Runtime Integration Failure Modes in Module Federation A Taxonomy and Mitigation Patterns
DOI:
https://doi.org/10.63282/3050-922X.IJERET-V5I2P121Keywords:
Module Federation, Webpack 5, Micro-Frontend, Runtime Integration Failure, Shared Scope, Version Conflict, Singleton Enforcement, Async Bootstrap, Federated Module Lifecycle, Javascript Dependency Isolation, Frontend Reliability, Distributed Frontend SystemsAbstract
Module Federation, introduced with Webpack 5 in October 2020, changed how JavaScript applications share code across independently deployed units. The mechanism makes micro-frontend composition practical at scale, but it also brings in a set of runtime failures that havse no equivalent in single-bundle applications. These failures do not appear at build time. They are deferred, sometimes silent, and often depend on load order or network conditions to reproduce. This paper identifies seven categories of runtime failure in Module Federation deployments, describes what causes each one and what it looks like when it occurs, and proposes a set of practical mitigation patterns with known tradeoffs. Three architecture diagrams and three reference tables are included. The intent is to give engineering teams a shared vocabulary for the failure classes most likely to cause production incidents in federated frontend systems.
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