diff --git a/Doxyfile b/Doxyfile
index 04b1d97df..42d00e31a 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -260,16 +260,20 @@ ALIASES                = \
     "requires_gl44=@xrefitem requires-gl44 \"Requires OpenGL 4.4\" \"Functionality requiring OpenGL 4.4\"" \
     "requires_gl45=@xrefitem requires-gl45 \"Requires OpenGL 4.5\" \"Functionality requiring OpenGL 4.5\"" \
     "requires_extension=@xrefitem requires-extension \"Requires OpenGL extension\" \"Functionality requiring specific OpenGL extension\"" \
-    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL (not available in OpenGL ES)\"" \
+    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL\"" \
     "extension{2}=<a href=\"http://www.opengl.org/registry/specs/\1/\2.txt\"><tt>\1_\2</tt></a>" \
     "extension2{2}=<a href=\"http://www.opengl.org/registry/specs/\1/\1_\2.txt\"><tt>\1_\2</tt></a>" \
     "extension3{3}=<a href=\"http://www.opengl.org/registry/specs/\1/\3.txt\"><tt>\1_\2</tt></a>" \
-    "requires_gles20=@xrefitem requires-gles20 \"Requires OpenGL ES 2.0\" \"Functionality requiring OpenGL ES 2.0 (not available in ES 3.0 and desktop OpenGL)\"" \
+    "requires_gles20=@xrefitem requires-gles20 \"Requires OpenGL ES 2.0 / WebGL 1.%\" \"Functionality requiring OpenGL ES 2.0 or WebGL 1.0\"" \
     "requires_gles30=@xrefitem requires-gles30 \"Requires OpenGL ES 3.0\" \"Functionality requiring OpenGL ES 3.0\"" \
     "requires_gles31=@xrefitem requires-gles31 \"Requires OpenGL ES 3.1\" \"Functionality requiring OpenGL ES 3.1\"" \
     "requires_es_extension=@xrefitem requires-es-extension \"Requires OpenGL ES extension\" \"Functionality requiring specific OpenGL ES extension\"" \
+    "requires_gles=@xrefitem requires-gles \"Requires OpenGL ES or desktop OpenGL\" \"Functionality requiring OpenGL ES or desktop OpenGL\"" \
+    "requires_webgl20=@xrefitem requires-webgl20 \"Requires WebGL 2.0\" \"Functionality requiring WebGL 2.0\"" \
+    "requires_webgl_extension=@xrefitem requires-webgl-extension \"Requires WebGL extension\" \"Functionality requiring specific WebGL extension\"" \
     "es_extension{2}=<a href=\"http://www.khronos.org/registry/gles/extensions/\1/\1_\2.txt\"><tt>\1_\2</tt></a>" \
     "es_extension2{3}=<a href=\"http://www.khronos.org/registry/gles/extensions/\1/\3.txt\"><tt>\1_\2</tt></a>" \
+    "webgl_extension{2}=<a href=\"https://www.khronos.org/registry/webgl/extensions/\1_\2/\"><tt>\1_\2</tt></a>" \
     "fn_al{1}=`al\1()`" \
     "def_al{1}=`AL_\1`"
 
diff --git a/doc/opengl.dox b/doc/opengl.dox
index c1138d16d..c4feef3f7 100644
--- a/doc/opengl.dox
+++ b/doc/opengl.dox
@@ -62,6 +62,9 @@ is supported on older Intel GPUs even if they are capable of OpenGL 2.1 only).
 -   @subpage requires-gles30
 -   @subpage requires-gles31
 -   @subpage requires-es-extension
+-   @subpage requires-gles
+-   @subpage requires-webgl20
+-   @subpage requires-webgl-extension
 
 @see @ref building, @ref cmake, @ref MAGNUM_TARGET_GLES,
     @ref MAGNUM_TARGET_GLES2
@@ -79,21 +82,37 @@ is supported on older Intel GPUs even if they are capable of OpenGL 2.1 only).
 
