Extension methods in typescript (system)

Question

In my angular2 project I\'m trying to extend the prototype of the string class using typescript. This is my code:

interface String 
{
    startsWith(s:         


        

Answer 1

Instead of importing the code in html just put this at the top of your code:

import './utils/extensions';

Just replace it with your path to the file.

Here are some more resources on modules and imports:

TypeScript docs

MDN docs