mirror of
https://github.com/squidfunk/mkdocs-material.git
synced 2024-06-14 11:52:32 +03:00
296 lines
10 KiB
Markdown
296 lines
10 KiB
Markdown
---
|
||
template: overrides/main.html
|
||
---
|
||
|
||
# Setting up site search
|
||
|
||
Material for MkDocs provides an excellent, client-side search implementation,
|
||
omitting the need for the integration of third-party services, which might
|
||
violate data privacy regulations. Moreover, with some effort, search can be
|
||
made available [offline][1].
|
||
|
||
[1]: #offline-search
|
||
|
||
## Configuration
|
||
|
||
### Built-in search
|
||
|
||
[:octicons-file-code-24: Source][2] ·
|
||
[:octicons-cpu-24: Plugin][3] ·
|
||
[:octicons-heart-fill-24:{: .tx-heart } Insiders – improved user experience][4]{: .tx-insiders }
|
||
|
||
The [built-in search plugin][3] integrates seamlessly with Material for MkDocs,
|
||
adding multilingual client-side search with [lunr][5] and [lunr-languages][6].
|
||
It's enabled by default, but must be re-added to `mkdocs.yml` when other plugins
|
||
are used:
|
||
|
||
``` yaml
|
||
plugins:
|
||
- search
|
||
```
|
||
|
||
The following options are supported:
|
||
|
||
`lang`{: #lang }
|
||
|
||
: :octicons-milestone-24: Default: _automatically set_ – This option allows
|
||
to include the language-specific stemmers provided by [lunr-languages][6].
|
||
Note that Material for MkDocs will set this automatically based on the
|
||
[site language][7], but it may be overridden, e.g. to support multiple
|
||
languages:
|
||
|
||
=== "A single language"
|
||
|
||
``` yaml
|
||
plugins:
|
||
- search:
|
||
lang: ru
|
||
```
|
||
|
||
=== "Multiple languages"
|
||
|
||
``` yaml
|
||
plugins:
|
||
- search:
|
||
lang:
|
||
- en
|
||
- ru
|
||
```
|
||
|
||
The following languages are supported:
|
||
|
||
<ul class="tx-columns">
|
||
<li><code>ar</code> – Arabic</li>
|
||
<li><code>da</code> – Danish</li>
|
||
<li><code>du</code> – Dutch</li>
|
||
<li><code>en</code> – English</li>
|
||
<li><code>fi</code> – Finnish</li>
|
||
<li><code>fr</code> – French</li>
|
||
<li><code>de</code> – German</li>
|
||
<li><code>hu</code> – Hungarian</li>
|
||
<li><code>it</code> – Italian</li>
|
||
<li><code>ja</code> – Japanese</li>
|
||
<li><code>no</code> – Norwegian</li>
|
||
<li><code>pt</code> – Portuguese</li>
|
||
<li><code>ro</code> – Romanian</li>
|
||
<li><code>ru</code> – Russian</li>
|
||
<li><code>es</code> – Spanish</li>
|
||
<li><code>sv</code> – Swedish</li>
|
||
<li><code>th</code> – Thai</li>
|
||
<li><code>tr</code> – Turkish</li>
|
||
<li><code>vi</code> – Vietnamese</li>
|
||
</ul>
|
||
|
||
_Material for MkDocs also tries to support languages that are not part of
|
||
this list by choosing the stemmer yielding the best result automatically_.
|
||
|
||
!!! warning "Only specify the languages you really need"
|
||
|
||
Be aware that including support for other languages increases the general
|
||
JavaScript payload by around 20kb (before `gzip`) and by another 15-30kb
|
||
per language.
