javascript - how to include a prototype in typescript -


i learning angular 2 , have written ts definition truncate method want use in 1 of services.

truncate.ts

interface string {     truncate(max: number, decorator: string): string; }  string.prototype.truncate = function(max, decorator){    decorator = decorator || '...';    return (this.length > max ? this.substring(0,max)+decorator : this); };

how import typescript module or @ least make available use globally.

how import typescript module or @ least make available use globally.

move file stringextenions.ts: 

interface string {     truncate(max: number, decorator: string): string; }   string.prototype.truncate = function(max, decorator){    decorator = decorator || '...';    return (this.length > max ? this.substring(0,max)+decorator : this); };

and import file like: 

import "./stringextensions"

more

https://basarat.gitbooks.io/typescript/content/docs/types/lib.d.ts.html


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