Property 'assign' does not exist on type 'ObjectConstructor'

Question

I am using TypeScript in my application, where I use function:

Object.assign(this.success, success.json())

However, during compilation, I r

Answer 1

I faced this issue when testing a React application with Jest using @testing-library/react. The fix for me was to add the following to my setupTests.ts:

declare global {
    interface Object {
        /**
         * Returns an array of values of the enumerable properties of an object
         * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
         */
        values(o: { [s: string]: T } | ArrayLike): T[];

        /**
         * Returns an array of values of the enumerable properties of an object
         * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
         */
        values(o: {}): any[];

        /**
         * Returns an array of key/values of the enumerable properties of an object
         * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
         */
        entries(o: { [s: string]: T } | ArrayLike): [string, T][];

        /**
         * Returns an array of key/values of the enumerable properties of an object
         * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
         */
        entries(o: {}): [string, any][];
    }
}