|
||
|
||
`separator`{: #separator }
|
||
|
||
: :octicons-milestone-24: Default: _automatically set_ – The separator for
|
||
indexing and query tokenization can be customized, making it possible to
|
||
index parts of words separated by other characters than whitespace and `-`,
|
||
e.g. by including `.`:
|
||
|
||
``` yaml
|
||
plugins:
|
||
- search:
|
||
separator: '[\s\-\.]+'
|
||
```
|
||
|
||
`prebuild_index`{: #prebuild-index }
|
||
|
||
: :octicons-milestone-24: Default: `false` · :octicons-beaker-24:
|
||
Experimental – MkDocs can generate a [prebuilt index][8] of all pages during
|
||
build time, which provides performance improvements at the cost of more
|
||
bandwidth, as it reduces the build time of the search index:
|
||
|
||
``` yaml
|
||
plugins:
|
||
- search:
|
||
prebuild_index: true
|
||
```
|
||
|
||
This may be beneficial for large documentation projects served with
|
||
appropriate headers, i.e. `Content-Encoding: gzip`, but benchmarking before
|
||
deployment is recommended.
|
||
|
||
_Material for MkDocs doesn't provide official support for the other options of
|
||
this plugin, so they may be supported but can also yield weird results. Use
|
||
them at your own risk._
|
||
|
||
[2]: https://github.com/squidfunk/mkdocs-material/tree/master/src/assets/javascripts/integrations/search
|
||
[3]: https://www.mkdocs.org/user-guide/configuration/#search
|
||
[4]: ../insiders.md
|
||
[5]: https://lunrjs.com
|
||
[6]: https://github.com/MihaiValentin/lunr-languages
|
||
[7]: changing-the-language.md#site-language
|
||
[8]: https://www.mkdocs.org/user-guide/configuration/#prebuild_index
|
||
|
||
### Highlighting search
|
||
|
||
[:octicons-file-code-24: Source][4] ·
|
||
:octicons-unlock-24: Feature flag ·
|
||
:octicons-beaker-24: Experimental ·
|
||
[:octicons-heart-fill-24:{: .tx-heart } Insiders only][4]{: .tx-insiders }
|
||
|
||
When _search highlighting_ is activated and a user clicks on a search result,
|
||
Material for MkDocs will highlight all occurrences after following the link.
|
||
It can be enabled via `mkdocs.yml` with:
|
||
|
||
``` yaml
|
||
theme:
|
||
features:
|
||
- search.highlight
|
||
```
|
||
|
||
Searching for `"code blocks"` yields:
|
||
|
||
[![Search highlighting][9]][9]
|
||
|
||
_Give this feature a try on [the official documentation][10] built with Material
|
||
for MkDocs Insiders!_
|
||
|
||
[9]: ../assets/screenshots/search-highlighting.png
|
||
[10]: https://squidfunk.github.io/mkdocs-material-insiders/reference/code-blocks/?h=code+blocks
|
||
|
||
### Offline search
|
||
|
||
[:octicons-file-code-24: Source][11] ·
|
||
[:octicons-cpu-24: Plugin][12] · :octicons-beaker-24: Experimental
|
||
|
||
If you distribute your documentation as `*.html` files, the built-in search
|
||
will not work out-of-the-box due to the restrictions modern browsers impose for
|
||
security reasons. This can be mitigated with the [localsearch][12] plugin in
|
||
combination with @squidfunk's [iframe-worker][13] polyfill.
|
||
|
||
For setup instructions, refer to the [official documentation][14].
|
||
|
||
[11]: https://github.com/squidfunk/mkdocs-material/blob/master/src/base.html#L381-L393
|
||
[12]: https://github.com/wilhelmer/mkdocs-localsearch/
|
||
[13]: https://github.com/squidfunk/iframe-worker
|
||
[14]: https://github.com/wilhelmer/mkdocs-localsearch#installation-material-v5
|
||
|
||
## Customization
|
||
|
||
The search implementation of Material for MkDocs is probably its most
|
||
sophisticated feature, as it tries to balance a _great typeahead experience_,
|
||
_good performance_, _accessibility_, and a result list that is _easy to scan_.
|
||
This is where Material for MkDocs deviates from other themes.
|
||
|
||
The following section explains how search can be customized to tailor it to
|
||
your needs.
