Creating an instance of a Javascript class from TypeScript

Question

I am trying to call a javascript class from Typescript but the compiler (VS) is throwing a wobbly.

The class itself is InfoBox but unfortunately I cannot find a typescript definition for it.

When I try to use it from my TS class it complains that it cannot find name "InfoBox"

public showInfoWindow(latLng: google.maps.LatLng, map: google.maps.Map): InfoBox {
    var infobox = new InfoBox({
    // ...
    }

    return infobox;
}

In the InfoBox.js file it is defined using the prototype method like so

function InfoBox(opt_opts) { ... }
InfoBox.prototype = new google.maps.OverlayView();

Paleo · Accepted Answer · 2016-08-05 09:15:45Z

1

You can declare the class yourself, for example in a file InfoBox.d.ts:

// InfoBox.d.ts
declare class InfoBox {
    constructor(obj: any);
    // Here the members of InfoBox you use
}

The documentation on declaration files is here.

answered Aug 5, 2016 at 9:15

Paleo

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1 Comment

Chris Over a year ago

I tried this, I must have got the syntax wrong, thanks!

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