alexpeng-cognition · devin-ai-integration · Sep 11, 2025 · Sep 11, 2025
diff --git a/lib/AbstractMethodError.js b/lib/AbstractMethodError.js
@@ -13,9 +13,8 @@ const CURRENT_METHOD_REGEXP = /at ([a-zA-Z0-9_.]*)/;
  * @param {string=} method method name
  * @returns {string} message
  */
-function createMessage(method) {
-	return `Abstract method${method ? ` ${method}` : ""}. Must be overridden.`;
-}
+const createMessage = (method) =>
+	`Abstract method${method ? ` ${method}` : ""}. Must be overridden.`;
 
 /**
  * @constructor

diff --git a/lib/DefinePlugin.js b/lib/DefinePlugin.js
@@ -127,10 +127,10 @@ class RuntimeValue {
  * @param {DestructuringAssignmentProperties | undefined} properties properties
  * @returns {Set<string> | undefined} used keys
  */
-function getObjKeys(properties) {
+const getObjKeys = (properties) => {
 	if (!properties) return;
 	return new Set([...properties].map((p) => p.id));
-}
+};
 
 /** @typedef {Set<string> | null} ObjKeys */
 /** @typedef {boolean | undefined | null} AsiSafe */

diff --git a/lib/RuntimeTemplate.js b/lib/RuntimeTemplate.js
@@ -325,9 +325,7 @@ class RuntimeTemplate {
 	forEach(variable, array, body) {
 		return this.supportsForOf()
 			? `for(const ${variable} of ${array}) {\n${Template.indent(body)}\n}`
-			: `${array}.forEach(function(${variable}) {\n${Template.indent(
-					body
-				)}\n});`;
+			: `${array}.forEach((${variable}) => {\n${Template.indent(body)}\n});`;
 	}
 
 	/**

diff --git a/lib/async-modules/AwaitDependenciesInitFragment.js b/lib/async-modules/AwaitDependenciesInitFragment.js
@@ -55,15 +55,15 @@ class AwaitDependenciesInitFragment extends InitFragment {
 		const asyncModuleValues = [...this.dependencies.values()].join(", ");
 
 		const templateInput = [
-			`var __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${asyncModuleValues}]);`
+			`const __webpack_async_dependencies__ = __webpack_handle_async_dependencies__([${asyncModuleValues}]);`
 		];
 
 		if (
 			this.dependencies.size === 1 ||
 			!runtimeTemplate.supportsDestructuring()
 		) {
 			templateInput.push(
-				"var __webpack_async_dependencies_result__ = (__webpack_async_dependencies__.then ? (await __webpack_async_dependencies__)() : __webpack_async_dependencies__);"
+				"const __webpack_async_dependencies_result__ = (__webpack_async_dependencies__.then ? (await __webpack_async_dependencies__)() : __webpack_async_dependencies__);"
 			);
 			for (const [index, importVar] of importVars.entries()) {
 				templateInput.push(

diff --git a/lib/container/ContainerEntryModule.js b/lib/container/ContainerEntryModule.js
@@ -226,7 +226,7 @@ class ContainerEntryModule extends Module {
 			`var init = ${runtimeTemplate.basicFunction("shareScope, initScope", [
 				`if (!${RuntimeGlobals.shareScopeMap}) return;`,
 				`var name = ${JSON.stringify(this._shareScope)}`,
-				`var oldScope = ${RuntimeGlobals.shareScopeMap}[name];`,
+				`const oldScope = ${RuntimeGlobals.shareScopeMap}[name];`,
 				'if(oldScope && oldScope !== shareScope) throw new Error("Container initialization failed as it has already been initialized with a different share scope");',
 				`${RuntimeGlobals.shareScopeMap}[name] = shareScope;`,
 				`return ${RuntimeGlobals.initializeSharing}(name, initScope);`

diff --git a/lib/container/FallbackModule.js b/lib/container/FallbackModule.js
@@ -134,9 +134,9 @@ class FallbackModule extends Module {
 			chunkGraph.getModuleId(/** @type {Module} */ (moduleGraph.getModule(dep)))
 		);
 		const code = Template.asString([
-			`var ids = ${JSON.stringify(ids)};`,
-			"var error, result, i = 0;",
-			`var loop = ${runtimeTemplate.basicFunction("next", [
+			`const ids = ${JSON.stringify(ids)};`,
+			"let error, result, i = 0;",
+			`const loop = ${runtimeTemplate.basicFunction("next", [
 				"while(i < ids.length) {",
 				Template.indent([
 					`try { next = ${RuntimeGlobals.require}(ids[i++]); } catch(e) { return handleError(e); }`,
@@ -145,11 +145,11 @@ class FallbackModule extends Module {
 				"}",
 				"if(error) throw error;"
 			])}`,
-			`var handleResult = ${runtimeTemplate.basicFunction("result", [
+			`const handleResult = ${runtimeTemplate.basicFunction("result", [
 				"if(result) return result;",
 				"return loop();"
 			])};`,
-			`var handleError = ${runtimeTemplate.basicFunction("e", [
+			`const handleError = ${runtimeTemplate.basicFunction("e", [
 				"error = e;",
 				"return loop();"
 			])};`,

