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See the ",[625,626,630],"a",{"href":627,"rel":628},"https:\u002F\u002Fgithub.com\u002Fwinstonjs\u002Fwinston",[629],"nofollow","Winston documentation",".",[633,634,635,648],"table",{},[636,637,638],"thead",{},[639,640,641,645],"tr",{},[642,643,644],"th",{},"Existing requirement",[642,646,647],{},"What to check in evlog",[649,650,651,660,668,676,684],"tbody",{},[639,652,653,657],{},[654,655,656],"td",{},"Custom levels",[654,658,659],{},"Map them to four severities and update queries or alerts that depend on the original values.",[639,661,662,665],{},[654,663,664],{},"Format chain",[654,666,667],{},"Decide which transformations become context fields, plugin hooks, or drain serialization.",[639,669,670,673],{},[654,671,672],{},"Custom transport",[654,674,675],{},"Find a matching drain or port the protocol and delivery behavior.",[639,677,678,681],{},[654,679,680],{},"Per-transport level",[654,682,683],{},"Preserve destination-specific filtering explicitly in the delivery configuration.",[639,685,686,689],{},[654,687,688],{},"Exception\u002Frejection handler",[654,690,691],{},"Keep process-level failure handling separate from an individual request's error event.",[608,693,695],{"id":694},"decide-who-assembles-the-final-event","Decide who assembles the final event",[604,697,698,699,702,703,706,707,710],{},"Winston can log a completed object once. The application decides how to collect it. evlog's ",[616,700,701],{},"createLogger()"," provides that accumulator, ",[616,704,705],{},"set()"," adds context, and ",[616,708,709],{},"emit()"," produces the final event. Framework integrations manage that operation lifecycle.",[604,712,713,714,716],{},"Use ",[625,715,51],{"href":52}," to decide whether this model removes code from your handlers. It does not automatically preserve a Winston output schema, and changing several records into one may require new dashboard queries.",[608,718,720],{"id":719},"migrate-with-observable-checkpoints","Migrate with observable checkpoints",[604,722,723,724,727],{},"Choose one operation and document the output fields consumers require. Configure an evlog ",[625,725,726],{"href":153},"drain adapter",", then exercise success and failure against a test destination. Confirm that redaction, severity mapping, retries, and process shutdown meet the same requirements as the existing path.",[604,729,730,731,734],{},"Keep Winston when format composition or custom transports already solve the problem. Consider evlog when accumulated context, structured errors, and its integration lifecycle reduce application code. Neither a library's age nor unequal-output benchmarks establish which is better for your workload. The ",[625,732,733],{"href":548},"Performance reference"," explains the measurements to compare.",[604,736,737,738,741],{},"Use the ",[625,739,740],{"href":561},"logger overview"," to compare the other options before expanding a migration.",{"title":743,"searchDepth":744,"depth":744,"links":745},"",2,[746,747,748],{"id":610,"depth":744,"text":611},{"id":694,"depth":744,"text":695},{"id":719,"depth":744,"text":720},"Compare Winston formats, transports, and custom levels with evlog event accumulation before migrating an existing application.","md",[752],{"label":753,"icon":563,"to":561,"color":754,"variant":755},"Logger overview","neutral","subtle",{},{"icon":563},{"title":591,"description":749},"nlefN3HfVy1y0t10PcuGAq3gzdmf89BzpG-N6RsUSXc",[761,763],{"title":587,"path":588,"stem":589,"description":762,"icon":563,"children":-1},"Compare LogTape categories, application-owned configuration, context propagation, and testing with evlog request events.",{"title":595,"path":596,"stem":597,"description":764,"icon":563,"children":-1},"Keep Consola for terminal interaction or custom reporters, and evaluate evlog when your application needs accumulated request events.",1789076915996]