Unable to call a function without a call signature. The type 'moment' does not have any compatible call signatures at position (4,1). TS2349 error needs resolution

I encountered issues with Typescript 3.* and momentjs when working with dates, resulting in compile time errors.

Error:(3, 13) TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'typeof moment' has no compatible call signatures.

To address this error, I sought out a solution and came across an informative article detailing the steps to resolve it.

However, even after following the instructions outlined in the article, I still faced compile time errors.

Error:(1, 8) TS1192: Module '"/Users/hogehoge/Work/Work_Fork/hoge/node_modules/moment/moment"' has no default export.

Below are snippets from my tsconfig file and program code:

{
  "compilerOptions": {
    "moduleResolution": "node",
    "skipLibCheck": false,
    "target": "es5",
    "module": "commonjs",
    "lib": ["es2017", "dom"],
    "experimentalDecorators": true,
    "allowJs": false,
    "jsx": "react",
    "sourceMap": true,
    "strict": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true,
    "esModuleInterop": true,
    "removeComments": true,
    "newLine": "LF",
    "downlevelIteration": true,
    "resolveJsonModule": true,
    "allowSyntheticDefaultImports": false
  },
  "exclude": ["node_modules"]
}


import moment from 'moment';

console.log(moment().format('YYYY-MM-DD'))
typescript

Answer №1

Since I didn't have access to your package.json file, I decided to recreate your scenario in the following manner:

npm init
npm i typescript moment @types/node

The code for test.ts:

let moment = require("moment");
console.log(moment().format('YYYY-MM-DD'))

(using require instead of import)

Next, I ran the "compiler":

_modules/.bin/tsc test.ts

Fortunately, there were no errors, and everything worked smoothly for me. At present, the output from the script is 2019-09-30.

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