不能悬停在path.area后面的点上

情况如下

代码如下:

let nix = crossfilter();
timeseriesFiltered.forEach(ts => {
          ndx.add(ts.values.map(function(d) {
            let temp = JSON.parse(JSON.stringify(objTemplate));
            temp[ts.place] = d.value;
            temp.date = new Date(d.timestamp);
            return temp;
          }));
        });
        let dimDate = ndx.dimension(dc.pluck('date'));
        let lineChartGroups = [];
        timeseriesFiltered.forEach((ts, index) => {
          let group = dimDate.group().reduceSum(dc.pluck(ts.place));
          let lineChart =  dc.lineChart(composite)
            .dimension(dimDate)
            .renderDataPoints(true)
            .renderArea(true)
            .defined(d => {
              return d.y != 0;
            })
            .colors(this.colors[index])
            .group(group, this.setName(ts.place));
          lineChartGroups.push(lineChart);
        })
        let chart = composite
          .width(width)
          .height(300)
          .margins({top: 30, right: 60, bottom: 30, left: 60})
          .x(d3.scaleTime().domain([new Date(minDate), new Date(maxDate)]))
          .yAxisLabel(timeseriesFiltered[0].unit)
          .elasticY(true)
          .mouseZoomable(true)
          .brushOn(false)
          .clipPadding(10)
          .legend(dc.legend().x(80).y(20).itemHeight(13).gap(5))
          ._rangeBandPadding(1)
          .compose(lineChartGroups);
          chart.render();

我们试图使用以下语句来提高所有圆点:

d3.selectAll('circle.dot').raise();

但没用。有什么建议吗?