ing">'lineWidth'</span>], <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-params">(box, lineWidth)</span> {</span>
          <span class="hljs-keyword">var</span> w = box.width,
              h = box.height,
              lines = svg.selectAll(<span class="hljs-string">'line'</span>).data([
                {x1: <span class="hljs-number">0</span>, y1: <span class="hljs-number">0</span>, x2: w, y2: h},
                {x1: <span class="hljs-number">0</span>, y1: h, x2: