javascript - 从 React 中的 JSON 文件的空值中删除 Highcharts 柱形图中的间隙

Question

我想在 Highcharts 柱形图上按类别调整列，以便更正空值。下面的函数是由 Grzegorz 编写的，它就是这样做的。但是当我尝试在 React 官方包装器中添加函数时，它返回未定义的“元素”。我如何使它适应 React 官方包装器。请记住，我只想忽略空值的间隙，而不是零。这是我的代码的代码和框，逻辑应该在 Chart.js 组件中。 Chart is in ./components/Chart.js

var justifyColumns = function (chart) {
    var categoriesWidth = chart.plotSizeX / (1 + chart.xAxis[0].max - chart.xAxis[0].min),
        distanceBetweenColumns = 0,
        each = Highcharts.each,
        sum, categories = chart.xAxis[0].categories,
        number;
    for (var i = 0; i < categories.length; i++) {
        sum = 0;
        each(chart.series, function (p, k) {
            if (p.visible) {
                each(p.data, function (ob, j) {
                    if (ob.category == categories[i]) {
                        sum++;
                    }
                });
            }
        });
        distanceBetweenColumns = categoriesWidth / (sum + 1);
        number = 1;
        each(chart.series, function (p, k) {
            if (p.visible) {
                each(p.data, function (ob, j) {
                    if (ob.category == categories[i]) {
                        ob.graphic.element.x.baseVal.value = i * categoriesWidth + distanceBetweenColumns * number - ob.pointWidth / 2;
                        number++;
                    }
                });
            }
        });
    }
};

Answer 1

您提供的函数不适用于 null 值，您也可以在没有反应包装器的情况下注意到这一点:http://jsfiddle.net/BlackLabel/2q18zkcj/

您需要更改函数的工作方式:

function justifyColumns(chart) {
  var categoriesWidth = chart.plotSizeX / (1 + chart.xAxis[0].max - chart.xAxis[0].min),
    distanceBetweenColumns = 0,
    each = Highcharts.each,
    sum, categories = chart.xAxis[0].categories,
    number;
  for (var i = 0; i < categories.length; i++) {
    sum = 0;
    each(chart.series, function (p, k) {
      if (p.visible) {
        each(p.data, function (ob, j) {
          if (ob.category == categories[i] && ob.y !== null) {
            sum++;
          }
        });
      }
    });
    distanceBetweenColumns = categoriesWidth / (sum + 1);
    number = 1;
    each(chart.series, function (p, k) {
      if (p.visible) {
        each(p.data, function (ob, j) {
          if (ob.category == categories[i] && ob.y !== null) {
            ob.graphic.element.x.baseVal.value = i * categoriesWidth + distanceBetweenColumns * number - ob.pointWidth / 2;
            number++;
          }
        });
      }
    });
  }
};

现场演示:https://codesandbox.io/s/p5j09zrz8q