cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
              @import url(https://fonts.googleapis.com/css?family=Ubuntu);
@import url(https://fonts.googleapis.com/css?family=Roboto);

html,
body {
  overflow: hidden;
  margin: 0;
  padding: 0;
  height: 100%
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #111;
}

svg {
  // outline: 1px dashed white;
}
            
          
!
            
              (function () {
  var
  utils    = window.utilities,
  identity = function(v){return v;};

  var
  PROP_EL     = '_el',
  PROP_SVG    = '_svg',
  PROP_DATA   = '_data',
  PROP_WIDTH  = '_width',
  PROP_HEIGHT = '_height',
  PROP_BAR_SPACING   = '_barSpacing',
  PROP_DPROP_LOW     = '_propertyLow',
  PROP_DPROP_HIGH    = '_propertyHigh',
  PROP_DPROP_VOL     = '_propertyVolume',
  PROP_DPROP_DATE    = '_propertyDate',
  PROP_DPROP_CLOSE   = '_propertyClose',
  PROP_DPROP_OPEN    = '_propertyOpen',
  PROP_MAR_CANDLE    = '_marginCandle',
  PROP_MAR_VOLUME    = '_marginVolume',
  PROP_COL_CANDBG    = '_colorCandleBackground',
  PROP_COL_BODYDN    = '_colorBodyDown',
  PROP_COL_BODYUP    = '_colorBodyUp',
  PROP_COL_STEMDN    = '_colorStemDown',
  PROP_COL_STEMUP    = '_colorStemUp',
  PROP_COL_VOLBG     = '_colorVolBackground',
  PROP_COL_VOLDN     = '_colorVolSell',
  PROP_COL_VOLUP     = '_colorVolBuy',
  PROP_COL_VOLDNBORD = '_colorVolSellBorder',
  PROP_COL_VOLUPBORD = '_colorVolBuyBorder',
  PROP_COL_LABTIMEBG = '_colorLabelTimeBackground',
  PROP_COL_LABTIMEFG = '_colorLabelTimeForeground',
  PROP_COL_LABCANBG  = '_colorLabelCandleBackground',
  PROP_COL_LABCANFG  = '_colorLabelCandleForeground',
  PROP_COL_LABVOLBG  = '_colorLabelVolumeBackground',
  PROP_COL_LABVOLFG  = '_colorLabelVolumeForeground',
  PROP_LAB_FAM       = '_labelFontFamily',
  PROP_LAB_SIZE      = '_labelFontSize';

  function D3CandleStickChart (el, props) {
    this[PROP_WIDTH]        = 320;
    this[PROP_HEIGHT]       = 240;
    this[PROP_DATA]          = [];

    if(window.d3 === undefined) {
      throw new Error('Unable to locate the d3 library');
    }

    props = utils.isPlainObject(props) ? props : {};

    // load any data in the props
    this.loadData(props.data);

    this.width  = props.width;
    this.height = props.height;
    this.parent = el || document.body;
    
