Add option to persist a notification until dismissed

[mckernanin]

I would like to be able to have a notification persist, until manually dismissed by the user. I'm happy to work on this and create a PR, wanted to open an issue first to make sure this is a feature you'd be open to adding.

[iamhosseindhv]

Thanks for opening the issue first @mckernanin.

You can set autoHideDuration prop to null or undefined to prevent snackbars from getting dismissed. However, if you've enabled stacking behaviour (i.e. maxSnack > 1), your notification will get dismissed by notistack when maxSnack is reached.

You're welcome to make a PR for these cases. Suggestion implementation is to allow a new option persist: true|false in the options parameter of enqueueSnackbar, and default it to be false.

I'll merge your PR or add support for this myself after 22 Jan (as I'm in the middle of university exams).

[cevr]

Hi, @iamhosseindhv. Can this be added to the documentation?

[iamhosseindhv]

@cevr Support for this feature hasn't been added yet. But of course documentation will be updated once the feature is published.

[iamhosseindhv]

Happy to say this feature is now in master and will be published in the next release.
Thanks to @mckernanin for feature request and @butchmarshall for the PR. ❤️