title: How to suppress typescript errors when compiling a single file by nodejs?
body: <p>When I use Node.js to compile a single TypeScript file from project, which has dependencies on other files I get multiple "Could not find symbol .." errors. Despite these errors JS file is created correctly. There are no explicit references in TypeScript files.</p>
  
  <p>Is there a way to suppress these errors? Or tell compiler where to look for dependencies, but not recompile all files?</p>
  
  <p>The reason I want to do this is performance. My goal is to use Grunt to watch for TypeScript files. On change it would compile them to JS, do some transformations, minimize, bundle and run unit tests. However, only a single step to compile all 160 typescript files to JS takes around 8 seconds, which is painfully slow for development process. Compiling only single changed file should speed it up.</p>