defining constants in typescript (ionic application)

Question

In my Ionic application I am defining constants as

//constants.ts
export var CONSTANTS = {
 API_ENDPOINT: 'http://localhost:3000/'
};

and importing it as

import {CONSTANTS} from '../../services/constants'; //the path is correct

However I get the error CONSTANTS not defined in the file where I am importing.. what am i missing here ?

score 23 · Answer 1 · edited Oct 28 '17 at 21:18

23

Here is how you should do it:

// constants.ts
export const API_ENDPOINT= 'http://localhost:3000/';

And importing it as:

import * as Constants from '../../services/constants';

And you can access it like this:

Constants.API_ENDPOINT;

edited Oct 28 '17 at 21:18

Community

answered Mar 24 '17 at 07:00

Gus Arik

2

what about if i want to create multiple variables in constant.ts? 1. where do i put it in the project structure 2. how to access single variable from it thank you – George Dec 20 '17 at 23:31

Hardik Vaghani · Answer 2 · 2016-07-23T05:34:58.693

1

For Ionic

app.value('config', {
  "constant1": "value1",
  "constant2": "value2"
});

and access it with

config.constant1

Do not forget to inject dependency config.

For Nativescript

Define

var configObject = {
    testData: false,
    apiUrl: "https://www.domain.com/api/v1/"
};

Use

var config = require('../../utils/config');

and get value

config.apiUrl

Regards

edited Jul 23 '16 at 05:34

answered Jun 17 '16 at 06:54

Hardik Vaghani

2

I wish you could elaborate more as to where you add this code. Inside what file? – JoeGalind Jan 28 '19 at 02:56

score 1 · Answer 3 · answered Apr 24 '19 at 12:25

In my App I created my constant file like bellow,in my main directory of my app inside filename - "envrionment.ts"

export const environment = {
  site_url : 'http://localhost/wp',
  quotes_url : '/wp-json/wp/v2/quotes',
  jwt_url: '/wp-json/jwt-auth/v1/token'
}

Then I imported from inside my provider like bellow:

import {environment} from '../../envrionment';

Hope it helps, Thanks :)

score 0 · Answer 4 · answered Jun 17 '16 at 04:56

0

However I get the error CONSTANTS not defined in the file where I am importing

It works fine. Double check:

answered Jun 17 '16 at 04:56

basarat

4 Answers4