fetch-addons/dist/esm/headers.js

A collection of addons for the fetch API

import { getRequest } from './request.js';
export function deleteEmptyHeaders(headers) {
    // Can't do it in the headers.forEach loop, see https://twitter.com/meijer_s/status/1676506116736397312
    for (const [key, value] of [...headers]) {
        if (value && value !== 'undefined' && value !== 'null')
            continue;
        headers.delete(key);
    }
}
export function getHeaders(headersOrInput, init) {
    if (typeof headersOrInput === 'string' || headersOrInput instanceof URL || headersOrInput instanceof Request) {
        return getRequest(headersOrInput, init).headers;
    }
    return headersOrInput instanceof Headers ? headersOrInput : new Headers(headersOrInput);
}