Open items for future PRs related primarily to `table`

• add event callbacks to table https://github.com/plotly/plotly.js/pull/2052#discussion_r142450559 including plotly_hover and plotly_click events on the cells https://github.com/plotly/plotly.js/pull/2052#issuecomment-333874540
• roll back gup utils to parcoords: https://github.com/plotly/plotly.js/pull/2052#discussion_r142444229
• get rid of camelcased classnames (use dashed) and put all classnames into constants.js: https://github.com/plotly/plotly.js/pull/2052#discussion_r142415494
• discuss and plan cell editing and possibly other related functionality (request, reply)
• represent full table state via attributes (in) and callbacks (out) such that users can specify and/or receive, in logical units (row item) where we are in scrolling; similar full state representation for other interactions such as column drag&drop https://github.com/plotly/plotly.js/pull/2052#issuecomment-333949519
• put back valign (used to be there but needs a bit of work to handle cases of LaTeX etc.)
• do more to avoid wrapping: initial render should try to render straight away (no wrapping) and iff it breaches constraints, wrapping is invoked - this makes the current 2-step process into a 3-step process but CPU upside is big if no or few cells need wrapping (worth optimizing for the plainer case and negligible cycle loss even in the worst case)
• support individual border lines in addition to boxes; maybe border collapse?
• Support for 1D header values https://github.com/plotly/plotly.js/pull/2052#discussion_r142827253
• Better handling of MathJax fill color styling https://github.com/plotly/plotly.js/pull/2052#discussion_r142469257
• Support header.format scalar value https://github.com/plotly/plotly.js/pull/2052/files#r142410512
• Reuse plots/font_attributes.js https://github.com/plotly/plotly.js/pull/2052/files#r142410981
• Move <clipPath> to fullLayout._clips https://github.com/plotly/plotly.js/pull/2052/files#r142418318
• Jasmine tests
• Checking for render glitch (high speed scrolling and then stopping) and fixing it (issue found by @rreusser )
• More defaults.js logic to let users make do with fewer attributes, for example,
  • lines shouldn’t be needed,
  • missing values (fewer or shorter vectors) could be filled with “”
  • cell heights should have the minimum of 2x the lowest font height in the row
• <strike>[ ] Fix scrollwheel scrolling issues in IE and FF</strike> now in https://github.com/plotly/plotly.js/issues/3986
• At least one more mock
• Fix dominant-baseline / alignment-baseline related issues found by @alexcjohnson
• Look into the vertical alignment issue on CI in cells with wrapped text (looks fine in the wild; issue found by @alexcjohnson ) or await the switch to the Electron based tester by @etpinard

[etpinard]

@monfera Ok if I change the issue title to table open items? There’s probably going to be a few other ones.

[jackparmer]

This issue has been tagged with NEEDS SPON$OR

A community PR for this feature would certainly be welcome, but our experience is deeper features like this are difficult to complete without the Plotly maintainers leading the effort.

Sponsorship range: $25k-$30k

What Sponsorship includes:

• Completion of this feature to the Sponsor’s satisfaction, in a manner coherent with the rest of the Plotly.js library and API
• Tests for this feature
• Long-term support (continued support of this feature in the latest version of Plotly.js)
• Documentation at plotly.com/javascript
• Possibility of integrating this feature with Plotly Graphing Libraries (Python, R, F#, Julia, MATLAB, etc)
• Possibility of integrating this feature with Dash
• Feature announcement on community.plotly.com with shout out to Sponsor (or can remain anonymous)
• Gratification of advancing the world’s most downloaded, interactive scientific graphing libraries (>50M downloads across supported languages)

Please include the link to this issue when contacting us to discuss.