    this[PROP_DPROP_LOW]     = props.propertyLow                || 'low';
    this[PROP_DPROP_HIGH]    = props.propertyHigh               || 'high';
    this[PROP_DPROP_VOL]     = props.propertyVolume             || 'volume';
    this[PROP_DPROP_DATE]    = props.propertyDate               || 'date';
    this[PROP_DPROP_CLOSE]   = props.propertyClose              || 'close';
    this[PROP_DPROP_OPEN]    = props.propertyOpen               || 'open';
    this[PROP_BAR_SPACING]   = props.barSpacing                 || 0.35;
    this[PROP_MAR_CANDLE]    = props.marginCandle               || 15;
    this[PROP_MAR_VOLUME]    = props.marginVolume               || 5;
    this[PROP_COL_CANDBG]    = props.colorCandleBackground      || '#111';
    this[PROP_COL_BODYDN]    = props.colorCandleBodyDown        || '#FF2121';
    this[PROP_COL_BODYUP]    = props.colorCandleBodyUp          || this[PROP_COL_CANDBG];
    this[PROP_COL_STEMDN]    = props.colorCandleStemDown        || this[PROP_COL_BODYDN];
    this[PROP_COL_STEMUP]    = props.colorCandleStemUp          || '#1BD31B';
    this[PROP_COL_VOLBG]     = props.colorVolumeSell            || '#222';
    this[PROP_COL_VOLDN]     = props.colorVolumeBuy             || this[PROP_COL_BODYDN];
    this[PROP_COL_VOLUP]     = props.colorVolumeSellBorder      || this[PROP_COL_VOLBG];
    this[PROP_COL_VOLDNBORD] = props.colorVolumeBuyBorder       || this[PROP_COL_BODYDN];
    this[PROP_COL_VOLUPBORD] = props.colorVolumeBackground      || this[PROP_COL_STEMUP];
    this[PROP_COL_LABTIMEBG] = props.colorLabelTimeBackground   || '#333';
    this[PROP_COL_LABTIMEFG] = props.colorLabelTimeForeground   || '#aaa';
    this[PROP_COL_LABCANBG]  = props.colorLabelCandleBackground || '#333';
    this[PROP_COL_LABCANFG]  = props.colorLabelCandleForeground || '#aaa';
    this[PROP_COL_LABVOLBG]  = props.colorLabelVolumeBackground || '#444';
    this[PROP_COL_LABVOLFG]  = props.colorLabelVolumeForeground || '#bbb';
    this[PROP_LAB_FAM]       = props.labelFontFamily            || 'Ubuntu';
    this[PROP_LAB_SIZE]      = props.labelFontSize              || 10;
  }

  function redrawIdent () {
    return function (val) {
      this.redraw(this.svg, this.data);
      return val;
    };
  }

  function redrawGetSetter (prop, allowNull) {
    return {
      get: utils.getter(prop),
      set: utils.setter(prop, allowNull, redrawIdent()),
    };
  }

  Object.defineProperties(D3CandleStickChart.prototype, {
    parent: { // auto-install if this gets changed.
      get: utils.getter(PROP_EL),
      set: utils.setter(PROP_EL, false, function (parent) {
        if (parent) {
          if (this.parent) { // un-install any previous charts in parent
            this.uninstall(this.parent);
          }
          return this.install(parent);
        }

        return this.parent;
      })
    },
    svg: {
      get: utils.getter(PROP_SVG)
    },
    width: {
      get: utils.getter(PROP_WIDTH),
      set: utils.setterInt(PROP_WIDTH, 0)
    },
    height: {
      get: utils.getter(PROP_HEIGHT),
      set: utils.setterInt(PROP_HEIGHT, 0)
    },
    aspectRatio: {
      get: function () {
        return this.height / this.width;
      }
    },
    data: {
      get: utils.getter(PROP_DATA)
    },

    propertyLow:                 redrawGetSetter(PROP_DPROP_LOW),
    propertyHigh:                redrawGetSetter(PROP_DPROP_HIGH),
    propertyVolume:              redrawGetSetter(PROP_DPROP_VOL),
    propertyDate:                redrawGetSetter(PROP_DPROP_DATE),
    propertyClose:               redrawGetSetter(PROP_DPROP_CLOSE),
    propertyOpen:                redrawGetSetter(PROP_DPROP_OPEN),
    barSpacing:                  redrawGetSetter(PROP_BAR_SPACING),
    marginCandle:                redrawGetSetter(PROP_MAR_CANDLE),
    marginVolume:                redrawGetSetter(PROP_MAR_VOLUME),
    colorCandleBackground:       redrawGetSetter(PROP_COL_CANDBG),
    colorCandleBodyDown:         redrawGetSetter(PROP_COL_BODYDN),
    colorCandleBodyUp:           redrawGetSetter(PROP_COL_BODYUP),
    colorCandleStemDown:         redrawGetSetter(PROP_COL_STEMDN),
    colorCandleStemUp:           redrawGetSetter(PROP_COL_STEMUP),
    colorVolumeSell:             redrawGetSetter(PROP_COL_VOLDN),
    colorVolumeBuy:              redrawGetSetter(PROP_COL_VOLUP),
    colorVolumeSellBorder:       redrawGetSetter(PROP_COL_VOLDNBORD),
    colorVolumeBuyBorder:        redrawGetSetter(PROP_COL_VOLUPBORD),
    colorVolumeBackground:       redrawGetSetter(PROP_COL_VOLBG),
    colorLabelTimeBackground:    redrawGetSetter(PROP_COL_LABTIMEBG),
    colorLabelTimeForeground:    redrawGetSetter(PROP_COL_LABTIMEFG),
    colorLabelCandleBackground:  redrawGetSetter(PROP_COL_LABCANBG),
    colorLabelCandleForeground:  redrawGetSetter(PROP_COL_LABCANFG),
    colorLabelVolumeBackground:  redrawGetSetter(PROP_COL_LABVOLBG),
    colorLabelVolumeForeground:  redrawGetSetter(PROP_COL_LABVOLFG),
    labelFontFamily:             redrawGetSetter(PROP_LAB_FAM),
    labelFontSize:               redrawGetSetter(PROP_LAB_SIZE)
  });

