Javascript 如何在HTML中单击一个按钮删除一段代码？

这是一个我正在尝试做的例子

这是代码

var data = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
    {
        label: "My First dataset",
        fillColor: "rgba(220,220,220,0.2)",
        strokeColor: "rgba(220,220,220,1)",
        pointColor: "rgba(220,220,220,1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(220,220,220,1)",
        data: [65, 59, 80, 81, 56, 55, 40]
    },
    {
        label: "My Second dataset",
        fillColor: "rgba(151,187,205,0.2)",
        strokeColor: "rgba(151,187,205,1)",
        pointColor: "rgba(151,187,205,1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(151,187,205,1)",
        data: [28, 48, 40, 19, 86, 27, 90]
    }
]
};

单击我的按钮后，我希望代码删除第一个数据集。（不过，我希望能够通过再次单击将其带回来）

因此，我希望在单击按钮时变成这样：

var data = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
    {
        label: "My Second dataset",
        fillColor: "rgba(151,187,205,0.2)",
        strokeColor: "rgba(151,187,205,1)",
        pointColor: "rgba(151,187,205,1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(151,187,205,1)",
        data: [28, 48, 40, 19, 86, 27, 90]
    }
]
};

可以使用

shift（）

从数组中删除第一项。大概是这样的：

$('#myButton').click(function() {
    data.datasets.shift();
});

---

到目前为止您尝试了什么？您可以从PHP中的数组中删除第一项，是的-但是我不知道这如何应用于Javascript中的数组。如果你问你能不能用PHP修改JS数组本身，那么不行。