SO Question

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
        font: 10px sans-serif;
    }

.axis path,
    .axis line {
        fill: none;
        stroke: #000;
        shape-rendering: crispEdges;
    }

.x.axis path {
        display: none;
    }

.line {
        fill: none;
        stroke: steelblue;
        stroke-width: 2px;
    }

rect {
        fill: #fff;
    }

</style>
<body>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.2/d3.js"></script>
<script>

var margin = {top: 15, right: 40, bottom: 20, left: 50},
            width = 960 - margin.left - margin.right,
            height = 240 - margin.top - margin.bottom;

var svg = d3.select("body").append("svg")
            .attr("width", width + margin.left + margin.right)
            .attr("height", height + margin.top + margin.bottom)
            .append("g")
            .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var clip = svg.append("defs").append("svg:clipPath")
            .attr("id", "clip")
            .append("svg:rect")
            .attr("id", "clip-rect")
            .attr("x", "0")
            .attr("y", "0")
            .attr("width", width)
            .attr("height", height);

var chartBody = svg.append("g")
            .attr("clip-path", "url(#clip)");

var rect = chartBody.append('svg:rect')
            .attr('width', width-20)
            .attr('height', height-20)
            .attr('fill', 'white');

var labeledRect = chartBody.append("rect")
            .attr("x", 0)
            .attr("y", 0)
            .attr("height", height-20)
            .attr("width", width-20)
            .style("stroke", "red")
            .attr("class", "labelbox")
            .style("fill", "none");

var closeArea = chartBody.append('text')
            .text('X')
            .attr("font-family", "sans-serif")
            .attr("font-size", "20px")
            .attr("fill", "red");
    labeledRect.append('text').attr('color','black').text('X');

</script>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.2/d3.js