TypeError: Illegal invocation: function called with incorrect this reference

I got this error when calling some method from generated api client.
when class looks like this:

class API {
    constructor(
        options?: {
            fetch?: typeof fetch;
        }
    ) {
        this.fetch = options?.fetch ?? globalThis.fetch;
    }
}

class API {
    constructor(
        options?: {
            fetch?: typeof fetch;
        }
    ) {
        this.fetch = options?.fetch ?? globalThis.fetch;
    }
}

and doing

(new API()).callMethod()

(new API()).callMethod()

will raise the error.
after some searching, I found different context makes this problem and this can be solved by passing fetch to

fetch.bind(globalThis)

fetch.bind(globalThis)

, which binds fetch's context to global context.
What I don't understand yet is why API works on browser and node, but Worker needs to bind globalThis to fetch.

Cloudflare Developers•12mo ago

delta

TypeError: Illegal invocation: function called with incorrect this reference

I got this error when calling some method from generated api client.
when class looks like this:

class API {
    constructor(
        options?: {
            fetch?: typeof fetch;
        }
    ) {
        this.fetch = options?.fetch ?? globalThis.fetch;
    }
}

class API {
    constructor(
        options?: {
            fetch?: typeof fetch;
        }
    ) {
        this.fetch = options?.fetch ?? globalThis.fetch;
    }
}

and doing

(new API()).callMethod()

(new API()).callMethod()

will raise the error.
after some searching, I found different context makes this problem and this can be solved by passing fetch to

fetch.bind(globalThis)

fetch.bind(globalThis)

, which binds fetch's context to global context.
What I don't understand yet is why API works on browser and node, but Worker needs to bind globalThis to fetch.

TypeError: Illegal invocation: function called with incorrect this reference

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