feat: add --js and --pascalCaseFiles flags to core,node,express schematics (#3683)

.cz-config.js

@@ -21,6 +21,7 @@ module.exports = {
     { name: 'nextjs', description: 'anything Next specific' },
     { name: 'nest', description: 'anything Nest specific' },
     { name: 'node', description: 'anything Node specific' },
+    { name: 'express', description: 'anything Express specific' },
     { name: 'nx-plugin', description: 'anything Nx Plugin specific' },
     { name: 'react', description: 'anything React specific' },
     { name: 'web', description: 'anything Web specific' },

docs/angular/api-express/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/angular/api-node/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/angular/api-node/schematics/library.md

@@ -66,6 +66,14 @@ Type: `string`
 
 The library name used to import it, like @myorg/my-awesome-lib. Must be a valid npm name.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -82,6 +90,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### publishable
 
 Type: `boolean`

docs/angular/api-workspace/schematics/library.md

@@ -80,6 +80,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/node/api-express/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/node/api-node/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/node/api-node/schematics/library.md

@@ -66,6 +66,14 @@ Type: `string`
 
 The library name used to import it, like @myorg/my-awesome-lib. Must be a valid npm name.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -82,6 +90,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### publishable
 
 Type: `boolean`

docs/node/api-workspace/schematics/library.md

@@ -80,6 +80,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/react/api-express/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/react/api-node/schematics/application.md

@@ -48,6 +48,14 @@ Type: `string`
 
 Frontend project that needs to access this application. This sets up proxy configuration.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -64,6 +72,16 @@ Type: `string`
 
 The name of the application.
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

docs/react/api-node/schematics/library.md

@@ -66,6 +66,14 @@ Type: `string`
 
 The library name used to import it, like @myorg/my-awesome-lib. Must be a valid npm name.
 
+### js
+
+Default: `false`
+
+Type: `boolean`
+
+Generate JavaScript files rather than TypeScript files.
+
 ### linter
 
 Default: `eslint`
@@ -82,6 +90,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### publishable
 
 Type: `boolean`

docs/react/api-workspace/schematics/library.md

@@ -80,6 +80,16 @@ Type: `string`
 
 Library name
 
+### pascalCaseFiles
+
+Alias(es): P
+
+Default: `false`
+
+Type: `boolean`
+
+Use pascal case file names.
+
 ### skipFormat
 
 Default: `false`

e2e/workspace/src/custom-layout.test.ts

@@ -60,9 +60,7 @@ forEachCli('nx', () => {
       expect(workspaceJson).not.toContain('libs/');
 
       const libTestResults = await runCLIAsync(`test ${expressLib}`);
-      expect(libTestResults.stdout).toContain(
-        'No tests found, exiting with code 0'
-      );
+      expect(libTestResults.stdout).toContain(`nx run ${expressLib}:test`);
 
       const appBuildResults = await runCLIAsync(`build ${expressApp}`);
       expect(appBuildResults.stdout).toContain(`nx run ${expressApp}:build`);

packages/express/src/schematics/application/application.spec.ts

@@ -3,6 +3,8 @@ import { createEmptyWorkspace } from '@nrwl/workspace/testing';
 import { runSchematic } from '../../utils/testing';
 import { readJsonInTree } from '@nrwl/workspace';
 
+import { Schema } from './schema.d';
+
 describe('app', () => {
   let appTree: Tree;
 
@@ -12,26 +14,88 @@ describe('app', () => {
   });
 
   it('should generate files', async () => {
-    const tree = await runSchematic('app', { name: 'myNodeApp' }, appTree);
-    expect(tree.readContent('apps/my-node-app/src/main.ts')).toContain(
-      `import * as express from 'express';`
+    const tree = await runSchematic(
+      'app',
+      { name: 'myNodeApp' } as Schema,
+      appTree
     );
+
+    const mainFile = tree.readContent('apps/my-node-app/src/main.ts');
+    expect(mainFile).toContain(`import * as express from 'express';`);
+
+    const tsconfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.json');
+    expect(tsconfig).toMatchInlineSnapshot(`
+      Object {
+        "extends": "../../tsconfig.base.json",
+        "files": Array [],
+        "include": Array [],
+        "references": Array [
+          Object {
+            "path": "./tsconfig.app.json",
+          },
+          Object {
+            "path": "./tsconfig.spec.json",
+          },
+        ],
+      }
+    `);
   });
 
