A simple guide to reading text files in HTML

Create an XMLHttpRequest object through JavaScript, set the request, and listen for the response ready event to read the text file in HTML. In a practical case, by creating a text file and adding HTML code, the content of the text file can be output to the specified element on the page.

A simple guide to reading text files in HTML

Introduction:
In HTML Reading text files is essential for displaying web page content or interacting with external data. This article will provide a step-by-step guide on how to easily read text files with JavaScript.

Code block:

// 创建一个 XMLHttpRequest 对象
const xhr = new XMLHttpRequest();

// 打开一个 GET 请求
xhr.open('GET', 'path/to/textfile.txt', true);

// 设置请求类型
xhr.setRequestHeader('Content-Type', 'text/plain');

// 监听响应就绪事件
xhr.onload = function() {
  // 检查请求状态
  if (xhr.readyState === 4 && xhr.status === 200) {
    // 获得文本文件内容
    const text = xhr.responseText;
    
    // 将文本文件内容输出到页面
    document.getElementById('result').innerHTML = text;
  }
};

// 发送请求
xhr.send();

Practical case:

Suppose we have a file named content.txt A text file containing the following text: "Hello World!". Now, we want to display this text into a web page with HTML element ID result.

Steps:

1. Create a content.txt file and save the text "Hello World!".
2. Add the following code in the HTML page:

<div id="result"></div>
<script>
  // 执行读取文本文件的代码块
</script>

3. Open the HTML page in the browser, the text "Hello World!" will be displayed in the #result element.

Conclusion:

This guide shows how to easily read text files in HTML using JavaScript. By following these steps and examples, you can easily load external data into your web pages.

The above is the detailed content of A simple guide to reading text files in HTML. For more information, please follow other related articles on the PHP Chinese website!