Home Web Front-end HTML Tutorial A simple guide to reading text files in HTML

A simple guide to reading text files in HTML

Apr 09, 2024 pm 04:21 PM
html File operations

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.

在 HTML 中读取文本文件的简单指南

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();
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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>
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  1. 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.

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