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mkdocs-material/docs/setup/setting-up-site-search.md
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---
template: overrides/main.html
search:
boost: 1.05
---
# 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
not be compliant with privacy regulations. Moreover, search even works
[offline], allowing users to download your documentation.
[offline]: building-for-offline-usage.md
## Configuration
### Built-in search plugin
[:octicons-tag-24: 0.1.0][search support] ·
:octicons-cpu-24: Plugin
The built-in search plugin integrates seamlessly with Material for MkDocs,
adding multilingual client-side search with [lunr] and [lunr-languages]. It's
enabled by default, but must be re-added to `mkdocs.yml` when other plugins
are used:
``` yaml
plugins:
- search
```
The following configuration options are supported:
`lang`{ #search-lang }
: :octicons-milestone-24: Default: _automatically set_ This option allows
to include the language-specific stemmers provided by [lunr-languages].
Note that Material for MkDocs will set this automatically based on the
[site language], 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: # (1)!
- en
- ru
```
1. 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.
The following languages are supported:
<div class="mdx-columns" markdown>
- `ar` Arabic
- `da` Danish
- `de` German
- `du` Dutch
- `en` English
- `es` Spanish
- `fi` Finnish
- `fr` French
- `hu` Hungarian
- `it` Italian
- `ja` Japanese
- `no` Norwegian
- `pt` Portuguese
- `ro` Romanian
- `ru` Russian
- `sv` Swedish
- `th` Thai
- `tr` Turkish
- `vi` Vietnamese
</div>
Material for MkDocs goes to great lengths to support languages that are not
part of this list by automatically falling back to the stemmer yielding the
best result.
`separator`{ #search-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\-\.]' # (1)!
```
1. Tokenization itself is carried out by [lunr's default tokenizer], which
doesn't allow for lookahead or separators spanning multiple characters.
For more finegrained control over the tokenization process, see the
section on [tokenizer lookahead].
<div class="mdx-deprecated" markdown>
`prebuild_index`{ #search-prebuild-index }
: [:octicons-tag-24: 5.0.0][prebuilt index support] · :octicons-archive-24:
Deprecated · :octicons-trash-24: 8.0.0 · :octicons-milestone-24: Default:
`false` MkDocs can generate a [prebuilt index] 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
```
Note that this configuration option was removed, as the [new search
plugin] generates up to [50% smaller] search indexes, doubling search
performance.
[:octicons-arrow-right-24: Read more on the new search plugin]
[new search plugin]
</div>
The other configuration options of this plugin are not officially supported
by Material for MkDocs, which is why they may yield unexpected results. Use
them at your own risk.
[search support]: https://github.com/squidfunk/mkdocs-material/releases/tag/0.1.0
[lunr]: https://lunrjs.com
[lunr-languages]: https://github.com/MihaiValentin/lunr-languages
[lunr's default tokenizer]: https://github.com/olivernn/lunr.js/blob/aa5a878f62a6bba1e8e5b95714899e17e8150b38/lunr.js#L413-L456
[site language]: changing-the-language.md#site-language
[tokenizer lookahead]: #tokenizer-lookahead
[prebuilt index support]: https://github.com/squidfunk/mkdocs-material/releases/tag/5.0.0
[prebuilt index]: https://www.mkdocs.org/user-guide/configuration/#prebuild_index
[50% smaller]: ../blog/2021/search-better-faster-smaller.md#benchmarks
### Rich search previews
[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
[:octicons-tag-24: insiders-3.0.0][Insiders] ·
:octicons-beaker-24: Experimental
Insiders ships rich search previews as part of the [new search plugin], which
will render code blocks directly in the search result, and highlight all
occurrences inside those blocks:
=== "Insiders"
![search preview now]
=== "Material for MkDocs"
![search preview before]
[Insiders]: ../insiders/index.md
[new search plugin]: ../blog/2021/search-better-faster-smaller.md
[search preview now]: ../blog/2021/search-better-faster-smaller/search-preview-now.png
[search preview before]: ../blog/2021/search-better-faster-smaller/search-preview-before.png
### Tokenizer lookahead
[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
[:octicons-tag-24: insiders-3.0.0][Insiders] ·
:octicons-beaker-24: Experimental
Insiders allows for more complex configurations of the [`separator`][separator]
setting as part of the [new search plugin], yielding more influence on the way
documents are tokenized:
``` yaml
plugins:
- search:
separator: '[\s\-,:!=\[\]()"/]+|(?!\b)(?=[A-Z][a-z])|\.(?!\d)|&[lg]t;'
```
The following section explains what can be achieved with tokenizer lookahead:
=== "Case changes"
```
(?!\b)(?=[A-Z][a-z])
```
`PascalCase` and `camelCase` are used as naming conventions in many
programming languages. By adding this match group to the [`separator`]
[separator], [words are split at case changes], tokenizing the word
`PascalCase` into `Pascal` and `Case`, so both terms can be searched
individually.
[:octicons-arrow-right-24: Read more on tokenizing case changes]
[tokenize case changes]
=== "Version numbers"
```
\.(?!\d)
```
When `.` is added to the [`separator`][separator], version numbers would be
split into parts, rendering them undiscoverable via search. By adding
this match group, a small lookahead is introduced, so version numbers will
remain as they are, and can be found through search.
[:octicons-arrow-right-24: Read more on tokenizing version numbers]
[tokenize version numbers]
=== "HTML/XML tags"
```
&[lg]t;
```
If your documentation includes HTML/XML code examples, you may want to allow
users to find specific tag names. Unfortunately, the `<` and `>` control
characters are encoded in code blocks as `&lt;` and `&gt;`. Adding this
expression to the separator allows for just that.
