Interface FormData

interface FormData {
    "[iterator]"(): FormDataIterator<[string, FormDataEntryValue]>;
    append(name: string, value: string | Blob): void;
    append(name: string, value: string): void;
    append(name: string, blobValue: Blob, filename?: string): void;
    delete(name: string): void;
    entries(): FormDataIterator<[string, FormDataEntryValue]>;
    forEach(
        callbackfn: (
            value: FormDataEntryValue,
            key: string,
            parent: FormData,
        ) => void,
        thisArg?: any,
    ): void;
    get(name: string): FormDataEntryValue;
    getAll(name: string): FormDataEntryValue[];
    has(name: string): boolean;
    keys(): FormDataIterator<string>;
    set(name: string, value: string | Blob): void;
    set(name: string, value: string): void;
    set(name: string, blobValue: Blob, filename?: string): void;
    values(): FormDataIterator<FormDataEntryValue>;
}