--enable-source-maps

为堆栈跟踪启用 源映射 v3 支持。

¥Enable Source Map v3 support for stack traces.

当使用转译器（例如 TypeScript）时，应用抛出的堆栈跟踪会引用转译后的代码，而不是原始的源位置。--enable-source-maps 启用源映射缓存并尽最大努力报告相对于原始源文件的堆栈跟踪。

¥When using a transpiler, such as TypeScript, stack traces thrown by an application reference the transpiled code, not the original source position. --enable-source-maps enables caching of Source Maps and makes a best effort to report stack traces relative to the original source file.

覆盖 Error.prepareStackTrace 可能会阻止 --enable-source-maps 修改堆栈跟踪。在重写函数中调用并返回原始 Error.prepareStackTrace 的结果，以使用源映射修改堆栈跟踪。

¥Overriding Error.prepareStackTrace may prevent --enable-source-maps from modifying the stack trace. Call and return the results of the original Error.prepareStackTrace in the overriding function to modify the stack trace with source maps.

const originalPrepareStackTrace = Error.prepareStackTrace;
Error.prepareStackTrace = (error, trace) => {
  // Modify error and trace and format stack trace with
  // original Error.prepareStackTrace.
  return originalPrepareStackTrace(error, trace);
}; 拷贝

注意，启用源映射会在访问 Error.stack 时给你的应用引入延迟。如果你在应用中频繁访问 Error.stack，则考虑 --enable-source-maps 的性能影响

¥Note, enabling source maps can introduce latency to your application when Error.stack is accessed. If you access Error.stack frequently in your application, take into account the performance implications of --enable-source-maps.