Obtaining an original SVG viewBox via javascript

Question

Our system loads SVG files programmatically into HTML via AJAX. A typical SVG file begins with:

Answer 1

1. Go to http://phrogz.net/SVG/svg_in_xhtml5.xhtml
2. Open your web browser console

3. Type the code:

   var svg = document.querySelector('svg');
   var box = svg.getAttribute('viewBox');
   box.split(/\s+|,/);
   

4. Observe the glorious response:

   ["-350", "-250", "700", "500"]
   

5. Alternatively, type the code:

   var box = svg.viewBox.baseVal;
   [ box.x, box.y, box.width, box.height ]
   

6. Observe the glorious response:

   [ -350, -250, 700, 500 ]
   

In other words: yes, you can get the viewBox from the DOM, both as a standard DOM 2 attribute as well as an explicit ECMASCript binding.