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Detailed explanation of the use of storing key-value pairs in js

php中世界最好的语言Original: 2018-05-11 10:35:593855browse

This time I will bring you a detailed explanation of the use of stored key-value pairs in js. What are the precautions for using stored key-value pairs in js? Here are practical cases, let's take a look.

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>

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!

Detailed explanation of the use of storing key-value pairs in js

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