diff --git a/lib/container/RemoteRuntimeModule.js b/lib/container/RemoteRuntimeModule.js
@@ -76,9 +76,9 @@ class RemoteRuntimeModule extends RuntimeModule {
 				`if(${RuntimeGlobals.hasOwnProperty}(chunkMapping, chunkId)) {`,
 				Template.indent([
 					`chunkMapping[chunkId].forEach(${runtimeTemplate.basicFunction("id", [
-						`var getScope = ${RuntimeGlobals.currentRemoteGetScope};`,
+						`let getScope = ${RuntimeGlobals.currentRemoteGetScope};`,
 						"if(!getScope) getScope = [];",
-						"var data = idToExternalAndNameMapping[id];",
+						"const data = idToExternalAndNameMapping[id];",
 						"if(getScope.indexOf(data) >= 0) return;",
 						"getScope.push(data);",
 						"if(data.p) return promises.push(data.p);",
@@ -98,10 +98,10 @@ class RemoteRuntimeModule extends RuntimeModule {
 							[
 								"try {",
 								Template.indent([
-									"var promise = fn(arg1, arg2);",
+									"const promise = fn(arg1, arg2);",
 									"if(promise && promise.then) {",
 									Template.indent([
-										`var p = promise.then(${runtimeTemplate.returningFunction(
+										`const p = promise.then(${runtimeTemplate.returningFunction(
 											"next(result, d)",
 											"result"
 										)}, onError);`,