  D3CandleStickChart.low = function (prev, next) {
    if(prev === null) return next;
    return (next===null) ? prev : Math.min(prev, next);
  };

  D3CandleStickChart.high = function (prev, next) {
    if(prev === null) return next;
    return (next===null) ? prev : Math.max(prev, next);
  };

  D3CandleStickChart.dateMS = function (v) {
    if(v instanceof Date) return v.getTime();
    if(typeof v === 'string') {
      var ms = Date.parse(v);
      if(isNaN(ms)) return null;
      return ms;
    }
    if(typeof v === 'number'&&!isNaN(v)) return v;
    return null;
  };

  D3CandleStickChart.lowDate = function (prev, next) {
    return D3CandleStickChart.low(prev, D3CandleStickChart.dateMS(next));
  };

  D3CandleStickChart.highDate = function (prev, next) {
    return D3CandleStickChart.high(prev, D3CandleStickChart.dateMS(next));
  };

  D3CandleStickChart.dateSeriesMinutes = function (ms) {
    return moment(ms).format('mm:ss');
  };

  D3CandleStickChart.dateSeriesHours = function (ms) {
    return moment(ms).format('HH:mm');
  };

  D3CandleStickChart.dateSeriesDays = function (ms) {
    return moment(ms).format('MMM, DD');
  };

  D3CandleStickChart.dateSeriesMonths = function (ms) {
    return moment(ms).format('MMM, YYYY');
  };

  D3CandleStickChart.dateSeriesYears = function (ms) {
    return moment(ms).format('MMM, YYYY');
  };

  D3CandleStickChart.dateSeriesFunctionFromDiff = function (start, end) {
    var diff = Math.abs(D3CandleStickChart.dateMS(start) - D3CandleStickChart.dateMS(end));
    return (diff >= 3.1104e+10
      ? D3CandleStickChart.dateSeriesYears : (diff >= 2.592e+9
      ? D3CandleStickChart.dateSeriesMonths : (diff >= 1.728e+8
      ? D3CandleStickChart.dateSeriesDays : (diff >= 3.6e+6
      ? D3CandleStickChart.dateSeriesHours : D3CandleStickChart.dateSeriesMinutes
    ))));
  };

  D3CandleStickChart.getScales = function (data, spec) {
    spec = spec || {};
    var
    propLow  = spec.propertyLow    ||'low',
    propHigh = spec.propertyHigh   ||'high',
    propVol  = spec.propertyVolume ||'volume',
    propDate = spec.propertyDate   ||'date';

    return data.reduce(function (p, c) { // find all domains using a single data iteration (optimal)
      p.lowestLow   = D3CandleStickChart.low(p.lowestLow,     c[propLow]);
      p.highestHigh = D3CandleStickChart.high(p.highestHigh,  c[propHigh]);
      p.volumeLow   = D3CandleStickChart.low(p.volumeLow,     c[propVol]);
      p.volumeHigh  = D3CandleStickChart.high(p.volumeHigh,   c[propVol]);
      p.dateLow     = D3CandleStickChart.lowDate(p.dateLow,   c[propDate]);
      p.dateHigh    = D3CandleStickChart.highDate(p.dateHigh, c[propDate]);
      return p;
    }, { // seed the unprocessed domains
      lowestLow:   null,
      highestHigh: null,
      volumeLow:   null,
      volumeHigh:  null,
      dateLow:     null,
      dateHigh:    null
    });
  };

