With the development of front-end development, more and more websites and applications have changed the form submission method from traditional synchronous requests to asynchronous requests. In this process, the front-end needs to convert the data in the form into JSON format, and then send it to the back-end for processing through an Ajax request. And this requires us to master some related technologies.
When we use jQuery to operate the form, we can convert the form data into JSON format through the following code:
var formData = $('form').serializeArray(); // 将表单序列化为键值对数组
var jsonData = {};
$.each(formData, function() {
if (jsonData[this.name]) { // 如果json中已经有了该属性，则将其转换为数组
if (!jsonData[this.name].push) {
jsonData[this.name] = [jsonData[this.name]];
}
jsonData[this.name].push(this.value || '');
} else {
jsonData[this.name] = this.value || ''; // 如果是第一次添加该属性，则直接加入json中
}
});In the above code, we first use the serializeArray() method Serialize the form into an array of key-value pairsformData. Then we create an empty object jsonData to store the converted JSON data. Finally, use the $.each() method to traverse the form data array and add each key-value pair to jsonData.
It should be noted that the above code uses judgment statements to deal with repeated key-value pairs in the form. When repeated attribute names are encountered, they are converted into arrays and new values are added to the array. middle.
The complete example is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>表单数据转JSON数据</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$('form').submit(function(event) {
event.preventDefault(); // 阻止表单提交
var formData = $(this).serializeArray(); // 将表单序列化为键值对数组
var jsonData = {};
$.each(formData, function() {
if (jsonData[this.name]) { // 如果json中已经有了该属性，则将其转换为数组
if (!jsonData[this.name].push) {
jsonData[this.name] = [jsonData[this.name]];
}
jsonData[this.name].push(this.value || '');
} else {
jsonData[this.name] = this.value || ''; // 如果是第一次添加该属性，则直接加入json中
}
});
console.log(jsonData); // 打印转换后的JSON数据，可以通过Ajax请求发送到后端进行处理
});
});
</script>
</head>
<body>
<form>
<label>姓名:</label>
<input type="text" name="name" value="张三"><br>
<label>性别:</label>
<input type="radio" name="gender" value="male" checked>男
<input type="radio" name="gender" value="female">女<br>
<label>爱好:</label>
<input type="checkbox" name="hobby" value="reading" checked>阅读
<input type="checkbox" name="hobby" value="music">音乐
<input type="checkbox" name="hobby" value="travel">旅游<br>
<button type="submit">提交</button>
</form>
</body>
</html>In this way, we have successfully converted the form data into JSON format and can send it to the backend through an Ajax request. At the same time, it should be noted that the form needs to prevent the default behavior before submitting it. Here we use the event.preventDefault() method.
The above is the detailed content of Convert jquery form data to json data. For more information, please follow other related articles on the PHP Chinese website!
What is useEffect? How do you use it to perform side effects?Mar 19, 2025 pm 03:58 PMThe article discusses useEffect in React, a hook for managing side effects like data fetching and DOM manipulation in functional components. It explains usage, common side effects, and cleanup to prevent issues like memory leaks.
Explain the concept of lazy loading.Mar 13, 2025 pm 07:47 PMLazy loading delays loading of content until needed, improving web performance and user experience by reducing initial load times and server load.
What are higher-order functions in JavaScript, and how can they be used to write more concise and reusable code?Mar 18, 2025 pm 01:44 PMHigher-order functions in JavaScript enhance code conciseness, reusability, modularity, and performance through abstraction, common patterns, and optimization techniques.
How does currying work in JavaScript, and what are its benefits?Mar 18, 2025 pm 01:45 PMThe article discusses currying in JavaScript, a technique transforming multi-argument functions into single-argument function sequences. It explores currying's implementation, benefits like partial application, and practical uses, enhancing code read
How does the React reconciliation algorithm work?Mar 18, 2025 pm 01:58 PMThe article explains React's reconciliation algorithm, which efficiently updates the DOM by comparing Virtual DOM trees. It discusses performance benefits, optimization techniques, and impacts on user experience.Character count: 159
What is useContext? How do you use it to share state between components?Mar 19, 2025 pm 03:59 PMThe article explains useContext in React, which simplifies state management by avoiding prop drilling. It discusses benefits like centralized state and performance improvements through reduced re-renders.
How do you prevent default behavior in event handlers?Mar 19, 2025 pm 04:10 PMArticle discusses preventing default behavior in event handlers using preventDefault() method, its benefits like enhanced user experience, and potential issues like accessibility concerns.
What are the advantages and disadvantages of controlled and uncontrolled components?Mar 19, 2025 pm 04:16 PMThe article discusses the advantages and disadvantages of controlled and uncontrolled components in React, focusing on aspects like predictability, performance, and use cases. It advises on factors to consider when choosing between them.
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
Dreamweaver CS6
Visual web development tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