diff --git a/lib/css/CssLoadingRuntimeModule.js b/lib/css/CssLoadingRuntimeModule.js
@@ -191,18 +191,18 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 				: "// data-webpack is not used as build has no uniqueName",
 			withLoading || withHmr
 				? Template.asString([
-						'var loadingAttribute = "data-webpack-loading";',
+						'const loadingAttribute = "data-webpack-loading";',
 						`var loadStylesheet = ${runtimeTemplate.basicFunction(
 							`chunkId, url, done${
 								withFetchPriority ? ", fetchPriority" : ""
 							}${withHmr ? ", hmr" : ""}`,
 							[
-								'var link, needAttach, key = "chunk-" + chunkId;',
+								'let link, needAttach; const key = "chunk-" + chunkId;',
 								withHmr ? "if(!hmr) {" : "",
-								'var links = document.getElementsByTagName("link");',
-								"for(var i = 0; i < links.length; i++) {",
+								'const links = document.getElementsByTagName("link");',
+								"for(let i = 0; i < links.length; i++) {",
 								Template.indent([
-									"var l = links[i];",
+									"const l = links[i];",
 									`if(l.rel == "stylesheet" && (${
 										withHmr
 											? 'l.href.startsWith(url) || l.getAttribute("href").startsWith(url)'
@@ -235,7 +235,7 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 								)};`,
 								"if(link.getAttribute(loadingAttribute)) {",
 								Template.indent([
-									`var timeout = setTimeout(onLinkComplete.bind(null, undefined, { type: 'timeout', target: link }), ${loadTimeout});`,
+									`const timeout = setTimeout(onLinkComplete.bind(null, undefined, { type: 'timeout', target: link }), ${loadTimeout});`,
 									"link.onerror = onLinkComplete.bind(null, link.onerror);",
 									"link.onload = onLinkComplete.bind(null, link.onload);"
 								]),
@@ -256,7 +256,7 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 							`chunkId, promises${withFetchPriority ? " , fetchPriority" : ""}`,
 							[
 								"// css chunk loading",
-								`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
+								`let installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
 								'if(installedChunkData !== 0) { // 0 means "already installed".',
 								Template.indent([
 									"",
@@ -270,17 +270,17 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 											: `if(${hasCssMatcher("chunkId")}) {`,
 										Template.indent([
 											"// setup Promise in chunk cache",
-											`var promise = new Promise(${runtimeTemplate.expressionFunction(
+											`const promise = new Promise(${runtimeTemplate.expressionFunction(
 												"installedChunkData = installedChunks[chunkId] = [resolve, reject]",
 												"resolve, reject"
 											)});`,
 											"promises.push(installedChunkData[2] = promise);",
 											"",
 											"// start chunk loading",
-											`var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
+											`const url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
 											"// create error before stack unwound to get useful stacktrace later",
-											"var error = new Error();",
-											`var loadingEnded = ${runtimeTemplate.basicFunction(
+											"const error = new Error();",
+											`const loadingEnded = ${runtimeTemplate.basicFunction(
 												"event",
 												[
 													`if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId)) {`,
@@ -291,8 +291,8 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 														Template.indent([
 															'if(event.type !== "load") {',
 															Template.indent([
-																"var errorType = event && event.type;",
-																"var realHref = event && event.target && event.target.href;",
+																"const errorType = event && event.type;",
+																"const realHref = event && event.target && event.target.href;",
 																"error.message = 'Loading css chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
 																"error.name = 'ChunkLoadError';",
 																"error.type = errorType;",
@@ -349,7 +349,7 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 								: "",
 							linkPrefetch.call(
 								Template.asString([
-									"var link = document.createElement('link');",
+									"const link = document.createElement('link');",
 									charset ? "link.charset = 'utf-8';" : "",
 									crossOriginLoading
 										? `link.crossOrigin = ${JSON.stringify(
@@ -389,7 +389,7 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 								: "",
 							linkPreload.call(
 								Template.asString([
-									"var link = document.createElement('link');",
+									"const link = document.createElement('link');",
 									charset ? "link.charset = 'utf-8';" : "",
 									`if (${RuntimeGlobals.scriptNonce}) {`,
 									Template.indent(
@@ -422,20 +422,20 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 				: "// no preloaded",
 			withHmr
 				? Template.asString([
-						"var oldTags = [];",
-						"var newTags = [];",
+						"const oldTags = [];",
+						"const newTags = [];",
 						`var applyHandler = ${runtimeTemplate.basicFunction("options", [
 							`return { dispose: ${runtimeTemplate.basicFunction("", [
 								"while(oldTags.length) {",
 								Template.indent([
-									"var oldTag = oldTags.pop();",
+									"const oldTag = oldTags.pop();",
 									"if(oldTag.parentNode) oldTag.parentNode.removeChild(oldTag);"
 								]),
 								"}"
 							])}, apply: ${runtimeTemplate.basicFunction("", [
 								"while(newTags.length) {",
 								Template.indent([
-									"var newTag = newTags.pop();",
+									"const newTag = newTags.pop();",
 									"newTag.sheet.disabled = false"
 								]),
 								"}"
@@ -458,9 +458,9 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 									: "",
 								"applyHandlers.push(applyHandler);",
 								`chunkIds.forEach(${runtimeTemplate.basicFunction("chunkId", [
-									`var filename = ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
-									`var url = ${RuntimeGlobals.publicPath} + filename;`,
-									"var oldTag = loadStylesheet(chunkId, url);",
+									`const filename = ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
+									`const url = ${RuntimeGlobals.publicPath} + filename;`,
+									"const oldTag = loadStylesheet(chunkId, url);",
 									"if(!oldTag) return;",
 									`promises.push(new Promise(${runtimeTemplate.basicFunction(
 										"resolve, reject",
@@ -470,8 +470,8 @@ class CssLoadingRuntimeModule extends RuntimeModule {
 												[
 													'if(event.type !== "load") {',
 													Template.indent([
-														"var errorType = event && event.type;",
-														"var realHref = event && event.target && event.target.href;",
+														"const errorType = event && event.type;",
+														"const realHref = event && event.target && event.target.href;",
 														"error.message = 'Loading css hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
 														"error.name = 'ChunkLoadError';",
 														"error.type = errorType;",

diff --git a/lib/css/CssModulesPlugin.js b/lib/css/CssModulesPlugin.js
@@ -411,7 +411,7 @@ class CssModulesPlugin {
 
 						const hmrCode = Template.asString([
 							"",
-							`var __webpack_css_exports__ = ${stringifiedExports};`,
+							`const __webpack_css_exports__ = ${stringifiedExports};`,
 							"// only invalidate when locals change",
 							"if (module.hot.data && module.hot.data.__webpack_css_exports__ && module.hot.data.__webpack_css_exports__ != __webpack_css_exports__) {",
 							Template.indent("module.hot.invalidate();"),

