aurelia - TypeScript How to access object defined in other class -

i have project uses aurelia framework. want make global\static object should accessed across couple files. when try access different file says object undefined. here looks like:

firstfile.ts

export function showa() {     console.log("changed " + a); } export var = 3;  export class firstfile {     public modifya() {         = 7;         showa();     } 

it says = 7. use in other file this.

secondfile.ts

import firstfile = require("src/firstfile"); export class secondfile {     showa_again() {         firstfile.showa(); } 

i execute showa_again() in view file called secondfile.html

<button click.trigger="showa_again()" class="au-target">button</button> 

when click button, see in console variable "a" still 3. there way store variables between files?

i'd recommend inject firstfile secondfile. code has smell of bad architecture.

to answer question: looking static (playground sample)

export class firstfile {      static showa = function() {         console.log("changed " + firstfile.a);     }      static = 3;      public modifya() {         firstfile.a = 7;         firstfile.showa();     } }  export class secondfile {     showa_again() {         firstfile.showa();     } }