FormData

main.ts

declare global {
    interface FormDataEnhanced<FormName extends string> {
        get(name: FormName): FormDataEntryValue | null;
    }

    var FormDataEnhanced: {
        prototype: FormDataEnhanced<string>;
        new<FormName extends string>(form?: HTMLFormElement, submitter?: HTMLElement | null): FormDataEnhanced<FormName>;
    };
}

window.FormDataEnhanced = window.FormData

type FormName = 'foo' | 'bar'

let formData = new FormDataEnhanced<FormName>()



let value = formData.get('')

export {}