Maint: do not use document.write

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/navbar-logo.html

@@ -19,16 +19,17 @@
   {# use alt_text if given. If not, only add alt text if no additional branding text given. #}
   {% set alt = theme_logo.get("alt_text", "" if theme_logo.get("text") else "%s - Home" % docstitle) %}
   {% if is_logo %}
-    {# Theme switching is only available when JavaScript is enabled.
-     # Thus we should add the extra image using JavaScript, defaulting
-     # depending on the value of default_mode; and light if unset.
+    {#
+       Theme switching is only available when JavaScript is enabled.
+       We thus adds elements that should be present only when javscipt is
+       enabled with a pst-js-only class
      #}
     {% if default_mode is undefined or default_mode == "auto" %}
       {% set default_mode = "light" %}
     {% endif %}
     {% set js_mode = "light" if default_mode == "dark" else "dark" %}
     <img src="{{ theme_logo['image_relative'][default_mode] }}" class="logo__image only-{{ default_mode }}" alt="{{ alt }}"/>
-    <script>document.write(`<img src="{{ theme_logo['image_relative'][js_mode] }}" class="logo__image only-{{ js_mode }}" alt="{{ alt }}"/>`);</script>
+    <img src="{{ theme_logo['image_relative'][js_mode] }}" class="logo__image only-{{ js_mode }} pst-js-only" alt="{{ alt }}"/>
   {% endif %}
   {% if not is_logo or theme_logo.get("text") %}
     <p class="title logo__title">{{ theme_logo.get("text") or docstitle }}</p>

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/search-button-field.html

@@ -1,11 +1,10 @@
 {# Displays a search field image that opens a search overlay when clicked. #}
-{# As this function will only work when JavaScript is enabled, we add it through JavaScript. #}
- <script>
- document.write(`
-   <button class="btn search-button-field search-button__button" title="{{ _('Search') }}" aria-label="{{ _('Search') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
-    <i class="fa-solid fa-magnifying-glass"></i>
-    <span class="search-button__default-text">{{ _('Search') }}</span>
-    <span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd class="kbd-shortcut__modifier">K</kbd></span>
-   </button>
- `);
- </script>
+{# 
+    As this function will only work when JavaScript is enabled,
+    we add a class that will hide it if js is disable.
+#}
+<button class="btn search-button-field search-button__button pst-js-only" title="{{ _('Search') }}" aria-label="{{ _('Search') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
+ <i class="fa-solid fa-magnifying-glass"></i>
+ <span class="search-button__default-text">{{ _('Search') }}</span>
+ <span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd class="kbd-shortcut__modifier">K</kbd></span>
+</button>

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/search-button.html

@@ -1,9 +1,6 @@
 {# Displays a magnifying glass icon that opens a search overlay when clicked. #}
-{# As this function will only work when JavaScript is enabled, we add it through JavaScript. #}
-<script>
-document.write(`
-  <button class="btn btn-sm pst-navbar-icon search-button search-button__button" title="{{ _('Search') }}" aria-label="{{ _('Search') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
+{# As this function will only work when JavaScript is enabled, we hide it with pst-js-only #}
+<button class="btn btn-sm pst-navbar-icon search-button search-button__button pst-js-only" title="{{ _('Search') }}" aria-label="{{ _('Search') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
     <i class="fa-solid fa-magnifying-glass fa-lg"></i>
-  </button>
+</button>
 `);
-</script>

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/theme-switcher.html

@@ -1,11 +1,7 @@
 {# Displays an icon to switch between light mode, dark mode, and auto (use browser's setting). #}
-{# As the theme switcher will only work when JavaScript is enabled, we add it through JavaScript. #}
-<script>
-document.write(`
-  <button class="btn btn-sm nav-link pst-navbar-icon theme-switch-button" title="{{ _('light/dark') }}" aria-label="{{ _('light/dark') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
-    <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light"></i>
-    <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark"></i>
-    <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto"></i>
-  </button>
-`);
-</script>
+{# As the theme switcher will only work when JavaScript is enabled, we hide it with `pst-js-only`. #}
+<button class="btn btn-sm nav-link pst-navbar-icon theme-switch-button pst-js-only" title="{{ _('light/dark') }}" aria-label="{{ _('light/dark') }}" data-bs-placement="bottom" data-bs-toggle="tooltip">
+  <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light"></i>
+  <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark"></i>
+  <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto"></i>
+</button>

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/components/version-switcher.html

