This error message is usually encountered in TypeScript when you are trying to access a property on an object that has an implicit ‘any’ type. Specifically, it occurs when you try to access a property on an object of type ‘typeof globalThis’ which does not have an index signature.
TypeScript’s type inference system tries to assign the correct type to your variables, but sometimes it cannot determine the exact type. In such cases, it assigns the type ‘any’ to the variable, which allows you to perform any operations on it, but it also disables type checking for that variable.
To fix this error, you can explicitly define the type of the object or variable in question. Here’s an example:
const myObject: { [key: string]: any } = globalThis;
const propertyValue = myObject['propertyName'];
In this example, we explicitly define the type of ‘myObject’ using an index signature. The index signature specifies that the object can have properties with any names (represented by the ‘key’ type), and the values can have any type (represented by the ‘any’ type). Now, we can access properties on ‘myObject’ without encountering the error.