When using feature flags in web applications, rendering a page with default flag values before the SDK initializes can cause a “flicker” as content updates. To prevent this, consider these strategies:
Initialize Early: Prioritize the SDK initialize to evaluate flags sooner, minimizing delays.
Delay Rendering: Hide the page (e.g., set body to display: none, or use the waitForReady prop in the React SDK) until the SDK signals readiness, then show the correct content.
SDK initialization time, usually 30-50 milliseconds, depends on flag count and ruleset complexity.
Bootstrap Flags: Provide initial flag values for immediate use, avoiding fetch delays.
See Bootstrapping for details on providing initial flag values.