Javascript定位数组中的项目

Question

如何在此数组中定位“数据”？

var waterBarData = {
labels: ["January", "February", "March", "April", "May", "June"],
datasets: [
    {
        label: "My Second dataset",
        fillColor: "rgba(98,203,49,1.0)",
        strokeColor: "rgba(98,203,49,0.8)",
        highlightFill: "rgba(98,203,49,0.75)",
        highlightStroke: "rgba(98,203,49,1)",
        data: [28, 48, 40, 19, 86, 27]
    }
]};

我的猜测在下面，但这似乎不起作用

waterBarData.datasets[data]

Answer 1

对象中的datasets是一个数组，因此您需要按索引访问它：

waterBarData.datasets[0]['data'];

// or using dot notation
waterBarData.datasets[0].data;