refactor: fix types in hot

hot/dev-server.js

@@ -4,9 +4,10 @@
 */
 /* globals __webpack_hash__ */
 if (module.hot) {
+	/** @type {undefined|string} */
 	var lastHash;
 	var upToDate = function upToDate() {
-		return lastHash.indexOf(__webpack_hash__) >= 0;
+		return /** @type {string} */ (lastHash).indexOf(__webpack_hash__) >= 0;
 	};
 	var log = require("./log");
 	var check = function check() {

hot/lazy-compilation-node.js

@@ -3,11 +3,17 @@
 "use strict";
 
 var urlBase = decodeURIComponent(__resourceQuery.slice(1));
+
+/**
+ * @param {{ data: string, onError: (err: Error) => void, active: boolean, module: module }} options options
+ * @returns {() => void} function to destroy response
+ */
 exports.keepAlive = function (options) {
 	var data = options.data;
 	var onError = options.onError;
 	var active = options.active;
 	var module = options.module;
+	/** @type {import("http").IncomingMessage} */
 	var response;
 	var request = (
 		urlBase.startsWith("https") ? require("https") : require("http")
@@ -27,6 +33,10 @@ exports.keepAlive = function (options) {
 			}
 		}
 	);
+
+	/**
+	 * @param {Error} err error
+	 */
 	function errorHandler(err) {
 		err.message =
 			"Problem communicating active modules to the server: " + err.message;

hot/lazy-compilation-web.js

@@ -9,6 +9,7 @@ if (typeof EventSource !== "function") {
 }
 
 var urlBase = decodeURIComponent(__resourceQuery.slice(1));
+/** @type {EventSource | undefined} */
 var activeEventSource;
 var activeKeys = new Map();
 var errorHandlers = new Set();
@@ -19,6 +20,10 @@ var updateEventSource = function updateEventSource() {
 		activeEventSource = new EventSource(
 			urlBase + Array.from(activeKeys.keys()).join("@")
 		);
+		/**
+		 * @this {EventSource}
+		 * @param {Event & { message?: string, filename?: string, lineno?: number, colno?: number, error?: Error }} event event
+		 */
 		activeEventSource.onerror = function (event) {
 			errorHandlers.forEach(function (onError) {
 				onError(
@@ -42,6 +47,10 @@ var updateEventSource = function updateEventSource() {
 	}
 };
 
+/**
+ * @param {{ data: string, onError: (err: Error) => void, active: boolean, module: module }} options options
+ * @returns {() => void} function to destroy response
+ */
 exports.keepAlive = function (options) {
 	var data = options.data;
 	var onError = options.onError;

hot/log-apply-result.js

@@ -2,6 +2,11 @@
 	MIT License http://www.opensource.org/licenses/mit-license.php
 	Author Tobias Koppers @sokra
 */
+
+/**
+ * @param {(string | number)[]} updatedModules updated modules
+ * @param {(string | number)[] | null} renewedModules renewed modules
+ */
 module.exports = function (updatedModules, renewedModules) {
 	var unacceptedModules = updatedModules.filter(function (moduleId) {
 		return renewedModules && renewedModules.indexOf(moduleId) < 0;

hot/log.js

@@ -1,7 +1,14 @@
+/** @typedef {"info" | "warning" | "error"} LogLevel */
+
+/** @type {LogLevel} */
 var logLevel = "info";
 
 function dummy() {}
 
+/**
+ * @param {LogLevel} level log level
+ * @returns {boolean} true, if should log
+ */
 function shouldLog(level) {
 	var shouldLog =
 		(logLevel === "info" && level === "info") ||
@@ -10,6 +17,10 @@ function shouldLog(level) {
 	return shouldLog;
 }
 
+/**
+ * @param {(msg?: string) => void} logFn log function
+ * @returns {(level: LogLevel, msg?: string) => void} function that logs when log level is sufficient
+ */
 function logGroup(logFn) {
 	return function (level, msg) {
 		if (shouldLog(level)) {
@@ -18,6 +29,10 @@ function logGroup(logFn) {
 	};
 }
 
+/**
+ * @param {LogLevel} level log level
+ * @param {string|Error} msg message
+ */
 module.exports = function (level, msg) {
 	if (shouldLog(level)) {
 		if (level === "info") {
@@ -42,10 +57,17 @@ module.exports.groupCollapsed = logGroup(groupCollapsed);
 
 module.exports.groupEnd = logGroup(groupEnd);
 
+/**
+ * @param {LogLevel} level log level
+ */
 module.exports.setLogLevel = function (level) {
 	logLevel = level;
 };
 
+/**
+ * @param {Error} err error
+ * @returns {string} formatted error
+ */
 module.exports.formatError = function (err) {
 	var message = err.message;
 	var stack = err.stack;

hot/only-dev-server.js

@@ -4,9 +4,10 @@
 */
 /*globals __webpack_hash__ */
 if (module.hot) {
+	/** @type {undefined|string} */
 	var lastHash;
 	var upToDate = function upToDate() {
-		return lastHash.indexOf(__webpack_hash__) >= 0;
+		return /** @type {string} */ (lastHash).indexOf(__webpack_hash__) >= 0;
 	};
 	var log = require("./log");
 	var check = function check() {

hot/poll.js

@@ -7,6 +7,9 @@ if (module.hot) {
 	var hotPollInterval = +__resourceQuery.slice(1) || 10 * 60 * 1000;
 	var log = require("./log");
 
+	/**
+	 * @param {boolean=} fromUpdate true when called from update
+	 */
 	var checkForUpdate = function checkForUpdate(fromUpdate) {
 		if (module.hot.status() === "idle") {
 			module.hot

hot/signal.js

@@ -5,6 +5,10 @@
 /*globals __resourceQuery */
 if (module.hot) {
 	var log = require("./log");
+
+	/**
+	 * @param {boolean=} fromUpdate true when called from update
+	 */
 	var checkForUpdate = function checkForUpdate(fromUpdate) {
 		module.hot
 			.check()

test/typesCases/hot/index.ts

@@ -16,4 +16,10 @@ module.hot.apply({
 	ignoreDeclined: true,
 	ignoreErrored: true,
 }).then(() => {});
+module.hot.apply({
+	ignoreUnaccepted: true,
+	ignoreDeclined: true,
+	ignoreErrored: true,
+	onDeclined: (event) => { console.log(event.moduleId) },
+}).then(() => {});
 module.hot.apply().then(() => {});

tsconfig.module.test.json

@@ -10,5 +10,8 @@
     "types": ["node", "./module"],
     "esModuleInterop": true
   },
-  "include": ["test/typesCases/**/*"]
+  "include": [
+    "hot/**/*",
+    "test/typesCases/**/*"
+  ]
 }