DanielM DanielM - 3 months ago 156
TypeScript Question

Import Highcharts and highcharts-more (AngularJS 1.5 + TypeScript + webpack)

I'm trying to use Highcharts with some of its extensions (like "highcharts-more") in a project that uses webpack, TypeScript and AngularJS (version 1.5).

I've installed Highcharts through npm (https://www.npmjs.com/package/highcharts), but I'm not able to import the extensions that come with it.

The actual trick I'm doing is to set some global variables in the webpack config file

plugins: [
new webpack.ProvidePlugin({
Highcharts: 'highcharts',
HighchartsMore: 'highcharts/highcharts-more',
HighchartsExporting: 'highcharts/modules/exporting'
})
]


and extending Highcharts manually

HighchartsMore(Highcharts);
HighchartsExporting(Highcharts);


without any import in between. With this non-ideal solution TypeScript is complaining because

error TS2304: Cannot find name 'HighchartsMore'
error TS2304: Cannot find name 'HighchartsExporting'


In particular with Highcharts there is no error. Which I guess has to do with the fact that Highcharts is the only thing I manage to import, via

import * as Highcharts from 'highcharts';


which I can substitute with the Highchart global declaration in the webpack config. What I would like is to import every module in a clean way, something like

import {HighchartsMore} from 'highcharts-more';


Any idea is very much appreciated.

Answer

This type of error can occur when you do not have definition files for exported variables. Those Highcharts extensions still require them - you might want to read more about importing modules without d.ts here: https://github.com/Urigo/meteor-static-templates/issues/9 - it might change in the future.

You need to create a d.ts file for the extensions. For highcharts-more this is my file:

/// <reference path="index.d.ts" />

declare var HighchartsMore: (H: HighchartsStatic) => HighchartsStatic;

declare module "highcharts/highcharts-more" {
    export = HighchartsMore;
}

reference path points to standard DefinietelyTyped Highcharts file from here https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/highcharts/highcharts.d.ts It allows to use type from Highcharts.d.ts because initializing will need proper typing for initializing extension:

HighchartsMore(Highcharts);

And finally don't forget to include all d.ts files by defining tsconfig or writing reference path in your files.

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