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Importing tcomb gives undefined: 

import t from 'tcomb';
console.log(t); // undefined

// So this won't work
t.assert(t.Number.is(colorString), 'colorString is invalid argument');

However I got it working like this, which actually I like more:

import {assert, Number} from 'tcomb';
assert(Number.is(colorString), 'colorString is invalid argument');

Importing all as t returns just the assert() method not the full object

import * as t from 'tcomb';

I'm using a pretty standard setup with webpack-dev-server, angular 2, typescript and HMR. All libs so far load ok. The project is already a few months old.

Any idea on what is happening here? Why t is undefined?

Note: I'm using runtime check even if I have TS types all over the place because some services methods could still receive the wrong arguments at runtime. As a sidenote, tcomb seems fine to me, but just to learn, is there a better option than tcomb?

Adrian Moisa
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1 Answers1

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Have you tried var t = require('tcomb')? Perhaps something to do with the es6 import statement which is not working?

edster
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