Javascript

Question

有没有可能得到这样的数据

我的多个 And Or 条件示例代码

var dataset =  { "dataone": "dataonevalue", "datatwo": "datatwovalue", "datathree:"" }

switch (dataset.dataone && dataset.datatwo && dataset.datathree) {
      case "":
      case null:
      case undefined:
        console.log("data missing")
        break;
      default:
        dataset.dataone = "dataonevalue"
        dataset.datatwo = "datatwovalue"
        dataset.datathree = "datathreevalue"
    }

我必须显示哪个键有 "" 或 null 或 undefined 并且我必须获得在 Json object

中找到这三个中的任何一个的特定键

比如这样

console.log("data missing in datathree")

该怎么做？...任何人都可以帮我解决这个问题吗？

Answer 1

I have to show which key has the "" or null or undefined and I have to get the particular key in which any of the three is found in Json object

试试这个：

let dataset = {
  "dataone": "dataonevalue",
  "datatwo": "",
  "datathree": null
};


for (const item in dataset) {
  let value = dataset[item];
  if (value === "") {
    console.log(`"${item}" is empty`);
  } else if (value === null) {
    console.log(`"${item}" is null`);
  } else if (value === undefined) {
    console.log(`"${item}" is undefined`);
  }
}

希望对您有所帮助！

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