createReadStream的TypeScript定义在选项中不接受{start：90，end：99}

Question

I just updated to TypeScript 1.6.2 and my call to createReadStream() won't compile because the type definition in node.d.ts does not expect 'start' and 'end' in the options parameter.

 var st = fs.createReadStream(logFile , {start: rstart, end: rend } );

will get this error:

 error TS2345: Argument of type '{ start: number; end: number; }' is not assignable to parameter of type '{ flags?: string; encoding?: string; fd?: string; mode?: string; bufferSize?: number; }'.

Since the documentation does mention these as valid options ( https://nodejs.org/api/fs.html#fs_fs_createreadstream_path_options ) I do believe the node.d.ts should be fixed and I can issue a pull request with the fix, but - in the meantime - is there a way to force this call to pass the compiler?

thanks

Answer 1

I do believe the node.d.ts should be fixed and I can issue a pull request with the fix, but - in the meantime - is there a way to force this call to pass the compiler?

You can assert it as any for now:

var st = fs.createReadStream(logFile, {start: rstart, end: rend } as any);

Or manually update your local node.d.ts to include those properties.