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How To Fix "TS2349: Cannot Invoke An Expression Whose Type Lacks A Call Signature"

- 1 answer

The DefinitelyTyped library:

declare module "history/lib/createBrowserHistory" 
{
    export default function createBrowserHistory(options?: HistoryModule.HistoryOptions): HistoryModule.History
}

gives the compile error in the title when used like this (although it worked in plain old .jsx before converting to .tsx):

import React = require('react');
import reactDom = require('react-dom');
import ReactRouter = require('react-router');
import createBrowserHistory = require('history/lib/createBrowserHistory');
import routes = require('app/tools/routes');

export function createReactApp() : void
{
    let history = createBrowserHistory(); // <-- error :(
    reactDom.render
    (
        <ReactRouter.Router history={history}>{routes}</ReactRouter.Router>,
        document.getElementById('app')
    );
}

What am I doing wrong?

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Answer

The module you are trying to use is an ES6 module, so you must import it using ES6 syntax:

import createBrowserHistory from 'history/lib/createBrowserHistory';

Alternatively you can use the legacy import = syntax and access the default property of the exported object instead for the default export (but you shouldn’t; use the ES6 import!).

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source: stackoverflow.com
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