Web Front-end
JS Tutorial
How to serialize cookie name-value pairs to Set Cookie header string in JavaScript?
How to serialize cookie name-value pairs to Set Cookie header string in JavaScript?
Cookie 允许我们在网络浏览器中存储用户数据，以便快速响应。例如，当用户在任何 Web 应用程序中打开个人资料页面时，网页都会从服务器接收数据。服务器还发送包含要存储在 Web 浏览器中的数据的 cookie。当用户再次访问个人资料页面时，它会从 cookie 中获取数据，而不是从服务器中获取数据以快速加载网页。
要获取数据，浏览器首先查看 cookie，如果没有找到 cookie 中存储的数据，则会向服务器请求。本教程将教我们如何在 JavaScript 中将 cookie 名称-值对序列化为设置的 cookie 标头字符串。
为什么我们需要序列化 cookie 名称-值对？
我们可以将cookie作为键值对存储在浏览器中，并且cookie不接受名称值对中的一些特殊字符，如下所示。
\ " / [ ] ( ) < > ? = { } @ , ; :
所以，我们需要将上面的字符替换为特殊字符的UTF-8编码。例如，我们需要用“%20”转义序列替换空格。
使用encodeURIComponent()方法在JavaScript中序列化cookie
encodeURIComponent() 允许开发人员通过用一个、两个、三个或四个转义序列替换特殊字符来对字符串进行编码。这里，转义序列代表字符的 UTF-8 编码。
语法
用户可以按照下面的语法使用encodeURIComponent()方法对URI进行编码。
encodeURIComponent(key); encodeURIComponent(value);
在上面的语法中，encodeURIComponent()方法分别获取cookies的键和值，并通过用转义序列替换特殊字符来对它们进行编码。
示例
在下面的示例中，我们创建了serializeCookies()函数，该函数将键和值作为参数。之后，我们使用encodeURIComponent()方法分别对键和值进行编码。接下来，我们使用字符串文字来分隔其键值对‘=’字符。
在输出中，我们可以观察到转义序列替换了特殊字符。
<html>
<body>
<h3>Using the <i> encodeURIComponent() </i> method to serialize cookies in JavaScript</h3>
<div id = "output"> </div>
<script>
let output = document.getElementById('output');
function serializeCookies(key, value) {
let serializeKey = encodeURIComponent(key);
let serializeValue = encodeURIComponent(value);
let serializeCookie = serializeKey + "=" + serializeValue;
return serializeCookie;
}
output.innerHTML += "The key is name, and the value is Shubham Vora. <br>";
output.innerHTML += "After serializing the cookies key-value pair, result is " + serializeCookies("name", "Shubham Vora");
</script>
</body>
</html>
示例
在下面的示例中，我们创建了箭头函数来序列化 cookie。我们编写了单行函数来对键值对进行编码并返回它们。此外，我们在serializeCookies()函数的键值参数中使用了一些更特殊的字符，用户可以在输出中观察到每个特殊字符都有不同的转义序列。
<html>
<body>
<h3>Using the <i> encodeURIComponent() </i> method to serialize cookies with arrow functions in JavaScript</h3>
<div id = "output"> </div>
<script>
let output = document.getElementById('output');
const serializeCookies = (key, value) =>
`${encodeURIComponent(key)}=${encodeURIComponent(value)}`
output.innerHTML += "The key is key@#$12 and value is Val&^%12#$. <br>";
output.innerHTML += "After serializing the cookies key-value pair, result is " + serializeCookies("key@#$12", "Val&^%12#$");
</script>
</body>
</html>
示例
在下面的示例中，我们创建了两个输入字段。一种是将key作为输入，另一种是将value作为输入。之后，当用户单击提交按钮时，它会调用serializeCookies()函数，该函数访问输入值并使用encodeURIComponent()方法对它们进行编码。
<html>
<body>
<h3>Using the <i> encodeURIComponent() </i> method to serialize cookies in JavaScript</h3>
<label for = "key"> Enter Key </label>
<input type = "text" id = "key">
<br> <br>
<label for = "Value"> Enter Value </label>
<input type = "text" id = "Value">
<br> <br>
<div id = "output"> </div>
<br>
<button onclick = "serializeCookies()"> Submit </button>
<script>
let output = document.getElementById('output');
function serializeCookies() {
let key = document.getElementById('key').value;
let value = document.getElementById('Value');
output.innerHTML = "The encoded key-value pair is " + `${encodeURIComponent(key)}=${encodeURIComponent(value)}`
}
</script>
</body>
</html>
在本教程中，我们学习了使用encodeURIComponent()方法序列化cookie的键值对。此外，我们还看到了序列化 cookie 的不同示例。在最后一个示例中，用户可以添加自定义输入，并观察 cookie 的编码值。
The above is the detailed content of How to serialize cookie name-value pairs to Set Cookie header string in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1385
52
What should I do if I encounter garbled code printing for front-end thermal paper receipts?
Apr 04, 2025 pm 02:42 PM
Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...
Who gets paid more Python or JavaScript?
Apr 04, 2025 am 12:09 AM
There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.
How to merge array elements with the same ID into one object using JavaScript?
Apr 04, 2025 pm 05:09 PM
How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
The difference in console.log output result: Why are the two calls different?
Apr 04, 2025 pm 05:12 PM
In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...
TypeScript for Beginners, Part 2: Basic Data Types
Mar 19, 2025 am 09:10 AM
Once you have mastered the entry-level TypeScript tutorial, you should be able to write your own code in an IDE that supports TypeScript and compile it into JavaScript. This tutorial will dive into various data types in TypeScript. JavaScript has seven data types: Null, Undefined, Boolean, Number, String, Symbol (introduced by ES6) and Object. TypeScript defines more types on this basis, and this tutorial will cover all of them in detail. Null data type Like JavaScript, null in TypeScript
How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website?
Apr 04, 2025 pm 05:36 PM
Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...
Can PowerPoint run JavaScript?
Apr 01, 2025 pm 05:17 PM
JavaScript can be run in PowerPoint, and can be implemented by calling external JavaScript files or embedding HTML files through VBA. 1. To use VBA to call JavaScript files, you need to enable macros and have VBA programming knowledge. 2. Embed HTML files containing JavaScript, which are simple and easy to use but are subject to security restrictions. Advantages include extended functions and flexibility, while disadvantages involve security, compatibility and complexity. In practice, attention should be paid to security, compatibility, performance and user experience.
