diff --git a/build/azure-pipelines/common/createBuild.js b/build/azure-pipelines/common/createBuild.js
index cae7a456142..ec236e80cae 100644
--- a/build/azure-pipelines/common/createBuild.js
+++ b/build/azure-pipelines/common/createBuild.js
@@ -42,7 +42,7 @@ async function main() {
     const aadCredentials = new identity_1.ClientSecretCredential(process.env['AZURE_TENANT_ID'], process.env['AZURE_CLIENT_ID'], process.env['AZURE_CLIENT_SECRET']);
     const client = new cosmos_1.CosmosClient({ endpoint: process.env['AZURE_DOCUMENTDB_ENDPOINT'], aadCredentials });
     const scripts = client.database('builds').container(quality).scripts;
-    await (0, retry_1.retry)(() => scripts.storedProcedure('createBuild').execute('', [Object.assign(Object.assign({}, build), { _partitionKey: '' })]));
+    await (0, retry_1.retry)(() => scripts.storedProcedure('createBuild').execute('', [{ ...build, _partitionKey: '' }]));
 }
 main().then(() => {
     console.log('Build successfully created');
diff --git a/build/azure-pipelines/mixin.js b/build/azure-pipelines/mixin.js
index ba73cdeb083..769ac72a9ee 100644
--- a/build/azure-pipelines/mixin.js
+++ b/build/azure-pipelines/mixin.js
@@ -43,7 +43,7 @@ async function mixinClient(quality) {
             else {
                 fancyLog(ansiColors.blue('[mixin]'), 'Inheriting OSS built-in extensions', builtInExtensions.map(e => e.name));
             }
-            return Object.assign(Object.assign({ webBuiltInExtensions: originalProduct.webBuiltInExtensions }, o), { builtInExtensions });
+            return { webBuiltInExtensions: originalProduct.webBuiltInExtensions, ...o, builtInExtensions };
         }))
             .pipe(productJsonFilter.restore)
             .pipe(es.mapSync((f) => {
@@ -64,7 +64,7 @@ function mixinServer(quality) {
     fancyLog(ansiColors.blue('[mixin]'), `Mixing in server:`);
     const originalProduct = JSON.parse(fs.readFileSync(path.join(__dirname, '..', '..', 'product.json'), 'utf8'));
     const serverProductJson = JSON.parse(fs.readFileSync(serverProductJsonPath, 'utf8'));
-    fs.writeFileSync('product.json', JSON.stringify(Object.assign(Object.assign({}, originalProduct), serverProductJson), undefined, '\t'));
+    fs.writeFileSync('product.json', JSON.stringify({ ...originalProduct, ...serverProductJson }, undefined, '\t'));
     fancyLog(ansiColors.blue('[mixin]'), 'product.json', ansiColors.green('✔︎'));
 }
 function main() {
diff --git a/build/darwin/sign.js b/build/darwin/sign.js
index 08993aebdeb..119019647c7 100644
--- a/build/darwin/sign.js
+++ b/build/darwin/sign.js
@@ -41,14 +41,26 @@ async function main() {
         identity: '99FM488X57',
         'gatekeeper-assess': false
     };
-    const appOpts = Object.assign(Object.assign({}, defaultOpts), { 
+    const appOpts = {
+        ...defaultOpts,
         // TODO(deepak1556): Incorrectly declared type in electron-osx-sign
         ignore: (filePath) => {
             return filePath.includes(gpuHelperAppName) ||
                 filePath.includes(rendererHelperAppName);
-        } });
-    const gpuHelperOpts = Object.assign(Object.assign({}, defaultOpts), { app: path.join(appFrameworkPath, gpuHelperAppName), entitlements: path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-gpu-entitlements.plist'), 'entitlements-inherit': path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-gpu-entitlements.plist') });
-    const rendererHelperOpts = Object.assign(Object.assign({}, defaultOpts), { app: path.join(appFrameworkPath, rendererHelperAppName), entitlements: path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-renderer-entitlements.plist'), 'entitlements-inherit': path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-renderer-entitlements.plist') });
