javascript - Extending builtin objects in TypeScript on Netbeans with plugin -

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i trying transcript existing javascript code typescript , ran problem extending builtin objects object.defineproperty, e.g. string.prototype.

object.defineproperty(string.prototype, 'testfunc', { value: function():string {return 'test';} });  var s1:string = 'abc'.testfunc();             // property 'testfunc' not exist on type 'string' var s2:string = string.prototype.testfunc();  // property 'testfunc' not exist on type 'string'   object.defineproperty(object, 'testfunc', { value: function():string {return 'test';} });  var s:string = object.testfunc();             // property 'testfunc' not exist on type 'objectconstructor'

it gets translated javascript, however, netbeans 8.1 typescript plugin claims errors listed comments above.

all of confused experiments declare , interface did not match proper syntax. have no idea how work.

how can extend builtin objects in typescript , make ide accepting it?

after 1001 try'n'errors i've figured out working solution. seems want.

interface string { strfunc:function; }  object.defineproperty(string.prototype, 'strfunc', { value: function():string {return 'test';} });  var s1:string = 'abc'.strfunc(); var s2:string = string.prototype.strfunc();   interface objectconstructor { objfunc:function; }  object.defineproperty(object, 'objfunc', { value: function():string {return 'test';} });  var s:string = object.objfunc();  // objfunc should not work on strings: var s:string = 'a string instance'.objfunc(); // property 'testfunc' not exist on type 'string'

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