Detailed explanation of js storage key value examples

This time I will bring you a detailed explanation of js storage key value examples. What are the precautions when using js storage key values. 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

nbsp;html>


<meta> 
<title></title> 
<script>
</script>
<script>
var map={
 key1:&#39;abc&#39;,
 key2:&#39;def&#39;
};
$(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>


 <button>click</button>

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!

Recommended reading:

What are the ways for vue-cli to shorten the first screen loading time

vue uses specified component caching steps Detailed explanation

The above is the detailed content of Detailed explanation of js storage key value examples. For more information, please follow other related articles on the PHP Chinese website!