核心内容摘要
seo入门新手教程
seo优化培训外推蜘蛛池
graph LR A[原始需求：下载 script.js] --> B{是否同源？} B -->|是| C[服务端配置：修改 Content-Type + Content-Disposition] B -->|否| D[前端构造 Blob URL] C --> C1[设置 Content-Type: application/octet-stream] C --> C2[设置 Content-Disposition: attachment; filename=script.js] D --> D1[fetch 同源 JS → arrayBuffer → new Blob] D --> D2[URL.createObjectURL(blob) → a.href + download] D --> D3[注意：Blob URL 需在 click 后立即触发，且调用 revokeObjectURL 清理]