|
||
|
||
### Query transformation
|
||
|
||
[:octicons-file-code-24: Source][15] ·
|
||
:octicons-mortar-board-24: Difficulty: _easy_
|
||
|
||
When a user enters a query into the search box, the query is pre-processed
|
||
before it is submitted to the search index. Material for MkDocs will apply the
|
||
following transformations, which can be customized by [extending the theme][16]:
|
||
|
||
``` ts
|
||
/**
|
||
* Default transformation function
|
||
*
|
||
* 1. Search for terms in quotation marks and prepend a `+` modifier to denote
|
||
* that the resulting document must contain all terms, converting the query
|
||
* to an `AND` query (as opposed to the default `OR` behavior). While users
|
||
* may expect terms enclosed in quotation marks to map to span queries, i.e.
|
||
* for which order is important, `lunr` doesn't support them, so the best
|
||
* we can do is to convert the terms to an `AND` query.
|
||
*
|
||
* 2. Replace control characters which are not located at the beginning of the
|
||
* query or preceded by white space, or are not followed by a non-whitespace
|
||
* character or are at the end of the query string. Furthermore, filter
|
||
* unmatched quotation marks.
|
||
*
|
||
* 3. Trim excess whitespace from left and right.
|
||
*
|
||
* @param query - Query value
|
||
*
|
||
* @return Transformed query value
|
||
*/
|
||
export function defaultTransform(query: string): string {
|
||
return query
|
||
.split(/"([^"]+)"/g) /* => 1 */
|
||
.map((terms, index) => index & 1
|
||
? terms.replace(/^\b|^(?![^\x00-\x7F]|$)|\s+/g, " +")
|
||
: terms
|
||
)
|
||
.join("")
|
||
.replace(/"|(?:^|\s+)[*+\-:^~]+(?=\s+|$)/g, "") /* => 2 */
|
||
.trim() /* => 3 */
|
||
}
|
||
```
|
||
|
||
If you want to switch to the default behavior of the `mkdocs` or `readthedocs`
|
||
template, both of which don't transform the query prior to submission, or
|
||
customize the `transform` function, you can do this by [overriding the
|
||
`config` block][17]:
|
||
|
||
``` html
|
||
{% block config %}
|
||
<script>
|
||
var search = {
|
||
transform: function(query) {
|
||
return query
|
||
}
|
||
}
|
||
</script>
|
||
{% endblock %}
|
||
```
|
||
|
||
The `transform` function will receive the query string as entered by the user
|
||
and must return the processed query string to be submitted to the search index.
|
||
|
||
[15]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/transform/index.ts
|
||
[16]: ../customization.md#extending-the-theme
|
||
[17]: ../customization.md#overriding-blocks
|
||
|
||
### Custom search
|
||
|
||
[:octicons-file-code-24: Source][18] ·
|
||
:octicons-mortar-board-24: Difficulty: _challenging_
|
||
|
||
Material for MkDocs implements search as part of a [web worker][19]. If you
|
||
want to switch the web worker with your own implementation, e.g. to submit
|
||
search to an external service, you can add a custom JavaScript file to the `docs`
|
||
directory and [override the `config` block][17]:
|
||
|
||
``` html
|
||
{% block config %}
|
||
<script>
|
||
var search = {
|
||
worker: "<url>"
|
||
}
|
||
</script>
|
||
{% endblock %}
|
||
```
|
||
|
||
Communication with the search worker is implemented using a standardized
|
||
message format using _discriminated unions_, i.e. through the `type` property
|
||
of the message. See the following interface definitions to learn about the
|
||
message formats:
|
||
|
||
* [:octicons-file-code-24: `SearchMessage`][20]
|
||
* [:octicons-file-code-24: `SearchIndex` and `SearchResult`][21]
|
||
|
||
The sequence and direction of messages is rather intuitive:
|
||
|
||
* :octicons-arrow-right-24: `SearchSetupMessage`
|
||
* :octicons-arrow-left-24: `SearchReadyMessage`
|
||
* :octicons-arrow-right-24: `SearchQueryMessage`
|
||
* :octicons-arrow-left-24: `SearchResultMessage`
|
||
|
||
[18]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/worker
|
||
[19]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers
|
||
[20]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/worker/message/index.ts
|
||
[21]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/_/index.ts
|