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How to store key values ​​in js

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Release： 2018-04-20 15:39:12
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This time I will show you how to store key values ​​in js, and what are the precautions for storing key values ​​in js. The following is a practical case, let's take a look.

The front end sometimes needs to store key-value pairs. The main point is that the key must be a

string. It is important to note again that the key needs to be a string.

Key content

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title></title> 
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
var map={
 key1:'abc',
 key2:'def'
};
$(document).ready(function(){
 $("button").click(function(){
  map.key3=333;//js 里的键必须为字符串
  for(var key in map){//可以迭代键
   alert(map[key])//依据键取值
  }
  alert("add value:"+map.key3);
 });
});
</script>
</head>
<body>
 <button>click</button>
</body>
</html>
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I believe you have mastered the method after reading the case in this article. For more exciting content, please pay attention to other related articles on the php Chinese website!

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Related labels：
javascript storage key value
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