SourceMap HTTP 响应头链接生成的代码到一个 source map，使浏览器能够重建原始的资源然后显示在调试器里。
| Header 类型 | Response header |
|---|---|
| Forbidden header name | no |
语法
SourceMap: <url> X-SourceMap: <url> (deprecated)
指令
<url>- 指向一个source map文件的一个相对（于请求的URL）或者一个绝对的URL。
例子
SourceMap: /path/to/file.js.map
规范
| Specification | Title |
|---|---|
| Draft document | Source Map Revision 3 Proposal |
浏览器兼容性
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