[:octicons-arrow-right-24: Read more on tokenizing HTML/XML tags]
[tokenize html-xml tags]
[separator]: #search-separator
[words are split at case changes]: ?q=searchHighlight
[tokenize case changes]: ../blog/2021/search-better-faster-smaller.md#case-changes
[tokenize version numbers]: ../blog/2021/search-better-faster-smaller.md#version-numbers
[tokenize html-xml tags]: ../blog/2021/search-better-faster-smaller.md#htmlxml-tags
### Search suggestions
[:octicons-tag-24: 7.2.0][search.suggest support] ·
:octicons-unlock-24: Feature flag ·
:octicons-beaker-24: Experimental
When search suggestions are enabled, the search will display the likeliest
completion for the last word which can be accepted with the ++arrow-right++ key.
Add the following lines to `mkdocs.yml`:
``` yaml
theme:
features:
- search.suggest
```
Searching for [:octicons-search-24: search su][search.suggest example] yields
^^search suggestions^^ as a suggestion.
[search.suggest support]: https://github.com/squidfunk/mkdocs-material/releases/tag/7.2.0
[search.suggest example]: ?q=search+su
### Search highlighting
[:octicons-tag-24: 7.2.0][search.highlight support] ·
:octicons-unlock-24: Feature flag ·
:octicons-beaker-24: Experimental
When search highlighting is enabled and a user clicks on a search result,
Material for MkDocs will highlight all occurrences after following the link.
Add the following lines to `mkdocs.yml`:
``` yaml
theme:
features:
- search.highlight
```
Searching for [:octicons-search-24: code blocks][search.highlight example]
highlights all occurrences of both terms.
[search.highlight support]: https://github.com/squidfunk/mkdocs-material/releases/tag/7.2.0
[search.highlight example]: ../reference/code-blocks.md?h=code+blocks
### Search sharing
[:octicons-tag-24: 7.2.0][search.share support] ·
:octicons-unlock-24: Feature flag ·
:octicons-beaker-24: Experimental
When search sharing is activated, a :material-share-variant: share button is
rendered next to the reset button, which allows to deep link to the current
search query and result. Add the following lines to `mkdocs.yml`:
``` yaml
theme:
features:
- search.share
```
When a user clicks the share button, the URL is automatically copied to the
clipboard.
[search.share support]: https://github.com/squidfunk/mkdocs-material/releases/tag/7.2.0
## Usage
### Search boosting
[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
[:octicons-tag-24: insiders-2.8.0][Insiders]
When [Metadata] is enabled, pages can be boosted in search with custom front
matter, which will make them rank higher. Add the following lines at the top of
a Markdown file:
``` sh
---
search:
boost: 2 # (1)!
---
# Document title
...
```
1. :woman_in_lotus_position: When boosting pages, be gentle and start with
__low values__.
[Metadata]: extensions/python-markdown.md#metadata
### Search exclusion
[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
[:octicons-tag-24: insiders-3.1.0][Insiders] ·
:octicons-beaker-24: Experimental
When [Metadata] is enabled, pages can be excluded from search with custom front
matter, removing them from the index. Add the following lines at the top of a
Markdown file:
``` sh
---
search:
exclude: true
---
# Document title
...
```
#### Excluding sections
When [Attribute Lists] is enabled, specific sections of pages can be excluded
from search by adding the `{ data-search-exclude }` pragma after a Markdown
heading:
=== ":octicons-file-code-16: docs/page.md"
``` markdown
# Document title
## Section 1
The content of this section is included
## Section 2 { data-search-exclude }
The content of this section is excluded
```
=== ":octicons-codescan-16: search_index.json"
``` json
{
...
"docs": [
{
"location":"page/",
"text":"",
"title":"Document title"
},
{
"location":"page/#section-1",
"text":"<p>The content of this section is included</p>",
"title":"Section 1"
}
]
}
```
[Attribute Lists]: extensions/python-markdown.md#attribute-lists
#### Excluding blocks
When [Attribute Lists] is enabled, specific sections of pages can be excluded
from search by adding the `{ data-search-exclude }` pragma after a Markdown
inline- or block-level element:
=== ":octicons-file-code-16: docs/page.md"
``` markdown
# Document title
The content of this block is included
The content of this block is excluded
{ data-search-exclude }
```
=== ":octicons-codescan-16: search_index.json"
``` json
{
...
"docs": [
{
"location":"page/",
"text":"<p>The content of this block is included</p>",
"title":"Document title"
}
]
}
```
## 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
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]:
``` ts
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)! */
}
```
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.
If you want to switch to the default behavior of the `mkdocs` and `readthedocs`
themes, 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][overriding blocks]:
``` html
{% extends "base.html" %}
{% block config %}
{{ super() }}
<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.
[extending the theme]: ../customization.md#extending-the-theme
[overriding blocks]: ../customization.md#overriding-blocks
### Custom search
Material for MkDocs implements search as part of a [web worker]. 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][overriding blocks]:
``` html
{% extends "base.html" %}
{% block config %}
{{ super() }}
<script>
var __search = {
worker: "<url>"
}
</script>
{% endblock %}
```
Communication with the search worker is implemented using a designated 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`][SearchMessage]
- [:octicons-file-code-24: `SearchIndex` and `SearchResult`][SearchIndex]
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`
[web worker]: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers
[SearchMessage]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/worker/message/index.ts
[SearchIndex]: https://github.com/squidfunk/mkdocs-material/blob/master/src/assets/javascripts/integrations/search/_/index.ts