@@ -1,26 +1,22 @@
 {# Displays a dropdown box for switching among different versions of your documentation. #}
 {%- set button_id = unique_html_id("pst-version-switcher-button") -%}
 {%- set dropdown_id = unique_html_id("pst-version-switcher-list") -%}
-{# As the version switcher will only work when JavaScript is enabled, we add it through JavaScript. #}
-<script>
-document.write(`
-  <div class="version-switcher__container dropdown">
-    <button id="{{ button_id }}"
-      type="button"
-      class="version-switcher__button btn btn-sm dropdown-toggle"
-      data-bs-toggle="dropdown"
-      aria-haspopup="listbox"
-      aria-controls="{{ dropdown_id }}"
-      aria-label="Version switcher list"
-    >
-      Choose version  <!-- this text may get changed later by javascript -->
-      <span class="caret"></span>
-    </button>
-    <div id="{{ dropdown_id }}"
-      class="version-switcher__menu dropdown-menu list-group-flush py-0"
-      role="listbox" aria-labelledby="{{ button_id }}">
-      <!-- dropdown will be populated by javascript on page load -->
-    </div>
+{# As the version switcher will only work when JavaScript is enabled, we hide it with pst-js-only #}
+<div class="version-switcher__container dropdown pst-js-only">
+  <button id="{{ button_id }}"
+    type="button"
+    class="version-switcher__button btn btn-sm dropdown-toggle"
+    data-bs-toggle="dropdown"
+    aria-haspopup="listbox"
+    aria-controls="{{ dropdown_id }}"
+    aria-label="Version switcher list"
+  >
+    Choose version  <!-- this text may get changed later by javascript -->
+    <span class="caret"></span>
+  </button>
+  <div id="{{ dropdown_id }}"
+    class="version-switcher__menu dropdown-menu list-group-flush py-0"
+    role="listbox" aria-labelledby="{{ button_id }}">
+    <!-- dropdown will be populated by javascript on page load -->
   </div>
-`);
-</script>
+</div>

src/pydata_sphinx_theme/theme/pydata_sphinx_theme/layout.html

@@ -17,6 +17,15 @@
     document.documentElement.dataset.mode = localStorage.getItem("mode") || "{{ default_mode }}";
     document.documentElement.dataset.theme = localStorage.getItem("theme") || "{{ default_mode }}";
   </script>
+  <!-- 
+    this give us a css class that will be invisible only if js is disabled 
+  -->
+  <noscript>
+    <style>
+      .pst-js-only { display: none !important; }
+
+    </style>
+  </noscript>
   {{ _webpack.head_pre_assets() }}
   {{ _webpack.head_pre_icons() }}
   {{- css() }}

tests/test_build.py

@@ -184,7 +184,7 @@ def test_primary_logo_is_light_when_no_default_mode(sphinx_build_factory) -> Non
     index_html = sphinx_build.html_tree("index.html")
     navbar_brand = index_html.select(".navbar-brand")[0]
     assert navbar_brand.find("img", class_="only-light") is not None
-    assert navbar_brand.find("script", string=re.compile("only-dark")) is not None
+    assert navbar_brand.find("img", class_="only-dark") is not None
 
 
 def test_primary_logo_is_light_when_default_mode_is_set_to_auto(
@@ -199,7 +199,7 @@ def test_primary_logo_is_light_when_default_mode_is_set_to_auto(
     index_html = sphinx_build.html_tree("index.html")
     navbar_brand = index_html.select(".navbar-brand")[0]
     assert navbar_brand.find("img", class_="only-light") is not None
-    assert navbar_brand.find("script", string=re.compile("only-dark")) is not None
+    assert navbar_brand.find("img", class_="only-dark") is not None
 
 
 def test_primary_logo_is_light_when_default_mode_is_light(sphinx_build_factory) -> None:
@@ -212,7 +212,7 @@ def test_primary_logo_is_light_when_default_mode_is_light(sphinx_build_factory)
     index_html = sphinx_build.html_tree("index.html")
     navbar_brand = index_html.select(".navbar-brand")[0]
     assert navbar_brand.find("img", class_="only-light") is not None
-    assert navbar_brand.find("script", string=re.compile("only-dark")) is not None
+    assert navbar_brand.find("img", class_="only-dark") is not None
 
 
 def test_primary_logo_is_dark_when_default_mode_is_dark(sphinx_build_factory) -> None:
@@ -225,7 +225,7 @@ def test_primary_logo_is_dark_when_default_mode_is_dark(sphinx_build_factory) ->
     index_html = sphinx_build.html_tree("index.html")
     navbar_brand = index_html.select(".navbar-brand")[0]
     assert navbar_brand.find("img", class_="only-dark") is not None
-    assert navbar_brand.find("script", string=re.compile("only-light")) is not None
+    assert navbar_brand.find("img", class_="only-light") is not None
 