+        }
+    };
+    const gpuHelperOpts = {
+        ...defaultOpts,
+        app: path.join(appFrameworkPath, gpuHelperAppName),
+        entitlements: path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-gpu-entitlements.plist'),
+        'entitlements-inherit': path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-gpu-entitlements.plist'),
+    };
+    const rendererHelperOpts = {
+        ...defaultOpts,
+        app: path.join(appFrameworkPath, rendererHelperAppName),
+        entitlements: path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-renderer-entitlements.plist'),
+        'entitlements-inherit': path.join(baseDir, 'azure-pipelines', 'darwin', 'helper-renderer-entitlements.plist'),
+    };
     let infoPlistString = await fs.readFile(infoPlistPath, 'utf8');
     let infoPlistJson = plist.parse(infoPlistString);
     Object.assign(infoPlistJson, {
diff --git a/build/lib/builtInExtensionsCG.js b/build/lib/builtInExtensionsCG.js
index 435cfcf8035..3292914de37 100644
--- a/build/lib/builtInExtensionsCG.js
+++ b/build/lib/builtInExtensionsCG.js
@@ -18,7 +18,6 @@ const token = process.env['VSCODE_MIXIN_PASSWORD'] || process.env['GITHUB_TOKEN'
 const contentBasePath = 'raw.githubusercontent.com';
 const contentFileNames = ['package.json', 'package-lock.json', 'yarn.lock'];
 async function downloadExtensionDetails(extension) {
-    var _a, _b, _c;
     const extensionLabel = `${extension.name}@${extension.version}`;
     const repository = url.parse(extension.repo).path.substr(1);
     const repositoryContentBaseUrl = `https://${token ? `${token}@` : ''}${contentBasePath}/${repository}/v${extension.version}`;
@@ -56,11 +55,11 @@ async function downloadExtensionDetails(extension) {
         }
     }
     // Validation
-    if (!((_a = results.find(r => r.fileName === 'package.json')) === null || _a === void 0 ? void 0 : _a.body)) {
+    if (!results.find(r => r.fileName === 'package.json')?.body) {
         // throw new Error(`The "package.json" file could not be found for the built-in extension - ${extensionLabel}`);
     }
-    if (!((_b = results.find(r => r.fileName === 'package-lock.json')) === null || _b === void 0 ? void 0 : _b.body) &&
-        !((_c = results.find(r => r.fileName === 'yarn.lock')) === null || _c === void 0 ? void 0 : _c.body)) {
+    if (!results.find(r => r.fileName === 'package-lock.json')?.body &&
+        !results.find(r => r.fileName === 'yarn.lock')?.body) {
         // throw new Error(`The "package-lock.json"/"yarn.lock" could not be found for the built-in extension - ${extensionLabel}`);
     }
 }
diff --git a/build/lib/bundle.js b/build/lib/bundle.js
index 143e64e087d..8c1967d4c68 100644
--- a/build/lib/bundle.js
+++ b/build/lib/bundle.js
@@ -22,10 +22,10 @@ function bundle(entryPoints, config, callback) {
     const allMentionedModulesMap = {};
     entryPoints.forEach((module) => {
         allMentionedModulesMap[module.name] = true;
-        (module.include || []).forEach(function (includedModule) {
+        module.include?.forEach(function (includedModule) {
             allMentionedModulesMap[includedModule] = true;
         });
-        (module.exclude || []).forEach(function (excludedModule) {
+        module.exclude?.forEach(function (excludedModule) {
             allMentionedModulesMap[excludedModule] = true;
         });
     });
diff --git a/build/lib/compilation.js b/build/lib/compilation.js
index 5c160b7b7aa..1841795cefd 100644
--- a/build/lib/compilation.js
+++ b/build/lib/compilation.js
@@ -38,7 +38,7 @@ function createCompile(src, build, emitError) {
     const tsb = require('gulp-tsb');
     const sourcemaps = require('gulp-sourcemaps');
     const projectPath = path.join(__dirname, '../../', src, 'tsconfig.json');
