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Merge pull request #3531 from matrix-org/jryans/cyclic-rageshake

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Allow cyclic objects in console logs
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J. Ryan Stinnett 2019-10-08 14:41:00 +01:00 committed by GitHub
commit f384d4e5c1
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1 changed files with 17 additions and 2 deletions
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15
src/rageshake/rageshake.js
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@ -1,6 +1,7 @@
/*
Copyright 2017 OpenMarket Ltd
Copyright 2018 New Vector Ltd
Copyright 2019 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -77,7 +78,21 @@ class ConsoleLogger {
if (arg instanceof Error) {
return arg.message + (arg.stack ? `\n${arg.stack}` : '');
} else if (typeof (arg) === 'object') {
try {
return JSON.stringify(arg);
} catch (e) {
// In development, it can be useful to log complex cyclic
// objects to the console for inspection. This is fine for
// the console, but default `stringify` can't handle that.
// We workaround this by using a special replacer function
// to only log values of the root object and avoid cycles.
return JSON.stringify(arg, (key, value) => {
if (key && typeof value === "object") {
return "<object>";
}
return value;
});
}
} else {
return arg;
}