title: Change stroke width of a svg image with click function jquery
body: <p>I want to increase the stroke width of a svg image by 0.5 when the user clicks on a button. I have the click function already, but not sure how to get the function to work to increase the stroke width.</p>
  
  <pre><code>function pipeScaleFactorPlus(){
      $(".pipe").style("stroke-width", "+=0.5");
  
    drawMapPipes();    
  }
  </code></pre>
  
  <p>.pipe is the svg class and the drawMapPipes(); is called to redraw the svg image. </p>