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[Vega][Inspect panel] Write tutorials and reference (#73262)
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* [Vega][Inspect panel] Write tutorials and reference

* update screens

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

* Update docs/visualize/vega.asciidoc

Co-authored-by: Kaarina Tungseth <[email protected]>

Co-authored-by: Elastic Machine <[email protected]>
Co-authored-by: Kaarina Tungseth <[email protected]>
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65 changes: 40 additions & 25 deletions docs/visualize/vega.asciidoc
Original file line number Diff line number Diff line change
Expand Up @@ -1505,6 +1505,46 @@ Vega can load data from any URL, but this is disabled by default in {kib}.
To change this, set `vis_type_vega.enableExternalUrls: true` in `kibana.yml`,
then restart {kib}.

[[vega-inspector]]
==== Vega Inspector
Use the contextual *Inspect* tool to gain insights into different elements.
For Vega visualizations, there are two different views: *Request* and *Vega debug*.

===== Inspect Elasticsearch requests

Vega uses the {ref}/search-search.html[{es} search API] to get documents and aggregation
results from {es}. To troubleshoot these requests, click *Inspect*, which shows the most recent requests.
In case your specification has more than one request, you can switch between the views using the *View* dropdown.

[role="screenshot"]
image::visualize/images/vega_tutorial_inspect_requests.png[]

===== Vega debugging

With the *Vega debug* view, you can inspect the *Data sets* and *Signal Values* runtime data.

The runtime data is read from the
https://vega.github.io/vega/docs/api/debugging/#scope[runtime scope].

[role="screenshot"]
image::visualize/images/vega_tutorial_inspect_data_sets.png[]

To debug more complex specs, access to the `view` variable. For more information, refer to
the <<vega-browser-debugging-console, Vega browser debugging process>>.

===== Asking for help with a Vega spec

Because of the dynamic nature of the data in {es}, it is hard to help you with
Vega specs unless you can share a dataset. To do this, click *Inspect*, select the *Vega debug* view,
then select the *Spec* tab:

[role="screenshot"]
image::visualize/images/vega_tutorial_getting_help.png[]

To copy the response, click *Copy to clipboard*. Paste the copied data to
https://gist.github.com/[gist.github.com], possibly with a .json extension. Use the [raw] button,
and share that when asking for help.

[[vega-browser-debugging-console]]
==== Browser debugging console

Expand All @@ -1522,31 +1562,6 @@ of Vega-Lite, this is the output of the Vega-Lite compiler.
* `vegalite_spec` &mdash; If this is a Vega-Lite graph, JSON specification of the graph before
Vega-Lite compilation.

[[vega-data]]
==== Debugging data

experimental[] If you are using an {es} query, make sure your resulting data is
what you expected. The easiest way to view it is by using the "networking"
tab in the browser debugging tools (for example, F12). Modify the graph slightly
so that it makes a search request, and view the response from the
server. Another approach is to use
https://www.elastic.co/guide/en/kibana/current/console-kibana.html[Dev Tools]. Place the index name into the first line:
`GET <INDEX_NAME>/_search`, then add your query as the following lines
(just the value of the `"query"` field).

[[vega-getting-help]]
==== Asking for help with a Vega spec

Because of the dynamic nature of the data in {es}, it is hard to help you with
Vega specs unless you can share a dataset. To do this, use the browser developer
tools and type:

`JSON.stringify(VEGA_DEBUG.vegalite_spec, null, 2)`

Copy the response to https://gist.github.com/[gist.github.com], possibly
with a `.json` extension, use the `[raw]` button, and share that when
asking for help.

[float]
[[vega-expression-functions]]
==== (Vega only) Expression functions which can update the time range and dashboard filters
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