 @page requires-extension Functionality requiring specific OpenGL extension
 
-@page requires-gl Functionality requiring desktop OpenGL (not available on OpenGL ES)
+@page requires-gl Functionality requiring desktop OpenGL
+
+The following symbols are not defined when targeting OpenGL ES or WebGL.
+
 @see @ref MAGNUM_TARGET_GLES
 
-@page requires-gles20 Functionality requiring OpenGL ES 2.0 (not available on desktop or ES 3.0)
-@see @ref MAGNUM_TARGET_GLES2
+@page requires-gles20 Functionality requiring OpenGL ES 2.0 or WebGL 1.0
 
-@page requires-gles30 Functionality requiring at least OpenGL ES 3.0
+The following symbols are not defined when targeting OpenGL ES 3.0, WebGL 2.0
+or desktop OpenGL.
 
-The following symbols are not defined at all when targeting OpenGL ES 2.0.
+@see @ref MAGNUM_TARGET_GLES2
+
+@page requires-gles30 Functionality requiring OpenGL ES 3.0
 
 @see @ref MAGNUM_TARGET_GLES3
 
 @page requires-gles31 Functionality requiring OpenGL ES 3.1
 
+The following symbols are not defined when targeting OpenGL ES 2.0.
+
 @page requires-es-extension Functionality requiring specific OpenGL ES extension
-@see @ref MAGNUM_TARGET_GLES2
+
+@page requires-gles Functionality requiring OpenGL ES or desktop OpenGL
+
+The following symbols are not defined when targeting WebGL.
+
+@see @ref MAGNUM_TARGET_WEBGL, @ref requires-gl
+
+@page requires-webgl20 Functionality requiring WebGL 2.0
+
+@page requires-webgl-extension Functionality requiring specific WebGL extension
 
 */
diff --git a/src/Magnum/Magnum.h b/src/Magnum/Magnum.h
index bae122d0c..2bb6584f5 100644
--- a/src/Magnum/Magnum.h
+++ b/src/Magnum/Magnum.h
@@ -167,14 +167,14 @@ typedef std::int32_t Int;
 /**
 @brief Unsigned long (64bit)
 
-@attention 64-bit integers are not available in @ref MAGNUM_TARGET_WEBGL "WebGL".
+@requires_gles 64-bit integers are not available in WebGL.
 */
 typedef std::uint64_t UnsignedLong;
 
 /**
 @brief Signed long (64bit)
 
-@attention 64-bit integers are not available in @ref MAGNUM_TARGET_WEBGL "WebGL".
+@requires_gles 64-bit integers are not available in WebGL.
 */
 typedef std::int64_t Long;
 #endif
@@ -305,7 +305,7 @@ typedef Math::Range3D<Int> Range3Di;
 /** @{ @name Double-precision types
 
 See @ref types for more information.
-@requires_gl Only single-precision types are available in OpenGL ES.
+@requires_gl Only single-precision types are available in OpenGL ES and WebGL.
 */
 
 /** @brief Double (64bit) */
diff --git a/src/Magnum/Math/Angle.h b/src/Magnum/Math/Angle.h
index 7d4355fa7..79ea78849 100644
--- a/src/Magnum/Math/Angle.h
+++ b/src/Magnum/Math/Angle.h
@@ -156,7 +156,7 @@ Double cosine = Math::cos(60.0_deg);  // cosine = 0.5
 Double cosine = Math::cos(1.047_rad); // cosine = 0.5
 @endcode
 @see @link operator""_degf() @endlink, @link operator""_rad() @endlink
-@requires_gl Only single-precision types are available in OpenGL ES.
+@requires_gl Only single-precision types are available in OpenGL ES and WebGL.
 */
 constexpr Deg<Double> operator "" _deg(long double value) { return Deg<Double>(value); }
 #endif
@@ -210,7 +210,7 @@ template<class T> class Rad: public Unit<Rad, T> {
 
 See @link operator""_deg() @endlink for more information.
 @see @link operator""_radf() @endlink
-@requires_gl Only single-precision types are available in OpenGL ES.
+@requires_gl Only single-precision types are available in OpenGL ES and WebGL.
 */
 constexpr Rad<Double> operator "" _rad(long double value) { return Rad<Double>(value); }
 #endif