fix syntax error and style

src/js/whiteboard.js

@@ -810,7 +810,7 @@ const whiteboard = {
                 '<div class="rotationHandle" style="position:absolute; bottom: -30px; left: 0px; width:100%; text-align:center; cursor:ew-resize;"><i class="fa fa-undo"></i></div>' +
                 "</div>"
         );
-	imgDiv.prepend(img)
+        imgDiv.prepend(img);
         imgDiv
             .find(".xCanvasBtn")
             .off("click")
@@ -895,14 +895,16 @@ const whiteboard = {
     },
     drawImgToBackground(url, width, height, left, top, rotationAngle) {
         const px = (v) => Number(v).toString() + "px";
-        this.imgContainer.append(this.imageWithSrc(url).css({
+        this.imgContainer.append(
+            this.imageWithSrc(url).css({
                 width: px(width),
                 height: px(height),
                 top: px(top),
                 left: px(left),
                 position: "absolute",
                 transform: "rotate(" + Number(rotationAngle) + "rad)",
-        });
+            })
+        );
     },
     addTextBox(
         textcolor,
@@ -1043,7 +1045,6 @@ const whiteboard = {
             .css({ "background-color": textboxBackgroundColor });
     },
     drawImgToCanvas(url, width, height, left, top, rotationAngle, doneCallback) {
-
         top = Number(top); // probably not as important here
         left = Number(left); // as it is when generating html
         width = Number(width);