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Summary of methods for returning multiple values ​​in JS methods_javascript tips

WBOY
WBOYOriginal
2016-05-16 15:58:191415browse

When programming with JS, sometimes it is necessary to return two or more data in one method. This can be achieved by using the following methods:

1 The way to use arrays is as follows: 

<html>
<head>
  <title>JS函数返回多个值</title>
</head>
<body>
  <input type="button" onclick="getNames()" value="test" />

  <script type="text/javascript">
function getData()
{
  var names=new Array("oec2003","oec2004");
  return names;
}
function getNames()
{
  var names=getData();
  alert(getData()[0]); //返回oec2003
}
</script>

</body>
</html>

2 Encapsulate the data into Json and return it, as follows: 

<html>
<head>
<title>JS函数返回多个值</title>
</head>
<body>
<input type="button" onclick="getInfo()" value="test"/>
<script type="text/javascript">
function getData()
{
  var info={"name":"oec2003","age":"25"};
  return info;
}
function getInfo()
{
  var info=getData();
  var name=info["name"];
  var age=info["age"];
  alert("姓名："+name+" 年龄："+age);
}
</script>
</body>
</html>

For a more detailed introduction to Json, please see here

3 This is the simplest method, look at the code below: 

<html>
<head>
<title>JS函数返回多个值</title>
</head>
<body>
<input type="button" onclick="getInfo()" value="test"/>
<script type="text/javascript">
  function getData()
  {
    return ["oec2003", 25]
  }
  function getInfo()
  {
    var info = getData();
    alert("姓名：" + info[0] + "年龄：" + info[1]);
  }
</script>
</body>
</html>

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