  D3CandleStickChart.prototype.resize = function (width, height, svg) {
    svg    = svg || this.svg;
    width  = width || this.width;
    height = height || this.height;

    svg.attr('width', width);
    svg.attr('height', height);

    if(width !== this.width) {
      this.width = width;
    }
    if(height !== this.height) {
      this.height = height;
    }

    return this;
  };

  D3CandleStickChart.prototype.clearData = function () {
    this.data.splice(0, this.data.length);
    this.reset();
    return true;
  };

  D3CandleStickChart.prototype.loadData = function (data) {
    if(!utils.isArray(data)) return false;
    Array.prototype.push.apply(this.data, data);
    if(this.parent) this.redraw();
    return true;
  };

  D3CandleStickChart.prototype.reset = function (svg) {
    svg = svg || this.svg;
    this.resetCandles(svg);
    this.resetVolume(svg);
    this.resetLabels(svg);
  };

  D3CandleStickChart.prototype.getScales = function (data) {
    return D3CandleStickChart.getScales(data || this.data, {
      propertyLow:    this.propertyLow,
      propertyHigh:   this.propertyHigh,
      propertyVolume: this.propertyVolume,
      propertyDate:   this.propertyDate
    });
  };

  D3CandleStickChart.prototype.coordCandles = function () {
    var
    volcoord = this.coordVolume();

    return {
      x: volcoord.x,
      y: 0,
      h: volcoord.y,
      w: volcoord.w
    };
  };

  D3CandleStickChart.prototype.resetCandles = function (svg) {
    svg.selectAll('g.candles').remove();
    return this;
  };

  D3CandleStickChart.prototype.redrawCandles = function (svg, scales) {
    var
    propLow       = this.propertyLow,
    propHigh      = this.propertyHigh,
    propVol       = this.propertyVolume,
    propDate      = this.propertyDate,
    propClose     = this.propertyClose,
    propOpen      = this.propertyOpen,
    colorBG       = this.colorCandleBackground,
    colorBodyDown = this.colorCandleBodyDown,
    colorBodyUp   = this.colorCandleBodyUp,
    colorStemDown = this.colorCandleStemDown,
    colorStemUp   = this.colorCandleStemUp,
    margin        = this.marginCandle || 0,
    coord = this.coordCandles(),
    approxW  = (coord.w / this.data.length),
    barSpace = approxW * this.barSpacing,
    barWidth = approxW - barSpace,
    stemWidth = barWidth * 0.15,
    group = svg.append('g')
      .attr('class', 'candles')
      .attr('transform', 'translate('+[coord.x, coord.y].join(' ') +')'),
    calcDateX = d3.scale.linear()
      .domain([scales.dateLow, scales.dateHigh])
        .range([0, coord.w - barWidth]),
    calcRY = d3.scale.linear()
      .domain([scales.lowestLow, scales.highestHigh])
        .range([coord.h - margin, margin]);

    if(stemWidth < 1)  {
      stemWidth = 1;
    }
    if(barWidth < 1)  {
      barWidth = 1;
    }

    group.append('rect')
      .attr('class', 'background')
      .attr('width', coord.w)
      .attr('height', coord.h)
      .attr('fill', colorBG);