diff --git a/lib/esm/ModuleChunkLoadingRuntimeModule.js b/lib/esm/ModuleChunkLoadingRuntimeModule.js
@@ -205,7 +205,7 @@ class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
 							hasJsMatcher !== false
 								? Template.indent([
 										"// import() chunk loading for javascript",
-										`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
+										`const installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
 										'if(installedChunkData !== 0) { // 0 means "already installed".',
 										Template.indent([
 											"",
@@ -269,7 +269,7 @@ class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
 							"installedChunks[chunkId] = null;",
 							linkPrefetch.call(
 								Template.asString([
-									"var link = document.createElement('link');",
+									"const link = document.createElement('link');",
 									charset ? "link.charset = 'utf-8';" : "",
 									crossOriginLoading
 										? `link.crossOrigin = ${JSON.stringify(
@@ -309,7 +309,7 @@ class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
 							"installedChunks[chunkId] = null;",
 							linkPreload.call(
 								Template.asString([
-									"var link = document.createElement('link');",
+									"const link = document.createElement('link');",
 									charset ? "link.charset = 'utf-8';" : "",
 									`if (${RuntimeGlobals.scriptNonce}) {`,
 									Template.indent(
@@ -364,10 +364,10 @@ class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
 								"resolve, reject",
 								[
 									"// start update chunk loading",
-									`var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId);`,
+									`const url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId);`,
 									`var onResolve = ${runtimeTemplate.basicFunction("obj", [
-										`var updatedModules = obj.${RuntimeGlobals.esmModules};`,
-										`var updatedRuntime = obj.${RuntimeGlobals.esmRuntime};`,
+										`const updatedModules = obj.${RuntimeGlobals.esmModules};`,
+										`const updatedRuntime = obj.${RuntimeGlobals.esmRuntime};`,
 										"if(updatedRuntime) currentUpdateRuntime.push(updatedRuntime);",
 										"for(var moduleId in updatedModules) {",
 										Template.indent([
@@ -382,7 +382,7 @@ class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
 										"resolve(obj);"
 									])};`,
 									`var onReject = ${runtimeTemplate.basicFunction("error", [
-										"var errorMsg = error.message || 'unknown reason';",
+										"const errorMsg = error.message || 'unknown reason';",
 										"error.message = 'Loading hot update chunk ' + chunkId + ' failed.\\n(' + errorMsg + ')';",
 										"error.name = 'ChunkLoadError';",
 										"reject(error);"

diff --git a/lib/hmr/LazyCompilationPlugin.js b/lib/hmr/LazyCompilationPlugin.js
@@ -239,10 +239,10 @@ class LazyCompilationProxyModule extends Module {
 				request: clientDep.userRequest,
 				runtimeRequirements
 			})}`,
-			`var data = ${JSON.stringify(this.data)};`
+			`const data = ${JSON.stringify(this.data)};`
 		]);
 		const keepActive = Template.asString([
-			`var dispose = client.keepAlive({ data: data, active: ${JSON.stringify(
+			`const dispose = client.keepAlive({ data: data, active: ${JSON.stringify(
 				Boolean(block)
 			)}, module: module, onError: onError });`
 		]);
@@ -277,8 +277,8 @@ class LazyCompilationProxyModule extends Module {
 		} else {
 			source = Template.asString([
 				client,
-				"var resolveSelf, onError;",
-				"module.exports = new Promise(function(resolve, reject) { resolveSelf = resolve; onError = reject; });",
+				"let resolveSelf, onError;",
+				"module.exports = new Promise((resolve, reject) => { resolveSelf = resolve; onError = reject; });",
 				"if (module.hot) {",
 				Template.indent([
 					"module.hot.accept();",

diff --git a/lib/javascript/CommonJsChunkFormatPlugin.js b/lib/javascript/CommonJsChunkFormatPlugin.js
@@ -106,11 +106,11 @@ class CommonJsChunkFormatPlugin {
 							runtimeTemplate.supportsArrowFunction() ? "() => " : "function() "
 						}{\n`
 					);
-					entrySource.add("var exports = {};\n");
+					entrySource.add("const exports = {};\n");
 					entrySource.add(source);
 					entrySource.add(";\n\n// load runtime\n");
 					entrySource.add(
-						`var ${RuntimeGlobals.require} = require(${JSON.stringify(
+						`const ${RuntimeGlobals.require} = require(${JSON.stringify(
 							runtimePath
 						)});\n`
 					);

diff --git a/lib/javascript/JavascriptModulesPlugin.js b/lib/javascript/JavascriptModulesPlugin.js
@@ -1507,7 +1507,7 @@ class JavascriptModulesPlugin {
 		)
 			? Template.asString([
 					`var execOptions = { id: moduleId, module: module, factory: __webpack_modules__[moduleId], require: ${RuntimeGlobals.require} };`,
-					`${RuntimeGlobals.interceptModuleExecution}.forEach(function(handler) { handler(execOptions); });`,
+					`${RuntimeGlobals.interceptModuleExecution}.forEach((handler) => { handler(execOptions); });`,
 					"module = execOptions.module;",
 					"execOptions.factory.call(module.exports, module, module.exports, execOptions.require);"
 				])