Function hotCheck

lib/hmr/HotModuleReplacement.runtime.js:377–426

* @param {boolean | ApplyOptions=} applyOnUpdate apply the update right away * @returns {Promise<ModuleId[] | null>} updated module ids or null

(applyOnUpdate)

	 * @returns {Promise<ModuleId[] | null>} updated module ids or null
	 */
	function hotCheck(applyOnUpdate) {
		if (currentStatus !== "idle") {
			throw new Error("check() is only allowed in idle status");
		}
		return setStatus("check")
			.then($hmrDownloadManifest$)
			.then(function (update) {
				if (!update) {
					return setStatus(applyInvalidatedModules() ? "ready" : "idle").then(
						function () {
							return null;
						}
					);
				}

				return setStatus("prepare").then(function () {
					/** @type {ModuleId[]} */
					var updatedModules = [];
					currentUpdateApplyHandlers = [];

					return Promise.all(
						Object.keys($hmrDownloadUpdateHandlers$).reduce(function (
							promises,
							key
						) {
							$hmrDownloadUpdateHandlers$[key](
								update.c,
								update.r,
								update.m,
								promises,
								/** @type {ApplyHandler[]} */ (currentUpdateApplyHandlers),
								updatedModules,
								update.css,
								update.f
							);
							return promises;
						}, /** @type {Promise<unknown>[]} */ ([]))
					).then(function () {
						return waitForBlockingPromises(function () {
							if (applyOnUpdate) {
								return internalApply(applyOnUpdate);
							}
							return setStatus("ready").then(function () {
								return updatedModules;
							});
						});
					});
				});
			});
	}

	/**
	 * @param {ApplyOptions=} options apply options