-    const overrideOptions = Object.assign(Object.assign({}, getTypeScriptCompilerOptions(src)), { inlineSources: Boolean(build) });
+    const overrideOptions = { ...getTypeScriptCompilerOptions(src), inlineSources: Boolean(build) };
     if (!build) {
         overrideOptions.inlineSourceMap = true;
     }
diff --git a/build/lib/dependencies.js b/build/lib/dependencies.js
index b6a399267b4..cbc6cec9d81 100644
--- a/build/lib/dependencies.js
+++ b/build/lib/dependencies.js
@@ -36,7 +36,7 @@ function asYarnDependency(prefix, tree) {
     return { name, version, path: dependencyPath, children };
 }
 function getYarnProductionDependencies(cwd) {
-    const raw = cp.execSync('yarn list --json', { cwd, encoding: 'utf8', env: Object.assign(Object.assign({}, process.env), { NODE_ENV: 'production' }), stdio: [null, null, 'inherit'] });
+    const raw = cp.execSync('yarn list --json', { cwd, encoding: 'utf8', env: { ...process.env, NODE_ENV: 'production' }, stdio: [null, null, 'inherit'] });
     const match = /^{"type":"tree".*$/m.exec(raw);
     if (!match || match.length !== 1) {
         throw new Error('Could not parse result of `yarn list --json`');
diff --git a/build/lib/electron.js b/build/lib/electron.js
index 3c4a3a78045..f623e8cb1b0 100644
--- a/build/lib/electron.js
+++ b/build/lib/electron.js
@@ -40,7 +40,7 @@ const darwinCreditsTemplate = product.darwinCredits && _.template(fs.readFileSyn
 function darwinBundleDocumentType(extensions, icon, nameOrSuffix) {
     // If given a suffix, generate a name from it. If not given anything, default to 'document'
     if (isDocumentSuffix(nameOrSuffix) || !nameOrSuffix) {
-        nameOrSuffix = icon.charAt(0).toUpperCase() + icon.slice(1) + ' ' + (nameOrSuffix !== null && nameOrSuffix !== void 0 ? nameOrSuffix : 'document');
+        nameOrSuffix = icon.charAt(0).toUpperCase() + icon.slice(1) + ' ' + (nameOrSuffix ?? 'document');
     }
     return {
         name: nameOrSuffix,
diff --git a/build/lib/eslint/vscode-dts-create-func.js b/build/lib/eslint/vscode-dts-create-func.js
index 5a27bf51c80..e9ec659cef1 100644
--- a/build/lib/eslint/vscode-dts-create-func.js
+++ b/build/lib/eslint/vscode-dts-create-func.js
@@ -14,9 +14,8 @@ module.exports = new class ApiLiteralOrTypes {
     create(context) {
         return {
             ['TSDeclareFunction Identifier[name=/create.*/]']: (node) => {
-                var _a;
                 const decl = node.parent;
-                if (((_a = decl.returnType) === null || _a === void 0 ? void 0 : _a.typeAnnotation.type) !== experimental_utils_1.AST_NODE_TYPES.TSTypeReference) {
+                if (decl.returnType?.typeAnnotation.type !== experimental_utils_1.AST_NODE_TYPES.TSTypeReference) {
                     return;
                 }
                 if (decl.returnType.typeAnnotation.typeName.type !== experimental_utils_1.AST_NODE_TYPES.Identifier) {
diff --git a/build/lib/eslint/vscode-dts-event-naming.js b/build/lib/eslint/vscode-dts-event-naming.js
index a1a1c1097f1..1e376cca734 100644
--- a/build/lib/eslint/vscode-dts-event-naming.js
+++ b/build/lib/eslint/vscode-dts-event-naming.js
@@ -25,8 +25,7 @@ module.exports = new (_a = class ApiEventNaming {
             const verbs = new Set(config.verbs);
             return {
                 ['TSTypeAnnotation TSTypeReference Identifier[name="Event"]']: (node) => {
-                    var _a, _b;
-                    const def = (_b = (_a = node.parent) === null || _a === void 0 ? void 0 : _a.parent) === null || _b === void 0 ? void 0 : _b.parent;
+                    const def = node.parent?.parent?.parent;
                     const ident = this.getIdent(def);
                     if (!ident) {
                         // event on unknown structure...
