Ninjablocks Diskspace Dashboard Widget (Designed for use with https://github.com/bacall213/ninja-diskspace) (Author: Brian Call) (License: MIT)

options.js

return {
  "name": "Ninja Diskspace",
  "deviceMap": [
    { "deviceId": 2000, "minimum": 1, "maximum": 1} // Sandbox device until more specific ID is availble
  ],
  "forceDeviceMapGroup": true
}

style.less

background: white;

h4 { 
  color: rgba(0,0,0,0.3);
  font-size: 15px;
  margin: 10px 10px;
}

.value {
  position: absolute;
  top: 50px;
  width: 100%;
  text-align: center;
  font-size: 45px;
  font-weight: bold;
  left: 8px;
  
  .units {
    font-size: 14px;
    font-weight: normal;
    vertical-align: super;
    position: relative;
    top: -10px;
  }
}

.sparkline {
  position: relative;
  top: 100px;
  width: 90%;
  height: 95px;
  margin-left: auto;
  margin-right: auto;
  line-height: 30px;
  border: 1px solid hsl(0,0%,90%);
  background: hsl(0,0%,95%);
  
  canvas {
    width: 100%;
    height: 85px;  
  }
}

.diskspace {
  color: hsl(45,100%,45%);
}

view.html

<div class="diskspace">
  <div class="value">
    <span class="text"></span>
    <sup class="units">%</sup>
  </div>
  <div class="sparkline"></div>
</div>

widget.js

var sparkDisk = element.find(".diskspace .sparkline");

var dataDisk = [];

var sparklineOptions = {
  width: '100%',
  height: '95px',
  chartRangeMin: 0,
  chartRangeMax: 100,
  chartRangeMinX: 0,
  drawNormalOnTop: false,
  //fillColor: 'hsla(360,100%,100%,1.0)',
  fillColor: null,
  tooltipFormat: '<span style="color: {{color}}">&#9679;</span> {{y}}%'
};

function SetDisk(value) {
  element.find(".diskspace .value .text").html(value);
  dataDisk.push(value);
  sparkDisk.sparkline(dataDisk, sparklineOptions);
};

scope.onData = function(data) {
  var diskVal = data.DA.split('%');
  SetDisk(diskVal[0]);
};

scope.Widget.settings.name = _.find(scope.Widget.devices, function(device) { return true; }).shortName;