   it('should add types to the tsconfig.app.json', async () => {
-    const tree = await runSchematic('app', { name: 'myNodeApp' }, appTree);
+    const tree = await runSchematic(
+      'app',
+      { name: 'myNodeApp' } as Schema,
+      appTree
+    );
     const tsconfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.app.json');
     expect(tsconfig.compilerOptions.types).toContain('express');
+    expect(tsconfig).toMatchInlineSnapshot(`
+      Object {
+        "compilerOptions": Object {
+          "outDir": "../../dist/out-tsc",
+          "types": Array [
+            "node",
+            "express",
+          ],
+        },
+        "exclude": Array [
+          "**/*.spec.ts",
+        ],
+        "extends": "./tsconfig.json",
+        "include": Array [
+          "**/*.ts",
+        ],
+      }
+    `);
   });
 
-  it('should update tsconfig', async () => {
-    const tree = await runSchematic('app', { name: 'myNodeApp' }, appTree);
-    const tsconfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.json');
-    expect(tsconfig.references).toContainEqual({
-      path: './tsconfig.app.json',
+  describe('--js flag', () => {
+    it('should generate js files instead of ts files', async () => {
+      const tree = await runSchematic(
+        'app',
+        {
+          name: 'myNodeApp',
+          js: true,
+        } as Schema,
+        appTree
+      );
+
+      expect(tree.exists('apps/my-node-app/src/main.js')).toBeTruthy();
+      expect(tree.readContent('apps/my-node-app/src/main.js')).toContain(
+        `import * as express from 'express';`
+      );
+
+      const tsConfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.json');
+      expect(tsConfig.compilerOptions).toEqual({
+        allowJs: true,
       });
-    expect(tsconfig.references).toContainEqual({
-      path: './tsconfig.spec.json',
+
+      const tsConfigApp = readJsonInTree(
+        tree,
+        'apps/my-node-app/tsconfig.app.json'
+      );
+      expect(tsConfigApp.include).toEqual(['**/*.ts', '**/*.js']);
+      expect(tsConfigApp.exclude).toEqual(['**/*.spec.ts', '**/*.spec.js']);
     });
   });
 });

packages/express/src/schematics/application/application.ts

@@ -11,6 +11,7 @@ import { updateJsonInTree } from '@nrwl/workspace';
 import { toFileName, formatFiles } from '@nrwl/workspace';
 import init from '../init/init';
 import { appsDir } from '@nrwl/workspace/src/utils/ast-utils';
+import { maybeJs } from '@nrwl/workspace/src/utils/rules/to-js';
 
 interface NormalizedSchema extends Schema {
   appProjectRoot: Path;
@@ -24,10 +25,10 @@ function addTypes(options: NormalizedSchema): Rule {
   });
 }
 
-function addMainFile(options: NormalizedSchema): Rule {
+function addAppFiles(options: NormalizedSchema): Rule {
   return (host: Tree) => {
     host.overwrite(
-      join(options.appProjectRoot, 'src/main.ts'),
+      maybeJs(options, join(options.appProjectRoot, 'src/main.ts')),
       `/**
  * This is not a production server yet!
  * This is only a minimal backend to get started.
@@ -57,7 +58,7 @@ export default function (schema: Schema): Rule {
     return chain([
       init({ ...options, skipFormat: true }),
       externalSchematic('@nrwl/node', 'application', schema),
-      addMainFile(options),
+      addAppFiles(options),
       addTypes(options),
       formatFiles(options),
     ])(host, context);

packages/express/src/schematics/application/schema.d.ts

@@ -11,4 +11,6 @@ export interface Schema {
   linter: Linter;
   frontendProject?: string;
   babelJest?: boolean;
+  js: boolean;
+  pascalCaseFiles: boolean;
 }