diff --git a/build/lib/eslint/vscode-dts-provider-naming.js b/build/lib/eslint/vscode-dts-provider-naming.js
index 924c26ecbb3..0d94a8a9223 100644
--- a/build/lib/eslint/vscode-dts-provider-naming.js
+++ b/build/lib/eslint/vscode-dts-provider-naming.js
@@ -17,8 +17,7 @@ module.exports = new (_a = class ApiProviderNaming {
             const allowed = new Set(config.allowed);
             return {
                 ['TSInterfaceDeclaration[id.name=/.+Provider/] TSMethodSignature']: (node) => {
-                    var _a;
-                    const interfaceName = ((_a = node.parent) === null || _a === void 0 ? void 0 : _a.parent).id.name;
+                    const interfaceName = node.parent?.parent.id.name;
                     if (allowed.has(interfaceName)) {
                         // allowed
                         return;
diff --git a/build/lib/extensions.js b/build/lib/extensions.js
index 3707c802df7..c4ee9d010f3 100644
--- a/build/lib/extensions.js
+++ b/build/lib/extensions.js
@@ -115,7 +115,10 @@ function fromLocalWebpack(extensionPath, webpackConfigFileName) {
                     result.emit('error', compilation.warnings.join('\n'));
                 }
             };
-            const webpackConfig = Object.assign(Object.assign({}, require(webpackConfigPath)), { mode: 'production' });
+            const webpackConfig = {
+                ...require(webpackConfigPath),
+                ...{ mode: 'production' }
+            };
             const relativeOutputPath = path.relative(extensionPath, webpackConfig.output.path);
             return webpackGulp(webpackConfig, webpack, webpackDone)
                 .pipe(es.through(function (data) {
@@ -411,7 +414,7 @@ async function webpackExtensions(taskName, isWatch, webpackConfigLocations) {
                     reject();
                 }
                 else {
-                    reporter(stats === null || stats === void 0 ? void 0 : stats.toJson());
+                    reporter(stats?.toJson());
                 }
             });
         }
@@ -422,7 +425,7 @@ async function webpackExtensions(taskName, isWatch, webpackConfigLocations) {
                     reject();
                 }
                 else {
-                    reporter(stats === null || stats === void 0 ? void 0 : stats.toJson());
+                    reporter(stats?.toJson());
                     resolve();
                 }
             });
diff --git a/build/lib/layersChecker.js b/build/lib/layersChecker.js
index 658ccfc516c..021c58c17fe 100644
--- a/build/lib/layersChecker.js
+++ b/build/lib/layersChecker.js
@@ -209,15 +209,14 @@ let hasErrors = false;
 function checkFile(program, sourceFile, rule) {
     checkNode(sourceFile);
     function checkNode(node) {
-        var _a, _b;
         if (node.kind !== ts.SyntaxKind.Identifier) {
             return ts.forEachChild(node, checkNode); // recurse down
         }
         const text = node.getText(sourceFile);
-        if ((_a = rule.allowedTypes) === null || _a === void 0 ? void 0 : _a.some(allowed => allowed === text)) {
+        if (rule.allowedTypes?.some(allowed => allowed === text)) {
             return; // override
         }
-        if ((_b = rule.disallowedTypes) === null || _b === void 0 ? void 0 : _b.some(disallowed => disallowed === text)) {
+        if (rule.disallowedTypes?.some(disallowed => disallowed === text)) {
             const { line, character } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
             console.log(`[build/lib/layersChecker.ts]: Reference to '${text}' violates layer '${rule.target}' (${sourceFile.fileName} (${line + 1},${character + 1})`);
