CD
Cloudflare Developers•4d 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() 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), 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.
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