packages/express/src/schematics/application/schema.json

@@ -52,6 +52,17 @@
       "type": "boolean",
       "description": "Use babel instead ts-jest",
       "default": false
+    },
+    "pascalCaseFiles": {
+      "type": "boolean",
+      "description": "Use pascal case file names.",
+      "alias": "P",
+      "default": false
+    },
+    "js": {
+      "type": "boolean",
+      "description": "Generate JavaScript files rather than TypeScript files.",
+      "default": false
     }
   },
   "required": []

packages/node/src/builders/package/utils/update-package-json.ts

@@ -8,7 +8,7 @@ export default function updatePackageJson(
   options: NormalizedBuilderOptions,
   context: BuilderContext
 ) {
-  const mainFile = basename(options.main, '.ts');
+  const mainFile = basename(options.main).replace(/\.[tj]s$/, '');
   const typingsFile = `${mainFile}.d.ts`;
   const mainJsFile = `${mainFile}.js`;
   const packageJson = readJsonFile(

packages/node/src/schematics/application/application.spec.ts

@@ -1,6 +1,5 @@
 import { Tree } from '@angular-devkit/schematics';
-import * as stripJsonComments from 'strip-json-comments';
-import { createEmptyWorkspace, getFileContent } from '@nrwl/workspace/testing';
+import { createEmptyWorkspace } from '@nrwl/workspace/testing';
 import { runSchematic } from '../../utils/testing';
 import { NxJson, readJsonInTree } from '@nrwl/workspace';
 // to break the dependency
@@ -24,7 +23,7 @@ describe('app', () => {
       const project = workspaceJson.projects['my-node-app'];
       expect(project.root).toEqual('apps/my-node-app');
       expect(project.architect).toEqual(
-        jasmine.objectContaining({
+        expect.objectContaining({
           build: {
             builder: '@nrwl/node:build',
             options: {
@@ -85,37 +84,31 @@ describe('app', () => {
       expect(tree.exists(`apps/my-node-app/jest.config.js`)).toBeTruthy();
       expect(tree.exists('apps/my-node-app/src/main.ts')).toBeTruthy();
 
-      expect(tree.readContent('apps/my-node-app/tsconfig.json'))
-        .toMatchInlineSnapshot(`
-        "{
-          \\"extends\\": \\"../../tsconfig.base.json\\",
-          \\"files\\": [],
-          \\"include\\": [],
-          \\"references\\": [
-            {
-              \\"path\\": \\"./tsconfig.app.json\\"
+      const tsconfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.json');
+      expect(tsconfig).toMatchInlineSnapshot(`
+        Object {
+          "extends": "../../tsconfig.base.json",
+          "files": Array [],
+          "include": Array [],
+          "references": Array [
+            Object {
+              "path": "./tsconfig.app.json",
             },
-            {
-              \\"path\\": \\"./tsconfig.spec.json\\"
+            Object {
+              "path": "./tsconfig.spec.json",
+            },
+          ],
         }
-          ]
-        }
-        "
       `);
 
-      const tsconfigApp = JSON.parse(
-        stripJsonComments(
-          getFileContent(tree, 'apps/my-node-app/tsconfig.app.json')
-        )
+      const tsconfigApp = readJsonInTree(
+        tree,
+        'apps/my-node-app/tsconfig.app.json'
       );
       expect(tsconfigApp.compilerOptions.outDir).toEqual('../../dist/out-tsc');
       expect(tsconfigApp.extends).toEqual('./tsconfig.json');
 
