Home > Web Front-end > JS Tutorial > body text

Introduction to storage key-value pairs and precautions based on js_javascript skills

不言
Release: 2018-03-31 14:55:04
Original
1537 people have browsed it

The following editor will introduce to you the key-value pairs stored in js and the precautions. I hope to be helpful. Let’s follow the editor and 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 state again that the key needs to be a string.

Key contents

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</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>
</head>
<body>
 <button>click</button>
</body>
</html>
Copy after login

Related recommendations:

html5 Guide-5. Use web storage to store key-value pairs of data_html5 tutorial tips


The above is the detailed content of Introduction to storage key-value pairs and precautions based on js_javascript skills. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!