语法错误：Using //@ to indicate sourceURL pragmas is deprecated.Use //# instead

¥Message

Warning: SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead

Warning: SyntaxError: Using //@ to indicate sourceMappingURL pragmas is deprecated. Use //# instead

¥Error type

发生 SyntaxError 的警告。JavaScript 的执行不会停止。

¥A warning that a SyntaxError occurred. JavaScript execution won't be halted.

¥What went wrong?

JavaScript 源代码中有一种已弃用的源映射语法。

¥There is a deprecated source map syntax in a JavaScript source.

JavaScript 源通常会被组合和缩小，以便更有效地从服务器交付它们。使用 源映射，调试器可以将正在执行的代码映射到原始源文件。

¥JavaScript sources are often combined and minified to make delivering them from the server more efficient. With source maps, the debugger can map the code being executed to the original source files.

每当在 //@cc_on 被解释为在 IE JScript 引擎中打开条件编译后在页面中找到源映射规范时，由于与 IE 发生冲突，源映射规范更改了语法。IE 中的 条件编译注释 是一个鲜为人知的功能，但它破坏了 jQuery 和其他库的源映射。

¥The source map specification changed the syntax due to a conflict with IE whenever it was found in the page after //@cc_on was interpreted to turn on conditional compilation in the IE JScript engine. The conditional compilation comment in IE is a little known feature, but it broke source maps with jQuery and other libraries.

¥Examples

¥Deprecated syntax

不推荐使用带有 "@" 符号的语法。

¥Syntax with the "@" sign is deprecated.

//@ sourceMappingURL=http://example.com/path/to/your/sourcemap.map

¥Standard syntax

请改用 "" 符号。

¥Use the "#" sign instead.

//# sourceMappingURL=http://example.com/path/to/your/sourcemap.map

或者，你可以为 JavaScript 文件设置 SourceMap 标头，以避免出现注释：

¥Or, alternatively, you can set a SourceMap header to your JavaScript file to avoid having a comment at all:

SourceMap: /path/to/file.js.map

¥See also

• Firefox 源文档中的 使用源地图
• developer.chrome.com 上的 JavaScript 源映射简介 (2012)
• SourceMap