attempt at zoom slider

index.html

@@ -150,6 +150,19 @@
                     div_wrapper2.setAttribute('style', 'overflow-x: auto; overflow-y: auto;');
                     div_wrapper2.appendChild(div_wrapper);
 
+
+                    size_slider = document.createElement('input');
+                    size_slider.setAttribute('type', 'range');
+                    size_slider.setAttribute('min', window.innerWidth);
+                    size_slider.setAttribute('max', Math.ceil(width_px));
+                    size_slider.setAttribute('value', Math.ceil(width_px));
+                    size_slider.oninput = function() {
+                        div_wrapper.setAttribute('style', 'width: ' + Math.ceil(width_px) + 'px;');
+                        div_wrapper.style.width = Math.ceil(width_px) + 'px';
+                        div_wrapper.width = Math.ceil(width_px);
+                    }
+                    div.appendChild(size_slider);
+
                     div.appendChild(div_wrapper2);
                     div.appendChild(document.createElement('hr'));