-      const eslintrc = JSON.parse(
-        stripJsonComments(
-          getFileContent(tree, 'apps/my-node-app/.eslintrc.json')
-        )
-      );
+      const eslintrc = readJsonInTree(tree, 'apps/my-node-app/.eslintrc.json');
       expect(eslintrc.extends).toEqual('../../.eslintrc.json');
     });
   });
@@ -162,8 +155,7 @@ describe('app', () => {
 
     it('should generate files', async () => {
       const hasJsonValue = ({ path, expectedValue, lookupFn }) => {
-        const content = getFileContent(tree, path);
-        const config = JSON.parse(stripJsonComments(content));
+        const config = readJsonInTree(tree, path);
 
         expect(lookupFn(config)).toEqual(expectedValue);
       };
@@ -243,7 +235,7 @@ describe('app', () => {
       );
 
       expect(tree.exists('apps/my-frontend/proxy.conf.json')).toBeTruthy();
-      const serve = JSON.parse(tree.readContent('workspace.json')).projects[
+      const serve = readJsonInTree(tree, 'workspace.json').projects[
         'my-frontend'
       ].architect.serve;
       expect(serve.options.proxyConfig).toEqual(
@@ -261,7 +253,7 @@ describe('app', () => {
       );
 
       expect(tree.exists('apps/my-frontend/proxy.conf.json')).toBeTruthy();
-      const serve = JSON.parse(tree.readContent('workspace.json')).projects[
+      const serve = readJsonInTree(tree, 'workspace.json').projects[
         'my-frontend'
       ].architect.serve;
       expect(serve.options.proxyConfig).toEqual(
@@ -313,4 +305,75 @@ describe('app', () => {
       `);
     });
   });
+  describe('--js flag', () => {
+    it('should generate js files instead of ts files', async () => {
+      const tree = await runSchematic(
+        'app',
+        {
+          name: 'myNodeApp',
+          js: true,
+        } as Schema,
+        appTree
+      );
+
+      expect(tree.exists(`apps/my-node-app/jest.config.js`)).toBeTruthy();
+      expect(tree.exists('apps/my-node-app/src/main.js')).toBeTruthy();
+
+      const tsConfig = readJsonInTree(tree, 'apps/my-node-app/tsconfig.json');
+      expect(tsConfig.compilerOptions).toEqual({
+        allowJs: true,
+      });
+
+      const tsConfigApp = readJsonInTree(
+        tree,
+        'apps/my-node-app/tsconfig.app.json'
+      );
+      expect(tsConfigApp.include).toEqual(['**/*.ts', '**/*.js']);
+      expect(tsConfigApp.exclude).toEqual(['**/*.spec.ts', '**/*.spec.js']);
+    });
+
+    it('should update workspace.json', async () => {
+      const tree = await runSchematic(
+        'app',
+        { name: 'myNodeApp', js: true } as Schema,
+        appTree
+      );
+      const workspaceJson = readJsonInTree(tree, '/workspace.json');
+      const project = workspaceJson.projects['my-node-app'];
+      const buildTarget = project.architect.build;
+
+      expect(buildTarget.options.main).toEqual('apps/my-node-app/src/main.js');
+      expect(buildTarget.configurations.production.fileReplacements).toEqual([
+        {
+          replace: 'apps/my-node-app/src/environments/environment.js',
+          with: 'apps/my-node-app/src/environments/environment.prod.js',
+        },
+      ]);
+    });
+
+    it('should generate js files for nested libs as well', async () => {
+      const tree = await runSchematic(
+        'app',
+        { name: 'myNodeApp', directory: 'myDir', js: true } as Schema,
+        appTree
+      );
+      expect(
+        tree.exists(`apps/my-dir/my-node-app/jest.config.js`)
+      ).toBeTruthy();
+      expect(tree.exists('apps/my-dir/my-node-app/src/main.js')).toBeTruthy();
+    });
+  });
+
+  describe('--pascalCaseFiles', () => {
+    it(`should notify that this flag doesn't do anything`, async () => {
+      const tree = await runSchematic(
+        'app',
+        { name: 'myNodeApp', pascalCaseFiles: true } as Schema,
+        appTree
+      );
+
+      // @TODO how to spy on context ?
+      // expect(contextLoggerSpy).toHaveBeenCalledWith('NOTE: --pascalCaseFiles is a noop')
+    });
+  });
 });

