Javascript window.onresize事件从图表对象中删除d3数据

我已经创建了一个js构造函数来创建一个D3图表对象

该功能似乎在初始负载下工作。但是，我还添加了一个

onresize

侦听器，用于在resize上重新绘制图表

但是，当发生调整大小事件时，用于制作图表的数据的console.log（）会显示

日期

字段（第一个字段）全部为

空

。我没有成功地使用console.log来查找此更改实际发生的位置。在调整大小和运行图表绘制功能之前，数据似乎正常

这里有一个，作为完整的代码。调整视口大小时，图表将消失。控制台显示

myData

is

null

相关代码：

HTML

资料

调整日期列的大小时，日期列为all

null

JS

---

console

会引导您到达那里，因为

color

未定义？看不到代码。这是一个示例。JSFIDLE有完整的代码，很长。应该定义颜色，因为您正在尝试解析已解析的值。只需在构造函数中执行此操作，而不是在drawChart方法中。投票以“对未来的读者没有帮助”结束。我明白了。非常感谢。我没有意识到解析器改变了实际对象

var firstChart = new LineChart(myData,'chart-container','chart_area','This Is A Chart',["red","yellow","blue"],"temp","date")

        //Re draw on resize
        window.onresize = function(){

            firstChart.drawChart();
            console.log(myData);
        }

    var myData = [
    {"date":20111001,"New_York":63.4,"San_Francisco":62.7,"Austin":72.2},
    {"date":20111002,"New_York":58,"San_Francisco":59.9,"Austin":67.7},
    {"date":20111003,"New_York":53.3,"San_Francisco":59.1,"Austin":69.4},
    {"date":20111004,"New_York":55.7,"San_Francisco":58.8,"Austin":68},
    {"date":20111005,"New_York":64.2,"San_Francisco":58.7,"Austin":72.4},
    {"date":20111006,"New_York":58.8,"San_Francisco":57,"Austin":77},
    {"date":20111007,"New_York":57.9,"San_Francisco":56.7,"Austin":82.3},
    {"date":20111008,"New_York":61.8,"San_Francisco":56.8,"Austin":78.9},
    {"date":20111009,"New_York":69.3,"San_Francisco":56.7,"Austin":68.8},
    {"date":20111010,"New_York":71.2,"San_Francisco":60.1,"Austin":68.7},
    {"date":20111011,"New_York":68.7,"San_Francisco":61.1,"Austin":70.3},
    {"date":20111012,"New_York":61.8,"San_Francisco":61.5,"Austin":75.3},
    {"date":20111013,"New_York":63,"San_Francisco":64.3,"Austin":76.6},
    {"date":20111014,"New_York":66.9,"San_Francisco":67.1,"Austin":66.6},
    {"date":20111015,"New_York":61.7,"San_Francisco":64.6,"Austin":68},
    {"date":20111016,"New_York":61.8,"San_Francisco":61.6,"Austin":70.6},
    {"date":20111017,"New_York":62.8,"San_Francisco":61.1,"Austin":71.1},
    {"date":20111018,"New_York":60.8,"San_Francisco":59.2,"Austin":70},
    {"date":20111019,"New_York":62.1,"San_Francisco":58.9,"Austin":61.6},
    {"date":20111020,"New_York":65.1,"San_Francisco":57.2,"Austin":57.4},
    {"date":20111021,"New_York":55.6,"San_Francisco":56.4,"Austin":64.3}
]

function LineChart(data,chartContainerID,chartAreaId,chartTitle,colorArray,yaxisLabel,xaxisLabel,legend,yaxisFormat, marginsDict){

        this.data = data;
        this.chartContainer = document.getElementById(chartContainerID)
        this.chartArea = document.getElementById(chartAreaId);
        this.chartTitle = chartTitle;
        this.colors = colorArray;
        this.yaxisLabel=yaxisLabel;
        this.xaxisLabel=xaxisLabel;
        this.isLegend = legend;
        this.yaxisFormat= yaxisFormat;
        this.margins = marginsDict;

///....more code here in js fiddle.....


this.drawChart = function(){


///....more code here in js fiddle.....


///Console leads me here. more code above it
   var items = color.domain().map(function(name) {

          return {
            name: name,
            values: data.map(function(d) {
                console.log(d)
              return {
                date: d.date,
                result: +d[name]
              };
            })
          };
        });

///....more code here in js fiddle.....

}
}