 
 def test_logo_missing_image(sphinx_build_factory) -> None:
@@ -805,8 +805,9 @@ def test_version_switcher_error_states(
     if url == "switcher.json":  # this should work
         index = sphinx_build.html_tree("index.html")
         switcher = index.select(".navbar-header-items")[0].find(
-            "script", string=re.compile(".version-switcher__container")
+            "div", class_="version-switcher__container"
         )
+        assert switcher is not None
         file_regression.check(
             switcher.prettify(), basename="navbar_switcher", extension=".html"
         )
@@ -826,11 +827,7 @@ def test_version_switcher_error_states(
 def test_theme_switcher(sphinx_build_factory, file_regression) -> None:
     """Regression test for the theme switcher button."""
     sphinx_build = sphinx_build_factory("base").build()
-    switcher = (
-        sphinx_build.html_tree("index.html")
-        .find(string=re.compile("theme-switch-button"))
-        .find_parent("script")
-    )
+    switcher = sphinx_build.html_tree("index.html").find(class_="theme-switch-button")
     file_regression.check(
         switcher.prettify(), basename="navbar_theme", extension=".html"
     )

tests/test_build/navbar_switcher.html

@@ -1,22 +1,11 @@
-<script>
- document.write(`
-  <div class="version-switcher__container dropdown">
-    <button id="pst-version-switcher-button-2"
-      type="button"
-      class="version-switcher__button btn btn-sm dropdown-toggle"
-      data-bs-toggle="dropdown"
-      aria-haspopup="listbox"
-      aria-controls="pst-version-switcher-list-2"
-      aria-label="Version switcher list"
-    >
-      Choose version  <!-- this text may get changed later by javascript -->
-      <span class="caret"></span>
-    </button>
-    <div id="pst-version-switcher-list-2"
-      class="version-switcher__menu dropdown-menu list-group-flush py-0"
-      role="listbox" aria-labelledby="pst-version-switcher-button-2">
-      <!-- dropdown will be populated by javascript on page load -->
-    </div>
-  </div>
-`);
-</script>
+<div class="version-switcher__container dropdown pst-js-only">
+ <button aria-controls="pst-version-switcher-list-2" aria-haspopup="listbox" aria-label="Version switcher list" class="version-switcher__button btn btn-sm dropdown-toggle" data-bs-toggle="dropdown" id="pst-version-switcher-button-2" type="button">
+  Choose version
+  <!-- this text may get changed later by javascript -->
+  <span class="caret">
+  </span>
+ </button>
+ <div aria-labelledby="pst-version-switcher-button-2" class="version-switcher__menu dropdown-menu list-group-flush py-0" id="pst-version-switcher-list-2" role="listbox">
+  <!-- dropdown will be populated by javascript on page load -->
+ </div>
+</div>

tests/test_build/navbar_theme.html

@@ -1,9 +1,8 @@
-<script>
- document.write(`
-  <button class="btn btn-sm nav-link pst-navbar-icon theme-switch-button" title="light/dark" aria-label="light/dark" data-bs-placement="bottom" data-bs-toggle="tooltip">
-    <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light"></i>
-    <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark"></i>
-    <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto"></i>
-  </button>
-`);
-</script>
+<button aria-label="light/dark" class="btn btn-sm nav-link pst-navbar-icon theme-switch-button pst-js-only" data-bs-placement="bottom" data-bs-toggle="tooltip" title="light/dark">
+ <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light">
+ </i>
+ <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark">
+ </i>
+ <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto">
+ </i>
+</button>

tests/test_build/sidebar_subpage.html

@@ -33,15 +33,14 @@
   </div>
   <div class="sidebar-header-items__end">
    <div class="navbar-item">
-    <script>
-     document.write(`
-  <button class="btn btn-sm nav-link pst-navbar-icon theme-switch-button" title="light/dark" aria-label="light/dark" data-bs-placement="bottom" data-bs-toggle="tooltip">
-    <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light"></i>
-    <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark"></i>
-    <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto"></i>
-  </button>
-`);
-    </script>
+    <button aria-label="light/dark" class="btn btn-sm nav-link pst-navbar-icon theme-switch-button pst-js-only" data-bs-placement="bottom" data-bs-toggle="tooltip" title="light/dark">
+     <i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light">
+     </i>
+     <i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark">
+     </i>
+     <i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto">
+     </i>
+    </button>
    </div>
   </div>
  </div>