Issue: The type does not have any compatible call signatures, therefore cannot be invoked. Error message: 'Cannot invoke an expression whose type lacks a call

I'm currently integrating https://github.com/mapbox/polylabel into my Angular project. However, when I attempt to run ng server, the build fails and displays the following error:

error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'node_modules/@types/polylabel/index' has no compatible call signatures.

Below is the index.ts code snippet:

    // Type definitions for polylabel 1.0
   // Project: https://github.com/mapbox/polylabel

    // Definitions by: Denis Carriere <https://github.com/DenisCarriere>
    // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

    /**
     * Polylabel returns the pole of inaccessibility coordinate in [x, y] format.
     *
     * @param polygon - Given polygon coordinates in GeoJSON-like format
     * @param precision - Precision (1.0 by default)
     * @param debug - Debugging for Console
     * @example
     * var p = polylabel(polygon, 1.0);
     */
    declare function polylabel(polygon: number[][][], precision?: number, debug?: boolean): number[];
    declare namespace polylabel {}
    export default polylabel;

Answer №1

It turns out I forgot to install polylabel globally. After running npm install polylabel, the problem was resolved.

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