diff --git a/lib/cancellationToken.js b/lib/cancellationToken.js
index 76a6a60e72976..0d4569c601b91 100644
--- a/lib/cancellationToken.js
+++ b/lib/cancellationToken.js
@@ -49,7 +49,7 @@ function createCancellationToken(args) {
             },
             resetRequest: function (requestId) {
                 if (currentRequestId_1 !== requestId) {
-                    throw new Error("Mismatched request id, expected " + currentRequestId_1 + ", actual " + requestId);
+                    throw new Error("Mismatched request id, expected ".concat(currentRequestId_1, ", actual ").concat(requestId));
                 }
                 perRequestPipeName_1 = undefined;
             }
diff --git a/lib/tsc.js b/lib/tsc.js
index ab0a0ed2848d7..c2c5c03f365f2 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -45,7 +45,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -98124,14 +98124,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json"))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -98155,13 +98157,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };
diff --git a/lib/tsserver.js b/lib/tsserver.js
index 444cf2ffb3504..fc48171a6eb2b 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -45,7 +45,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -118604,14 +118604,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json" /* Extension.Json */))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -118636,13 +118638,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 1affbcf305f17..ec521e9cc0443 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -44,7 +44,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -118603,14 +118603,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json" /* Extension.Json */))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -118635,13 +118637,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };
diff --git a/lib/typescript.js b/lib/typescript.js
index a1370cc514c7b..530b87683c34c 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -44,7 +44,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -118594,14 +118594,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json" /* Extension.Json */))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -118626,13 +118628,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index 576ee090df80f..59e716a7bdf41 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -44,7 +44,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -118594,14 +118594,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json" /* Extension.Json */))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -118626,13 +118628,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };
diff --git a/lib/typingsInstaller.js b/lib/typingsInstaller.js
index 764e544746138..ed96b50501b72 100644
--- a/lib/typingsInstaller.js
+++ b/lib/typingsInstaller.js
@@ -45,7 +45,7 @@ var __generator = (this && this.__generator) || function (thisArg, body) {
     function verb(n) { return function (v) { return step([n, v]); }; }
     function step(op) {
         if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
             if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
             if (y = 0, t) op = [op[0] & 2, t.value];
             switch (op[0]) {
@@ -118584,14 +118584,16 @@ var ts;
             }
             return setReadFileCache(key, fileName);
         };
-        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersion, onError, shouldCreateNewSourceFile) {
+        var getSourceFileWithCache = getSourceFile ? function (fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
             var key = toPath(fileName);
-            var value = sourceFileCache.get(key);
+            var impliedNodeFormat = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions.impliedNodeFormat : undefined;
+            var forImpliedNodeFormat = sourceFileCache.get(impliedNodeFormat);
+            var value = forImpliedNodeFormat === null || forImpliedNodeFormat === void 0 ? void 0 : forImpliedNodeFormat.get(key);
             if (value)
                 return value;
-            var sourceFile = getSourceFile(fileName, languageVersion, onError, shouldCreateNewSourceFile);
+            var sourceFile = getSourceFile(fileName, languageVersionOrOptions, onError, shouldCreateNewSourceFile);
             if (sourceFile && (ts.isDeclarationFileName(fileName) || ts.fileExtensionIs(fileName, ".json" /* Extension.Json */))) {
-                sourceFileCache.set(key, sourceFile);
+                sourceFileCache.set(impliedNodeFormat, (forImpliedNodeFormat || new ts.Map()).set(key, sourceFile));
             }
             return sourceFile;
         } : undefined;
@@ -118616,13 +118618,15 @@ var ts;
                 var value = readFileCache.get(key);
                 if (value !== undefined && value !== data) {
                     readFileCache.delete(key);
-                    sourceFileCache.delete(key);
+                    sourceFileCache.forEach(function (map) { return map.delete(key); });
                 }
                 else if (getSourceFileWithCache) {
-                    var sourceFile = sourceFileCache.get(key);
-                    if (sourceFile && sourceFile.text !== data) {
-                        sourceFileCache.delete(key);
-                    }
+                    sourceFileCache.forEach(function (map) {
+                        var sourceFile = map.get(key);
+                        if (sourceFile && sourceFile.text !== data) {
+                            map.delete(key);
+                        }
+                    });
                 }
                 originalWriteFile.call.apply(originalWriteFile, __spreadArray([host, fileName, data], rest, false));
             };