Build real-time stock quotes display based on JavaScript
Constructing real-time stock quotation display based on JavaScript
Introduction:
With the continuous development of financial markets, the display of real-time stock quotation is important for investors and traders Speaking becomes more and more important. In a modern trading platform, it is essential to provide a real-time stock price display function. This article will introduce how to use JavaScript and some related technologies to build a simple real-time stock quote display application.
- Preparation
Before starting, you need to prepare the following work: - A web page framework based on HTML and CSS
- An API for stock market data
- JavaScript programming environment and corresponding libraries
- Building a web page framework
First, we need to create a basic web page framework, including an area that displays stock quotes and corresponding CSS styles. The following is a simple example of a web page frame:
<!DOCTYPE html>
<html>
<head>
<title>实时股票行情展示</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div id="stock-info">
<h1 id="股票行情">股票行情</h1>
<ul id="stock-list"></ul>
</div>
<script src="script.js"></script>
</body>
</html>In the above example, we have used a title and an unordered list tag to display stock quotes. CSS styles can be added by yourself to beautify the page.
- Get stock market data
Next, we need to use a stock market data API to obtain real-time stock market information. Here we assume that we are using an API called "stock-api", which can return data in JSON format. We can use the fetch function in JavaScript to obtain this data.
fetch("https://api.stock-api.com/real-time")
.then(response => response.json())
.then(data => {
// 处理返回的数据
})
.catch(error => {
console.error("获取股票行情数据出错：", error);
});In the above code, we use the fetch function to send an HTTP request to obtain stock quotation data, and use the .then method to process the returned data.
- Dynamic display of stock quotes
After obtaining the stock quotes data, we need to dynamically display it on the web page. The following is a sample code:
const stockListElement = document.getElementById("stock-list");
function displayStockInfo(stockData) {
stockListElement.innerHTML = ""; // 清空原有的数据
stockData.forEach(stock => {
const liElement = document.createElement("li");
liElement.innerHTML = `${stock.symbol}: ${stock.price}`;
stockListElement.appendChild(liElement);
});
}
// 在fetch成功后调用displayStockInfo函数
fetch("https://api.stock-api.com/real-time")
.then(response => response.json())
.then(data => {
displayStockInfo(data);
})
.catch(error => {
console.error("获取股票行情数据出错：", error);
});In the above code, we use the getElementById function to get the ul element that displays the stock quote, and then create the li element by traversing the stock data and add it to the ul element .
- Update stock quotes in real time
To update stock quotes in real time, we can use a timer to regularly obtain the latest stock quotes data and update the display on the web page.
// 更新股票行情数据并动态展示
function updateStockInfo() {
fetch("https://api.stock-api.com/real-time")
.then(response => response.json())
.then(data => {
displayStockInfo(data);
})
.catch(error => {
console.error("获取股票行情数据出错：", error);
});
}
// 每5秒钟更新一次股票行情数据
setInterval(updateStockInfo, 5000);In the above code, we use the setInterval function to call the updateStockInfo function every 5 seconds to update the stock market data and page display.
Summary:
Through the above steps, we used JavaScript and some related technologies to build a simple real-time stock quotation display application. In practical applications, we can customize different display methods and styles according to needs, and we can also add some interactive functions, such as clicking on stock quotes for in-depth viewing. I hope this article can provide some reference and help for readers to build real-time stock quotation display applications.
（Word count: 800 words）
The above is the detailed content of Build real-time stock quotes display based on JavaScript. For more information, please follow other related articles on the PHP Chinese website!
JavaScript and the Web: Core Functionality and Use CasesApr 18, 2025 am 12:19 AMThe main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.
Understanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AMUnderstanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.
Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AMPython is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AMPython and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.
From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AMThe shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.
JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AMDifferent JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.
Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AMJavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.
Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AMI built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing
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
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
Dreamweaver CS6
Visual web development tools
WebStorm Mac version
Useful JavaScript development tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
Notepad++7.3.1
Easy-to-use and free code editor
