html - D3.js plot: SVG z-order of foreignelement not working in firefox -


i have basic svg scatter plot d3.js , want have output paragraph @ fixed position in plot. initially, paragraph shows basic usage text once user interacts plot, paragraph should show output includes html features such <sub> tags , special symbols.

i implemented paragraph foreignobject in svg of rather big size include initial text. works fine in safari , chrome, fails in firefox: foreignobject overlaps dots , makes impossible hover on them. idea how fix or how implement avoiding these issues?

see example code below or this bl.ock.org - remember works fine in safari doesn't work in firefox:

<!doctype html> <html lang="en"> <head>     <meta charset="utf-8">     <title>visualization</title>     <script type="text/javascript" src="https://rawgit.com/mbostock/d3/master/d3.min.js" charset="utf-8"></script>     <style media="screen" type="text/css">     .axis path,     .axis line {         fill: none;         stroke: black;         shape-rendering: crispedges     }      .axis text {         font-family: sans-serif;         font-size: 12px;     }      .clicktext {         font-family: sans-serif;         font-size: 11px;         text-align: left;     }     </style> </head> <body>      <script type="text/javascript">          /* test data set */         var dataset = [];          (var = 0; < 25; i++) {             dataset.push({x:math.random() * 30,y:math.random() * 30});         }          /* extend , plot sizes */              var w = 500;         var h = 300;         var dot;         var padding  = 60;         var def_c_sz = 5;          /* description text */         var pclick_txt = '<b>usage</b><br/>'+             '<br>text test text text test text<br/>'+             'text test text text test text text test text text test text text test text';          /* axes limits */         var x0  = 0.;         var x1  = 30.;         var y0  = 0;         var y1  = 30;          /* svg canvas plot */            var svg = d3.select('body').append('svg')             .attr('width',w)             .attr('height',h)             .attr('float','left');          /* scales */         var xscale = d3.scale.linear();         var yscale = d3.scale.linear();         xscale.range([padding,w-padding]).domain([x0,x1]);         yscale.range([h-padding,padding]).domain([y0,y1]);          /*  create axes , paragraph */         function addaxes(){              /* add output paragraph */                           pclick=svg.append("foreignobject")                 .attr("x",xscale(x0))                 .attr("y",yscale(y1))                 .attr("width", w)                 .attr("height",h)               .append("xhtml:body")               .append("p")                 .attr('class','clicktext label')                 .attr('style','background-color:rgba(125,125,125,0.75);padding:'+padding/5+'px;font-size:x-small;')                 .html(pclick_txt);               /* add x-axis */             var xaxis = d3.svg.axis()                 .orient('bottom')                 .scale(xscale);             xaxis.tickformat(d3.format('n'));              svg.append('g')                 .attr('class','axis')                 .attr('transform','translate(0,'+(h-padding)+')')                 .call(xaxis);              /* add y-axis */                         var yaxis = d3.svg.axis()                 .orient('left')                 .scale(yscale)             svg.append('g')                 .attr('class','axis')                 .attr('transform','translate('+(padding)+',0)')                 .call(yaxis);         }          circles = svg.selectall(".dots").data(dataset);         circlese = circles.enter().append("circle").attr("class","dots");         circlese             .attr("cx",function(d){return xscale(d.x)})             .attr("cy",function(d){return yscale(d.y)})             .attr("r",def_c_sz)             .attr("fill","orange")             .on("mouseover",mouseover)             .on("mouseout",mouseout);          /* call axes after dots have been drawn */         addaxes();          /* define callbacks */         function mouseover(d){              dot = d3.select(this);             dot.transition()                 .duration(100)                 .attr('r',2*def_c_sz);             pclick.attr('style','background-color:transparent;padding:'+0+'px;font-size:x-small;')                 .html(function(d){return '<b>y = '+dot.data()[0].y+'</b>'});         }          function mouseout(){              d3.select(this)                 .transition()                 .duration(700)                 .attr('r',def_c_sz);             pclick.attr('style','background-color:transparent;padding:'+0+'px;font-size:x-small;')                 .html('<b>not hovering :-(</b>');         }      </script> </body> </html>

if add attribute pointer-events="none" foreignobject element become transparent mouse clicks , you'll able hover dots. side effect won't able select text though.


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