A toggle is a rod-shaped fastener that’s pushed through a loop or eye to fasten something. It’s used on clothes and other articles, and on computers and machines. You can also use it to switch between functions, like turning the Caps Lock key on and off. For example, you might toggle between screen shots during a video call with two friends at the same time.
Toggle switches are often used for updating preferences, settings, and other types of information on a website or app. When using toggles, they should be clearly labeled and implement standard visual design, so that users can understand what effect each setting has. They’re useful when you need to give the user an option that has a clear, immediate impact.
Toggle configuration management is a complex topic once you start to scale beyond a few settings. Using static files can become cumbersome and ensuring consistency across an entire fleet of servers is challenging. To solve this issue many teams opt for a more dynamic approach to managing toggle configuration by moving them into some sort of centralized store, often an existing application DB. This is typically accompanied by the build out of a UI for administrators, testers and product managers to view, modify and test toggle configurations. This type of toggle configuration override is particularly critical for things like Experiment Toggles and other data-driven optimizations. In these cases it’s essential that a feature flag can be re-configured without having to re-deploy an entire artifact into the test environment.