GM_xmlhttpRequest + GM_download => Promises

gm_requests.js

// GM_download
function Download(url, name, opt={}) {
	Object.assign(opt, { url, name })

	return new Promise((resolve, reject) => {
		opt.onerror = reject
		opt.onload = resolve

		GM_download(opt)
	})
}

// GM_xmlhttpRequest
function Request(url, opt={}) {
	Object.assign(opt, {
		url,
		timeout: 2000,
		responseType: 'json'
	})

	return new Promise((resolve, reject) => {
		/*
		for (let f of ['onerror', 'ontimeout'])
			opt[f] = reject
		*/

		opt.onerror = opt.ontimeout = reject
		opt.onload = resolve

		GM_xmlhttpRequest(opt)
	})
}

good code!!! thx