Hi, searching for suggestion here. The case is when we want to use url parameter to control the feature flag. like

/signup?feature-a=true

is there a best practice for growthbook to support it? I know we can define a force rule and inject url parameter to setUser. but it seems not the best way to do it.

Is this for testing/QA purposes or something you actually want to do in production?

I think for both. but testing should be the main issue here. we don’t want to add too many rules only for testing.

And which SDK language are you using?

js

You could use the

setForcedFeatures

method to force specific values based on the query string. It would look something like this:

// TODO: get from the actual querystring
const querystringKeyValues = [["feature-a", true]]

const forcedFeatures = new Map();
querystringKeyValues.forEach(([key, value]) => {
  forcedFeatures.set(key, value);
});
growthbook.setForcedFeatures(forcedFeatures);

👍

Yes, the feature keys need to match for the overrides to work

So it doesn’t matter if we set one feature twice, both in features and forced features

Correct. The forced value will take precedence if both are set

Thank you, this solve my problem.