Javascript 用于创建表头的Js foreach

我使用下面的代码动态创建表标题

var tableHeaders = "<th>No</th>";
            tableHeaders += "<th>Devices</th>";
            tableHeaders += "<th>Users</th>";
    response.forEach(function(entry){ 
                            entry.chartElements.forEach(function(childrenEntry) {
                              tableHeaders += "<th>" + childrenEntry.label + "</th>";
                            });
                        });

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它实际上是在进入forEach吗？您验证了吗？是的，它正在进入forEach。控制台中有错误吗？是

response

一个数组还是仅仅一个对象？response是一个对象数组，每个对象包含另一个数组，即chartElements。控制台中没有错误。

0: Object
      chartElements: [{count: 1
                     label: "Lollipop"
                     totalCount: 0}]
      deviceCount: 1
      deviceName: "Lenovo"

1: Object
    chartElements: [{count: 1
                     label: "Lollipop"
                     totalCount: 0}]
      deviceCount: 1
      deviceName: "Zenfone"
2: Object
    chartElements: [{count: 1
                     label: "Lollipop"
                     totalCount: 0}]
      deviceCount: 1
      deviceName: "MotoG"
3: Object
    chartElements: [{count: 1
                     label: "Lollipop"
                     totalCount: 0}]
      deviceCount: 1
      deviceName: "Nexus5