Merge pull request #10 from prezly/feature/dev-11075-prezlycontent-re…

…nderer-reactjs-use-srcset-to-properly-size

Use explicit width for `srcSet` generation, allow generating srcSets without retina support

src/lib/UploadcareImage.ts

@@ -232,14 +232,15 @@ export class UploadcareImage {
     };
 
     public srcSet = (width: number): string => {
-        if (this.width < width * 2) {
-            return '';
-        }
-
+        const doubleWidth = width * 2;
         const src1x = this.resize(width).cdnUrl;
-        const src2x = this.resize(width * 2).cdnUrl;
+        const src2x = this.resize(doubleWidth).cdnUrl;
+
+        if (this.width < doubleWidth) {
+            return `${src1x} ${width}w`;
+        }
 
-        return `${src1x} 1x, ${src2x} 2x`;
+        return `${src1x} ${width}w, ${src2x} ${doubleWidth}w`;
     };
 
     public toPrezlyStoragePayload = (): UploadedImage => ({