packages/node/src/schematics/application/application.ts

@@ -25,6 +25,11 @@ import { getProjectConfig } from '@nrwl/workspace';
 import { offsetFromRoot } from '@nrwl/workspace';
 import init from '../init/init';
 import { appsDir } from '@nrwl/workspace/src/utils/ast-utils';
+import {
+  toJS,
+  updateTsConfigsToJs,
+  maybeJs,
+} from '@nrwl/workspace/src/utils/rules/to-js';
 
 interface NormalizedSchema extends Schema {
   appProjectRoot: Path;
@@ -48,7 +53,7 @@ function getBuildConfig(project: any, options: NormalizedSchema) {
     builder: '@nrwl/node:build',
     options: {
       outputPath: join(normalize('dist'), options.appProjectRoot),
-      main: join(project.sourceRoot, 'main.ts'),
+      main: maybeJs(options, join(project.sourceRoot, 'main.ts')),
       tsConfig: join(options.appProjectRoot, 'tsconfig.app.json'),
       assets: [join(project.sourceRoot, 'assets')],
     },
@@ -59,8 +64,14 @@ function getBuildConfig(project: any, options: NormalizedSchema) {
         inspect: false,
         fileReplacements: [
           {
-            replace: join(project.sourceRoot, 'environments/environment.ts'),
-            with: join(project.sourceRoot, 'environments/environment.prod.ts'),
+            replace: maybeJs(
+              options,
+              join(project.sourceRoot, 'environments/environment.ts')
+            ),
+            with: maybeJs(
+              options,
+              join(project.sourceRoot, 'environments/environment.prod.ts')
+            ),
           },
         ],
       },
@@ -106,7 +117,8 @@ function updateWorkspaceJson(options: NormalizedSchema): Rule {
 }
 
 function addAppFiles(options: NormalizedSchema): Rule {
-  return mergeWith(
+  return chain([
+    mergeWith(
       apply(url(`./files/app`), [
         template({
           tmpl: '',
@@ -115,8 +127,16 @@ function addAppFiles(options: NormalizedSchema): Rule {
           offset: offsetFromRoot(options.appProjectRoot),
         }),
         move(options.appProjectRoot),
+        options.js ? toJS() : noop(),
       ])
-  );
+    ),
+    options.pascalCaseFiles
+      ? (tree, context) => {
+          context.logger.warn('NOTE: --pascalCaseFiles is a noop');
+          return tree;
+        }
+      : noop(),
+  ]);
 }
 
 function addProxy(options: NormalizedSchema): Rule {
@@ -147,6 +167,18 @@ function addProxy(options: NormalizedSchema): Rule {
   };
 }
 
+function addJest(options: NormalizedSchema) {
+  return options.unitTestRunner === 'jest'
+    ? externalSchematic('@nrwl/jest', 'jest-project', {
+        project: options.name,
+        setupFile: 'none',
+        skipSerializers: true,
+        supportTsx: options.js,
+        babelJest: options.babelJest,
+      })
+    : noop();
+}
+
 export default function (schema: Schema): Rule {
   return (host: Tree, context: SchematicContext) => {
     const options = normalizeOptions(host, schema);
@@ -157,16 +189,12 @@ export default function (schema: Schema): Rule {
       }),
       addLintFiles(options.appProjectRoot, options.linter),
       addAppFiles(options),
+      options.js
+        ? updateTsConfigsToJs({ projectRoot: options.appProjectRoot })
+        : noop,
       updateWorkspaceJson(options),
       updateNxJson(options),
-      options.unitTestRunner === 'jest'
-        ? externalSchematic('@nrwl/jest', 'jest-project', {
-            project: options.name,
-            setupFile: 'none',
-            skipSerializers: true,
-            babelJest: options.babelJest,
-          })
-        : noop(),
+      addJest(options),
       options.frontendProject ? addProxy(options) : noop(),
       formatFiles(options),
     ])(host, context);

packages/node/src/schematics/application/schema.d.ts

@@ -10,4 +10,6 @@ export interface Schema {
   tags?: string;
   frontendProject?: string;
   babelJest?: boolean;
+  js: boolean;
+  pascalCaseFiles: boolean;
 }