    var
    dOpenCloseMin = function (d) { return Math.min(d[propClose], d[propOpen]); },
    dOpenCloseMax = function (d) { return Math.max(d[propClose], d[propOpen]); },
    dIsDown       = function (d) { return d[propClose] < d[propOpen]; },
    dStemColor    = function (d) { return dIsDown(d) ? colorStemDown : colorStemUp; },
    dBodyColor    = function (d) { return dIsDown(d) ? colorBodyDown : colorBodyUp; };

    if(stemWidth > 0) {
      group.selectAll('rect.candle-stem')
        .data(this.data)
        .enter().append('rect')
        .attr('class', 'candle-stem')
        .attr('width', stemWidth)
        .attr('x', function (d) { return calcDateX(d[propDate]) + ((barWidth/2) - (stemWidth/2)); })
        .attr('y', function (d) {
          return calcRY(d[propHigh]);
        })
        .attr('height', function (d) {
          return calcRY(d[propLow]) - calcRY(d[propHigh]);
        })
        .attr('fill', dStemColor);
    }

    group.selectAll('rect.candle-body')
      .data(this.data)
      .enter().append('rect')
      .attr('class', 'candle-body')
      .attr('width', barWidth)
      .attr('vmin', dOpenCloseMin)
      .attr('vmax', dOpenCloseMax)
      .attr('x', function (d) { return calcDateX(d[propDate]); })
      .attr('y', function (d) { return calcRY(this.getAttribute('vmax')); })
      .attr('height', function (d) {
        return calcRY(this.getAttribute('vmin'))-calcRY(this.getAttribute('vmax'));
      })
      .attr('stroke-width', 0.5)
      .attr('stroke-linecap', 'butt')
      .attr('stroke-rendering', 'crispEdges')
      .attr('stroke', dStemColor)
      .attr('fill', dBodyColor);

    return svg;
  };

  D3CandleStickChart.prototype.coordVolume = function () {
    var
    volheight = 100,
    coordlabels = this.coordLabels(),
    coordSX = coordlabels.seriesX;

    if(volheight / this.height > 0.25) {
      volheight = 50;
    }

    return {
      x: coordSX.x,
      y: coordSX.y - volheight,
      w: coordSX.w,
      h: volheight
    };
  };

  D3CandleStickChart.prototype.resetVolume = function (svg) {
    svg.selectAll('g.volume').remove();
    return this;
  };

  D3CandleStickChart.prototype.redrawVolume = function (svg, scales) {
    var
    coord              = this.coordVolume(),
    propVol            = this.propertyVolume,
    propDate           = this.propertyDate,
    propClose          = this.propertyClose,
    propOpen           = this.propertyOpen,
    colorVolSell       = this.colorVolumeSell,
    colorVolBuy        = this.colorVolumeBuy,
    colorVolSellBorder = this.colorVolumeSellBorder,
    colorVolBuyBorder  = this.colorVolumeBuyBorder,
    colorBG            = this.colorVolumeBackground,
    approxW            = (coord.w / this.data.length),
    barSpace           = approxW * this.barSpacing,
    barWidth           = approxW - barSpace,
    margin             = this.marginVolume || 0;

    if(barWidth < 1)  {
      barWidth = 1;
    }

    var
    group = svg.append('g')
      .attr('class', 'volume')
      .attr('transform', 'translate('+[coord.x, coord.y].join(' ') +')'),
    calcDateX = d3.scale.linear()
      .domain([scales.dateLow, scales.dateHigh])
        .range([0, coord.w - barWidth]),
    calcVolHeight = d3.scale.linear()
      .domain([scales.volumeLow, scales.volumeHigh])
        .range([2, coord.h - margin]),
    dIsDown        = function (d) { return d[propClose] < d[propOpen]; },
    dColorBars     = function (d) { return dIsDown(d) ? colorVolSell : colorVolBuy; },
    dColorBarsBord = function (d) { return dIsDown(d) ? colorVolSellBorder : colorVolBuyBorder; };

    group.append('rect')
      .attr('class', 'background')
      .attr('width', coord.w)
      .attr('height', coord.h)
      .attr('fill', colorBG);

    group.selectAll('rect.volume-bar')
      .data(this.data)
      .enter().append('rect')
      .attr('class', 'volume-bar')
      .attr('fill', dColorBars)
      .attr('stroke', dColorBarsBord)
      .attr('width', barWidth)
      .attr('stroke-width', 0.5)
      .attr('stroke-linecap', 'butt')
      .attr('stroke-rendering', 'crispEdges')
      .attr('height', function (d) {
        return calcVolHeight(d[propVol]);
      })
      .attr('x', function (d) {
        return calcDateX(d[propDate]);
      })
      .attr('y', function (d) {
        return (coord.h - this.getAttribute('height'));
      });

    return svg;
  };

