<!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <title>下载Word文件</title> </head> <body> <a id="downloadLink" style="display:none;"></a> <script> const base64 = `UEsDBBQABgAI***AIQDHBpK3ygEAAKMF***TAAgCW0NvbnRlbnRfVHlwZXNdLnhtbCCiBAIooAAC******************************************************************************************************************************************************************************AA
你提供的代码是一个HTML文件，目的是实现下载Word文件的功能，不过代码不完整。代码中定义了一个隐藏的链接元素，也有一个Base64编码的字符串，但没有利用这个Base64字符串来实现文件下载的逻辑。 以下是补全后的代码： ```html <!DOCTYPE html> <html> <head> <!-- 设置字符编码为UTF - 8 --> <meta charset="utf-8"/> <title>下载Word文件</title> </head> <body> <!-- 定义一个隐藏的a标签，用于触发文件下载 --> <a id="downloadLink" style="display:none;"></a> <script> // 假设这是Base64编码的Word文件内容 const base64 = `UEsDBBQABgAI*AIQDHBpK3ygEAAKMF*TAAgCW0NvbnRlbnRfVHlwZXNdLnhtbCCiBAIooAACAA`; // 将Base64字符串转换为二进制数据 const binary = atob(base64); // 创建一个Uint8Array来存储二进制数据 const array = new Uint8Array(binary.length); for (let i = 0; i < binary.length; i++) { array[i] = binary.charCodeAt(i); } // 创建一个Blob对象，指定MIME类型为Word文件 const blob = new Blob([array], { type: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' }); // 创建一个URL对象，指向Blob对象 const url = URL.createObjectURL(blob); // 获取下载链接元素 const downloadLink = document.getElementById('downloadLink'); // 设置下载链接的href属性为Blob对象的URL downloadLink.href = url; // 设置下载文件名 downloadLink.download = 'example.docx'; // 触发点击事件，开始下载 downloadLink.click(); // 释放URL对象，防止内存泄漏 URL.revokeObjectURL(url); </script> </body> </html> ``` 我在以往的开发过程中，碰到过以下几点需要格外小心处理的地方： 1. 确保Base64字符串是有效的，若Base64字符串无效，在使用`atob`方法解码时会报错。 2. 注意Blob对象的MIME类型设置，不同类型的文件需要设置对应的MIME类型，否则可能导致下载的文件无法正常打开。 3. 及时释放通过`URL.createObjectURL`创建的URL对象，避免内存泄漏，特别是在频繁下载文件的场景下。 [2025-10-10 21:38:12 | AI写代码神器 | 613点数解答]
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