Deploying micro apps with feature toggles

Feature toggling, also known as feature flagging, is a powerful technique that allows individual features to be turned on or off at runtime without requiring a redeployment. This is particularly useful in a microfrontend architecture, as it enables the independent release and control of micro apps across multiple micro applications.

With feature toggling, teams can deploy new features to production but have them “hidden” behind a toggle until they’re ready to be released. This allows for extensive testing in the live environment and enables progressive delivery techniques such as canary releases or A/B testing. If any issues arise with the new feature, it can be quickly “switched off” via the feature toggle, effectively mitigating the impact without requiring a full rollback or redeployment.

Unleash (https://www.getunleash.io/) is a popular open source tool for feature toggles.

Feature toggles can...