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---
name: Bug Report
about: If something isn't working as expected.
---
## Bug Report
### Steps to Reproduce:
Please provide a full reproduction of the issue. There are three ways we accept
repros:
1. If the issue you are reporting is a UX/UI issue which can be recreated by
visiting a Perspective demo _hosted by the project itself_, and any dataset
required to reproduce the error can be included in the report. In this case,
please provide detailed step-by-step instructions on how to reproduce,
including any screenshots which help illustrate, as well as including any
fully-encoded test data we may need.
2. If you are reporting a build or installation issue with the library itself,
which can be recreated from a shell. In this case, please provided detailed
code blocks describing how you tried to install, which commands were issued,
including and dependencies you needed to install and hwo you installed them.
3. If you are reporting a _anything else_, including but not limited to:
- Build issues which require _any_ metadata files e.g. a `package.json`,
`Cargo.toml`, etc
- Bundler or packaging errors with JavaScript
- Library functions which return the wrong results or error
- CPU or memory usage performance regressions, or regressions in thread
utilization
In this case, we require a _complete reproduction_ of the issue in the form
of a repository. Quoting this exceptional definition from
[@Rich-Harris's micro-essay on Repros](https://gist.github.com/Rich-Harris/88c5fc2ac6dc941b22e7996af05d70ff),
please follow these guidelines:
> 1. Create a sample repo on GitHub (or wherever)
> 2. Demonstrate the problem, and nothing but the problem. If the app where
> you're experiencing the issue happens to use Gulp, I don't care,
> unless the problem involves Gulp. Remove that stuff. Whittle it down
> to the _bare minimum_ of code that reliably demonstrates the issue.
> Get rid of any dependencies that aren't _directly_ related to the
> problem.
> 3. Install all your dependencies to `package.json`. If I can't clone the
> repo and do `npm install && npm run build` (or similar see point 4)
> to see the problem, because I need some globally installed CLI tool or
> whatever, then you've made it harder to get to the bottom of the
> issue.
> 4. Include instructions in the repo, along with a description of the
> expected and actual behaviour. Obviously the issue should include
> information about the bug as well, but it's really helpful if
> `README.md` includes that information, plus a link back to the issue.
> If there are any instructions beyond `npm install && npm run build`,
> they should go here.
Some examples which _do not_ qualify as _complete_ and are mostly useless to
us for debugging:
- Instructions which ask us to visit a website or download an application,
even if it is _completely_ open source (and expecially if it is not)
- Instructions which just describe how to create a project, e.g. with a
specific build tool or template
- Screenshots of exceptions
- Screenshots of code
- Code snippets copied from a larger application context
### Expected Result:
Describe what you expected to see. If you are reporting a UX/UI error, this may
include screenshots with annotations.
### Actual Result:
Describe what actually happened, with special attention to the errant behavior.
Always include:
- OS and version
- Platform/language + version
If you are reporting a UX/UI error:
- (if websocket) Platform/language + version of remote perspective server.
- Full exception/error message if applicable.
- Any potentially relevent JavaScript developer console error logs.
- Screenshots of the UI in an obviously broken state. (but please try to avoid
screenshots of your code, see below)
If you are reporting a library error:
- (if websocket) Platform/language + version of remote perspective server.
- Full exception error capture (please include the entire stack trace, including
"caused by" entries), log entries, etc. where appropriate. Please avoid
posting screenshots of code (which we may need to debug).
If you are reporting a build or install error:
- Full error output from running your repro, formatted as a code block (please
_do not_ include screenshots of build logs).
### Environment:
For JavaScript (browser):
- `@perspective-dev/client` version
- Browser and version
- OS
- (if websocket) Language/version/OS of perspective server
For Node.js:
- `node` version
- OS
For Python
- `python` interpreter version (Only CPython).
- package manager and version (conda/pip/\*)
- Are you compiling from an sdist of wheel?
- Platform and version (Jupyter/tornado/lib/\*)
- OS
### Additional Context:
Add any other context about the problem here.