             hasErrors = true;
diff --git a/build/lib/preLaunch.js b/build/lib/preLaunch.js
index b1ecd53b5d9..ba8ba1c0382 100644
--- a/build/lib/preLaunch.js
+++ b/build/lib/preLaunch.js
@@ -13,7 +13,7 @@ const rootDir = path.resolve(__dirname, '..', '..');
 function runProcess(command, args = []) {
     return new Promise((resolve, reject) => {
         const child = (0, child_process_1.spawn)(command, args, { cwd: rootDir, stdio: 'inherit', env: process.env });
-        child.on('exit', err => !err ? resolve() : process.exit(err !== null && err !== void 0 ? err : 1));
+        child.on('exit', err => !err ? resolve() : process.exit(err ?? 1));
         child.on('error', reject);
     });
 }
@@ -22,7 +22,7 @@ async function exists(subdir) {
         await fs_1.promises.stat(path.join(rootDir, subdir));
         return true;
     }
-    catch (_a) {
+    catch {
         return false;
     }
 }
diff --git a/build/lib/standalone.js b/build/lib/standalone.js
index 91a693ce233..f2116eb159e 100644
--- a/build/lib/standalone.js
+++ b/build/lib/standalone.js
@@ -27,7 +27,6 @@ function writeFile(filePath, contents) {
     fs.writeFileSync(filePath, contents);
 }
 function extractEditor(options) {
-    var _a;
     const ts = require('typescript');
     const tsConfig = JSON.parse(fs.readFileSync(path.join(options.sourcesRoot, 'tsconfig.monaco.json')).toString());
     let compilerOptions;
@@ -49,7 +48,7 @@ function extractEditor(options) {
     // Take the extra included .d.ts files from `tsconfig.monaco.json`
     options.typings = tsConfig.include.filter(includedFile => /\.d\.ts$/.test(includedFile));
     // Add extra .d.ts files from `node_modules/@types/`
-    if (Array.isArray((_a = options.compilerOptions) === null || _a === void 0 ? void 0 : _a.types)) {
+    if (Array.isArray(options.compilerOptions?.types)) {
         options.compilerOptions.types.forEach((type) => {
             options.typings.push(`../node_modules/@types/${type}/index.d.ts`);
         });
diff --git a/build/lib/util.js b/build/lib/util.js
index e1fbc80f5d8..2c97613c1b9 100644
--- a/build/lib/util.js
+++ b/build/lib/util.js
@@ -304,7 +304,6 @@ function getElectronVersion() {
 }
 exports.getElectronVersion = getElectronVersion;
 function acquireWebNodePaths() {
-    var _a;
     const root = path.join(__dirname, '..', '..');
     const webPackageJSON = path.join(root, '/remote/web', 'package.json');
     const webPackages = JSON.parse(fs.readFileSync(webPackageJSON, 'utf8')).dependencies;
@@ -312,7 +311,7 @@ function acquireWebNodePaths() {
     for (const key of Object.keys(webPackages)) {
         const packageJSON = path.join(root, 'node_modules', key, 'package.json');
         const packageData = JSON.parse(fs.readFileSync(packageJSON, 'utf8'));
-        let entryPoint = (_a = packageData.browser) !== null && _a !== void 0 ? _a : packageData.main;
+        let entryPoint = packageData.browser ?? packageData.main;
         // On rare cases a package doesn't have an entrypoint so we assume it has a dist folder with a min.js
         if (!entryPoint) {
             // TODO @lramos15 remove this when jschardet adds an entrypoint so we can warn on all packages w/out entrypoint
diff --git a/build/tsconfig.json b/build/tsconfig.json
index 10a454e94ad..a0378eefc23 100644
--- a/build/tsconfig.json
+++ b/build/tsconfig.json
@@ -1,6 +1,7 @@
 {
 	"compilerOptions": {
-		"target": "es2017",
+		"target": "es2020",
+		"lib": ["ES2020"],
 		"module": "commonjs",
 		"removeComments": false,
 		"preserveConstEnums": true,