我有一個帶有兩個或多個帶 dateAxis 的 XYCharts 的容器，我想使用 jQuery 滑塊同時更改容器中所有圖表的縮放比例。我試圖讓下面的函數運行，但它不起作用。$("#slider-range").slider({    animate: "fast",    range: true,    min: 0,    max: 1,    step: 0.01,    values: [0, 1],    slide: function (event, ui) {        for (var i = 0; i < container.children.length; i++) {            container.children[i].dateAxis[0].start = ui.values[0];            container.children[i].dateAxis[0].end = ui.values[1];        }    }});我總是收到錯誤消息“無法讀取未定義的屬性 'dateAxis'”這是我的代碼：am4core.ready(function () {    am4core.useTheme(am4themes_animated);    container = am4core.create("container", am4core.Container);    container.width = am4core.percent(100);    container.height = am4core.percent(100);    container.layout = "vertical";});function createSimpleLineChart() {    var chart = container.createChild(am4charts.XYChart);    ...    var dateAxis = chart.xAxes.push(new am4charts.DateAxis());    dateAxis.baseInterval = { "timeUnit": "second", "count": 1 };    ...    return chart;}