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

user_4345344 0
Viewed 72883

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

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

However, during compilation, I receive the following error:

 error TS2339: Property 'assign' does not exist on type 'ObjectConstructor'.

Do you have any idea how can I get rid of this error?

typescript
7 Answers

You can use spread operator as in ES6

const obj = {...this.success,...success.json()};

user_66275590

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<T>(o: { [s: string]: T } | ArrayLike<T>): 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<T>(o: { [s: string]: T } | ArrayLike<T>): [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][];
    }
}
user_28842910
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