  D3CandleStickChart.prototype.coordLabels = function () {
    var
    xheight = 20,
    ywidth  = 75;

    return {
      seriesX: {
        x: 0,
        y: this.height - xheight,
        w: this.width - ywidth,
        h: xheight
      },
      seriesY: {
        x: this.width - ywidth,
        y: 0,
        w: ywidth,
        h: this.height
      }
    };
  };

  D3CandleStickChart.prototype.resetLabels = function (svg) {
    svg.selectAll('g.labels').remove();
    return this;
  };

  D3CandleStickChart.prototype.redrawLabels = function (svg, scales) {
    var
    coord         = this.coordLabels(),
    coordvol      = this.coordVolume(),
    coordcand     = this.coordCandles(),
    fontFamily    = this.labelFontFamily,
    fontSize      = this.labelFontSize,
    colorTimeBG   = this.colorLabelTimeBackground,
    colorTimeFG   = this.colorLabelTimeForeground,
    colorCandleBG = this.colorLabelCandleBackground,
    colorCandleFG = this.colorLabelCandleForeground,
    colorVolumeBG = this.colorLabelVolumeBackground,
    colorVolumeFG = this.colorLabelVolumeForeground,
    marginCandle  = this.marginCandle || 0,
    marginVolume  = this.marginVolume || 0,
    cSX = coord.seriesX,
    cSY = coord.seriesY,
    groupY = svg.append('g')
      .attr('class', 'labels label-y')
      .attr('transform', 'translate('+[cSY.x, cSY.y].join(' ') +')'),
    groupX = svg.append('g')
      .attr('class', 'labels label-x')
      .attr('transform', 'translate('+[cSX.x, cSX.y].join(' ') +')'),

    // time series data & functions:
    timeticks = 10,
    dateX = d3.scale.linear()
      .domain([scales.dateLow, scales.dateHigh])
        .range([cSX.x, cSX.x + cSX.w]),

    // candle data & functions:
    candticks = 6,
    candY = d3.scale.linear()
      .domain([scales.lowestLow, scales.highestHigh])
        .range([coordcand.y + coordcand.h - marginCandle, coordcand.y + marginCandle]),

    // volume data & functions:
    volticks = 5,
    volY = d3.scale.linear()
      .domain([scales.volumeLow, scales.volumeHigh])
        .range([coordvol.y + coordvol.h, coordvol.y + fontSize + marginVolume]);

    groupX.append('rect') // placeholder for time-series labels
      .attr('width', cSX.w)
      .attr('height', cSX.h)
      .attr('fill', colorTimeBG);

    groupY.append('rect') // placeholder for X labels (end-cap)
     .attr('y', cSX.y)
     .attr('width', cSY.w)
     .attr('height', cSX.h)
     .attr('fill', colorTimeBG);

    groupX.selectAll('text.series-x')
      .data(dateX.ticks(timeticks))
      .enter().append('svg:text')
      .attr('class', 'series-x')
      .attr('x', dateX)
      .attr('y', 0)
      .attr('dy', (cSX.h/2)+(fontSize/2))
      .attr('font-family', fontFamily)
      .attr('font-size', fontSize)
      .attr('text-anchor', 'middle')
      .attr('fill', colorTimeFG)
      .text(D3CandleStickChart.dateSeriesFunctionFromDiff(scales.dateLow, scales.dateHigh));

