当您在 Firebase 上设置 AB 测试实验时，您可以选择一个激活事件来确定谁可以参与实验。我不确定的是：是每个人都曾触发过该事件，还是只是在实验上线后触发了该事件的人？文档对此似乎模棱两可。
https://firebase.google.com/docs/ab-testing/abtest-config
或者，设置激活事件以确保只有首先触发了某些 Analytics 事件的用户才会被计入您的实验，然后单击下一步。
我需要知道，因为我只想定位触发此事件的新用户，而不是实验开始之前的用户。谢谢。
The activation events are the events logged by the app in the last 30 days, regardless of users. If you can see it in your Events page, then it should be available on A/B Testing console as an activation event.
If a user satisfies the targeting criteria and calls fetch > activate or fetchAndActivate method, then the user will be part of the experiment. Logging the activation event will make sure that the data logged by the user will be included in the experiment.