typescript - Reference .ts file for type check only -

i'd reference .ts file in .ts file. in real project, need type safety (overriding inherited member correct compilation).

my sample:

test1.ts:

export class test1 {  } 

test2.ts:

/// <reference path="test1.ts" /> export class test2 {     abc: test1; // error: test1 not found } 

is not possible? i'd avoid importing overhead don't need in outputted javascript file.

update: use test1 amd module class test1 instanciated , injected instance of class test2 underlying framework. why need export keyword don't want directly import module type1 - need reference class avoid compiler errors , have type safety etc..

without using module loader

the export keyword @ root level of file relevant if using module pattern (amd / commonjs). if not following work:

test1.ts:

class test1 { // not use export  } 

test2.ts:

/// <reference path="test1.ts" /> class test2 {     abc: test1; // no error } 

however if responsible ensuring test1.js loaded before test2.js, using script tag.

note: if use root level export without using module loader e.g.:

export class test2 { } 

the generated javascript:

var test2 = (function () {     function test2() { }     return test2; })(); exports.test2 = test2; 

is wrong since exports not defined anywhere.

if are using amd (or commonjs):

then need use import tell loader load file:

test1.ts:

export class test1 {  } 

test2.ts:

// no reference other ts required.      import mod = module("test1"); // instead need load module  export class test2 {     abc: mod.test1; // reference module  }  

additionally

in amd land each file is module. prefer not have module inside file since level of redirect. i.e. need importedfile.module.class instead of importedfile.class importedfile chose call file on import ( called mod in given example )