Updated docs

README.md

@@ -279,35 +279,33 @@ The JS snippet must return an _image object_ or a Promise of an _image object_,
 
 * `width` in cm
 * `height` in cm
-* `thumbnail` _[optional]_: non-SVG image to use when SVG is not supported or shown in preview (only relevant when image is SVG). See example below.
 * `data`: either an ArrayBuffer or a base64 string with the image data
 * `extension`: e.g. `.png`
+* `thumbnail` _[optional]_: when injecting an SVG image, a fallback non-SVG (png/jpg/gif, etc.) image is necessary. This thumbnail is used when SVG images are not supported or when the document is previewed. See example below.
 
-Images can also be SVG. These needs a thumbnail (fallback) to be specified along with the image data.
-
-The SVG can be injected from a js context as shown below
+Injecting an SVG is slightly different than other images, as a `thumbnail` needs to be specified:
 
+In the .docx template:
 ```
 +++IMAGE injectSvg()+++
 ```
 
+In the `createReport` call:
 ```js
 additionalJsContext: {
   injectSvg: () => {
-      const data = Buffer.from(`<svg  xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+      const svg_data = Buffer.from(`<svg  xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
                                   <rect x="10" y="10" height="100" width="100" style="stroke:#ff0000; fill: #0000ff"/>
                                 </svg>`, 'utf-8');
-      return { width: 6, height: 6, data, extension: '.svg', thumbnail: './thumbnail.png' };                    
+      const thumbnail = {
+        data: fs.readFileSync('sample.png'),
+        extension: '.png',
+      };
+      return { width: 6, height: 6, data: svg_data, extension: '.svg', thumbnail };                    
     }
   }
 ```
 
-Or the svg can be given directly as a path:
-
-```
-+++IMAGE ({ width: 3, height: 3, path: './sample.svg', thumbnail: './thumb.png' })+++
-```
-
 ### `LINK`
 
 Includes a hyperlink with the data resulting from evaluating a JavaScript snippet: