Function fetch

web/js/common/binding.js:135–144

* @param {FetchCallback} cb

(cb, state)

	 * @param {FetchCallback} cb
	 */
	async fetch(cb, state) {
		const url = cb.url.replace(/\{([^\}]+)\}/g, (m, v) => {
			return PathHelper.get(state, v);
		});
		const res = await (await api.fetchApi(url)).json();
		state["$result"] = res;
		for (const m of cb.then) {
			await invokeCallback(m, state);
		}
	},
	/**
	 * @param {SetCallback} cb
	 */