Add non normative stuff

source

@@ -68751,15 +68751,18 @@ try {
   <hr>
 
   <p>There are three types of gradients, linear gradients, radial gradients, and conic gradients,
-  represented by objects implementing the opaque <code>CanvasGradient</code> interface.</p>
+  represented by objects implementing the <code>CanvasGradient</code> interface.</p>
 
   <p id="interpolation">Once a gradient has been created (see below), stops are placed along it to
   define how the colors are distributed along the gradient. <span w-nodev>The color of the
   gradient at each stop is the color specified for that stop. Between each such stop, the colors and
-  the alpha component must be linearly interpolated over the
-  <span data-x="ColorInterpolationMethod">ColorInterpolationMethod</span> color space to find the color to use at that offset. Color values are premultiplied by alpha if the <span data-x="canvas-gradient-premultipliedAlpha>premultipliedAlpha</span> value is true. For polar color spaces, hue is interpolated according to the <span data-x="HueInterpolationMethod">HueInterpolationMethod</span>. Before the first stop, the color must be the
-  color of the first stop. After the last stop, the color must be the color of the last stop. When
-  there are no stops, the gradient is <span>transparent black</span>.</span></p>
+  the alpha component must be linearly interpolated over the <span data-x="ColorInterpolationMethod">ColorInterpolationMethod</span>
+  color space to find the color to use at that offset. Color values are premultiplied by alpha
+  if the <span data-x="canvas-gradient-premultipliedAlpha">premultipliedAlpha</span>
+  value is true. For polar color spaces, hue is interpolated according to the
+  <span data-x="HueInterpolationMethod">HueInterpolationMethod</span>. Before the first stop, the
+  color must be the color of the first stop. After the last stop, the color must be the color of the
+  last stop. When there are no stops, the gradient is <span>transparent black</span>.</span></p>
 
   <dl class="domintro">
    <dt><code data-x=""><var>gradient</var>.<span subdfn data-x="dom-canvasgradient-addColorStop">addColorStop</span>(<var>offset</var>, <var>color</var>)</code></dt>
@@ -68790,10 +68793,36 @@ try {
     <code>DOMException</code> exception.</p>
    </dd>
 
-   <dt><code data-x=""><var>gradient</var> = <var>context</var>.<span subdfn data-x="dom-context-2d-createConicGradient">createConicGradient</span>(<var>startAngle</var>, <var>x</var>, <var>y</var>)</code></dt>
+   <dt><code data-x=""><var>gradient</var>.<span data-x="ColorInterpolationMethod">colorInterpolationMethod</span> [ = <var>value</var> ]</code></dt>
 
-   <dd><p>Returns a <code>CanvasGradient</code> object that represents a conic gradient that paints
-   clockwise along the rotation around the center represented by the arguments.</p></dd>
+   <dd>
+    <p>Returns the current color space used for interpolation.</p>
+
+    <p>Can be set, to change the <span data-x="ColorInterpolationMethod">colorInterpolationMethod</span>
+    color space.</p>
+
+    <p>The color space must be a string. Invalid values are ignored.</p>
+   </dd>
+
+   <dt><code data-x=""><var>gradient</var>.<span data-x="HueInterpolationMethod">hueInterpolationMethod</span> [ = <var>value</var> ]</code></dt>
+
+   <dd>
+    <p>Returns the current hue interpolation method.</p>
+
+    <p>Can be set, to change the <span data-x="HueInterpolationMethod">hueInterpolationMethod</span>.</p>
+
+    <p>The method must be a string. Invalid values are ignored.</p>
+   </dd>
+
+   <dt><code data-x=""><var>gradient</var>.<span data-x="canvas-gradient-premultipliedAlpha">premultipliedAlpha</span> [ = <var>value</var> ]</code></dt>
+
+   <dd>
+    <p>Returns true if the gradient will interpolate using <span data-x="concept-premultiplied-alpha">premultiplied alpha</span>.
+    Otherwise returns false.</p>
+
+    <p>Can be set, to change the <span data-x="canvas-gradient-premultipliedAlpha">premultipliedAlpha</span>
+    value.</p>
+   </dd>
   </dl>
 
   <div w-nodev>