Highlight will not run if H.init() is not called or projectId is undefined. For most people, you don't want to record sessions from localhost
Here's an example of disabling Highlight while developing locally with H.init():
Here's an example of disabling Highlight while developing locally with environment variables:
Highlight monkey patches the browser's console methods in order to record console messages. A side effect of this is that all the console messages' initiators will point to Highlight. This can make debugging hard because you can't see where console messages are coming from.
To prevent this from happening, you can:
Here's an example of how you disable console message recording locally.