Chart.js 更新多个图表

Question

我正在使用这个函数来更新我图表的某个数据集，但它似乎不起作用，我不明白为什么 功能：

`function addData(chart, label, data, i) {
    chart.data.labels.push(label);
    chart.data.datasets[i].data.push(data);
    chart.update();
   }`

当我运行以下代码时，每个图表都应该单独更新，但它们都是一样的

`birdCount = document.getElementsByClassName("bird").length
        addData(chart, [Generation], [birdCount], 0)
        var birdCountST = document.getElementsByClassName("bird11").length + document.getElementsByClassName("bird12").length
        console.log(birdCountST,'shortthickguys')
        addData(chart, [Generation], [birdCountST], 1)
        var birdCountST = document.getElementsByClassName("bird11").length + document.getElementsByClassName("bird12").length
        addData(chart, [Generation], [birdCountST], 2)`

Answer 1

我很笨，没有注意到，但是我复制的时候没有改变变量 它应该是这样的：:facepalm:

`birdCount = document.getElementsByClassName("bird").length
    addData(chart, [Generation], [birdCount], 0)
    var birdCountST = document.getElementsByClassName("bird11").length + document.getElementsByClassName("bird12").length
    console.log(birdCountST,'shortthickguys')
    addData(chart, [Generation], [birdCountST], 1)
    var birdCountLT = document.getElementsByClassName("bird21").length + document.getElementsByClassName("bird22").length
    addData(chart, [Generation], [birdCountLT], 2)`