I'm facing a challenge with one of the libraries I'm using as it is throwing a lot of TypeScript errors related to Object functions.
The list of TS errors that I encountered include:
error TS2339: Property 'random' does not exist on type 'Object'.
error TS2339: Property 'isArray' does not exist on type 'Object'.
error TS2339: Property 'defineProperties' does not exist on type 'Object'.
error TS2339: Property 'defineProperty' does not exist on type 'Object'.
To tackle this issue, I decided to create an Object interface where I define all the functions used and their respective types. I'm currently experimenting with functions and object types, with the Window element behaving correctly while the Object element presents difficulties.
interface Window {
Array: Object,
Object: Object,
WeakMap: Object,
Symbol: Object,
Math: Object,
}
interface Object {
random: Function,
isArray: Function,
defineProperties: Function,
defineProperty: Function,
create: Function,
keys: Function,
for: Function,
iterator: Function,
asyncIterator: Function,
}
declare var window: Window
declare var object: Object
The number of errors has now increased to 15, indicating further challenges:
index.ts(1432,43): error TS2538: Type 'Object' cannot be used as an index type.
index.ts(1725,23): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Object' has no compatible call signatures.
When attempting to use the any type, the errors decrease but still pose a problem with 7 errors:
interface Object {
[index: string]: any
}
error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Object' has no compatible call signatures.
Here is one of the problematic lines of code:
if (!isValidElement(element) && ObjectHasOwnProperty.call(Object(element), 'default'))
While I have managed to mitigate some TS errors using // @ts-ignore, it is not a long-term solution as applying it to every line is cumbersome. The implementation of ts-ignore-start would be more beneficial (https://github.com/Microsoft/TypeScript/issues/19573)