    // candle labels
    groupY.append('rect') // background
      .attr('y', coordcand.y)
      .attr('width', cSY.w)
      .attr('height', coordcand.h)
      .attr('fill', colorCandleBG);

    groupY.selectAll('text.candle-label') // ticks
      .data(candY.ticks(candticks))
      .enter().append('text')
      .attr('class', 'candle-label')
      .attr('x', 0)
      .attr('y', candY)
      .attr('dx', cSY.w/2)
      // .attr('dy', fontSize/2)
      .attr('font-family', fontFamily)
      .attr('font-size', fontSize)
      .attr('text-anchor', 'middle')
      .attr('fill', colorCandleFG)
      .text(function (d) {
        return utils.isNumber(d) ? ( d < 1 ? d.toFixed(4) : d) : d;
      });

    // volume labels:
    groupY.append('rect') // background
      .attr('y', coordvol.y)
      .attr('width', cSY.w)
      .attr('height', coordvol.h)
      .attr('fill', colorVolumeBG);

    groupY.selectAll('text.vol-label') // ticks
      .data(volY.ticks(volticks))
      .enter().append('text')
      .attr('class', 'vol-label')
      .attr('x', 0)
      .attr('y', volY)
      .attr('dx', cSY.w/2)
      .attr('dy', 0)
      .attr('fill', colorVolumeFG)
      .attr('font-family', fontFamily)
      .attr('font-size', fontSize)
      .attr('text-anchor', 'middle')
      .text(String);

    return svg;
  };

  D3CandleStickChart.prototype.redraw = function (svg, data) {
    svg  = svg  || this.svg;
    data = data || this.data;

    // clear existing charted data
    this.reset(svg);

    if(!data.length) { // bail out if no data
      return svg;
    }

    // resize SVG to outer limits
    svg.attr('width', this.width);
    svg.attr('height', this.height);
    svg.attr('viewBox', '0 0 '+ this.width + ' ' + this.height);

    var
    /***** scales:
    * lowestLow
    * highestHigh
    * volumeLow
    * volumeHigh
    * dateLow
    * dateHigh
    *****/
    scales = this.getScales(data);

    this.redrawCandles(svg, scales);
    this.redrawVolume(svg, scales);
    this.redrawLabels(svg, scales);
  };

  D3CandleStickChart.prototype.initView = function (svg) {
    this.resize(this.width, this.height, svg);
    this.redraw(svg, this.data);
    return svg;
  };

  D3CandleStickChart.prototype.install = function (parent) {
    parent = parent || this.parent;
    if(!parent) {
      return false;
    }

    // set the parent's svg context
    this[PROP_SVG] = this.initView(d3.select(parent).append('svg:svg'));

    return parent;
  };

  D3CandleStickChart.prototype.uninstall = function (parent) {
    d3.select(parent||this.parent)
      .select('svg')
      .remove();

    return parent;
  };

  this.D3CandleStickChart = D3CandleStickChart;

}).call(this);

//
// Test code
//

(function (el) {
  if(!el) throw new Error('Unable to find main canvas.');

  var
  chart = new window.D3CandleStickChart(el, {}),

  // data loading stuff
  msPerSec  = 1000,
  pair      = 'BTC_BTS',
  period    = 14400,
  num       = 100,
  epocEnd   = Math.round(Date.now()/msPerSec),
  epocStart = Math.round(epocEnd - (period * num));

  function reloadData() {
    $.ajax({ // fetch some chart data
      url: 'https://poloniex.com/public?command=returnChartData&currencyPair='+pair+'&start='+epocStart+'&end='+epocEnd+'&period='+period,
      json: true,
      success: function (data) {
        chart.clearData();
        chart.loadData(data.map(function (record) {
          record.date *= msPerSec;
          return record;
        }));
      }
    });
  }

  reloadData();
  
  setInterval(reloadData, Math.round((period * msPerSec)/2));

  (window.onresize = function () {
    chart.resize(window.innerWidth, window.innerHeight);
    chart.redraw();
  })();

})(document.getElementById('main'))
            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.
Loading ..................

Console