, `react-error-overlay` should be excluded ' +
'as it is a heavy dependency meant for development.\n\n' +
'Consider adding an error boundary to your tree to customize error ' +
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Why do we need the error boundary text here? Doesn't seem very relevant.

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If someone was purposely including react-error-overlay for production errors, though I know most cases would be accidental.

We can remove this.

'handling behavior. See https://fb.me/react-error-boundaries for more ' +
'information.';

if (process.env.NODE_ENV !== 'production') {
var testFunc = function testFn() {};
if ((testFunc.name || testFunc.toString()).indexOf('testFn') === -1) {
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toString() is not guaranteed to be safe. I'd opt to remove this branch completely and for now just assume process.env.NODE_ENV is correct. We have detection in React DevTools for other cases.

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I suppose this would probably error out if they did not envify variables, so I agree.

console.warn(
'It looks like you are using `react-error-overlay` in production. ' +
warningText
);
}
} else {
console.warn(
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Maybe this could be more severe with console.error, or perhaps throw.

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IMO it makes more sense to go with warn as it's technically not an error.

'You are using `react-error-overlay` in production. ' + warningText
);
}