packages/node/src/schematics/application/schema.json

@@ -51,6 +51,17 @@
       "type": "boolean",
       "description": "Use babel instead ts-jest",
       "default": false
+    },
+    "pascalCaseFiles": {
+      "type": "boolean",
+      "description": "Use pascal case file names.",
+      "alias": "P",
+      "default": false
+    },
+    "js": {
+      "type": "boolean",
+      "description": "Generate JavaScript files rather than TypeScript files.",
+      "default": false
     }
   },
   "required": []

packages/node/src/schematics/library/library.spec.ts

@@ -71,15 +71,21 @@ describe('lib', () => {
     it('should create a local tsconfig.json', async () => {
       const tree = await runSchematic('lib', { name: 'myLib' }, appTree);
       const tsconfigJson = readJsonInTree(tree, 'libs/my-lib/tsconfig.json');
-      expect(tsconfigJson.extends).toEqual('../../tsconfig.base.json');
-      expect(tsconfigJson.references).toEqual([
-        {
-          path: './tsconfig.lib.json',
+      expect(tsconfigJson).toMatchInlineSnapshot(`
+        Object {
+          "extends": "../../tsconfig.base.json",
+          "files": Array [],
+          "include": Array [],
+          "references": Array [
+            Object {
+              "path": "./tsconfig.lib.json",
             },
-        {
-          path: './tsconfig.spec.json',
+            Object {
+              "path": "./tsconfig.spec.json",
             },
-      ]);
+          ],
+        }
+      `);
     });
 
     it('should extend the local tsconfig.json with tsconfig.spec.json', async () => {
@@ -280,7 +286,21 @@ describe('lib', () => {
 
       expect(workspaceJson.projects['my-lib'].root).toEqual('libs/my-lib');
 
-      expect(workspaceJson.projects['my-lib'].architect.build).toBeDefined();
+      expect(workspaceJson.projects['my-lib'].architect.build)
+        .toMatchInlineSnapshot(`
+        Object {
+          "builder": "@nrwl/node:package",
+          "options": Object {
+            "assets": Array [
+              "libs/my-lib/*.md",
+            ],
+            "main": "libs/my-lib/src/index.ts",
+            "outputPath": "dist/libs/my-lib",
+            "packageJson": "libs/my-lib/package.json",
+            "tsConfig": "libs/my-lib/tsconfig.lib.json",
+          },
+        }
+      `);
     });
   });
 
@@ -413,4 +433,102 @@ describe('lib', () => {
       `);
     });
   });
+  describe('--js flag', () => {
+    it('should generate js files instead of ts files', async () => {
+      const tree = await runSchematic(
+        'lib',
+        {
+          name: 'myLib',
+          js: true,
+        } as Schema,
+        appTree
+      );
+
+      expect(tree.exists(`libs/my-lib/jest.config.js`)).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/index.js')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/my-lib.js')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/my-lib.spec.js')).toBeTruthy();
+
+      expect(
+        readJsonInTree(tree, 'libs/my-lib/tsconfig.json').compilerOptions
+      ).toEqual({
+        allowJs: true,
+      });
+      expect(
+        readJsonInTree(tree, 'libs/my-lib/tsconfig.lib.json').include
+      ).toEqual(['**/*.ts', '**/*.js']);
+      expect(
+        readJsonInTree(tree, 'libs/my-lib/tsconfig.lib.json').exclude
+      ).toEqual(['**/*.spec.ts', '**/*.spec.js']);
+    });
+
+    it('should update root tsconfig.json with a js file path', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', js: true } as Schema,
+        appTree
+      );
+      const tsconfigJson = readJsonInTree(tree, '/tsconfig.base.json');
+      expect(tsconfigJson.compilerOptions.paths['@proj/my-lib']).toEqual([
+        'libs/my-lib/src/index.js',
+      ]);
+    });
+
+    it('should update architect builder when --buildable', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', buildable: true, js: true } as Schema,
+        appTree
+      );
+      const workspaceJson = readJsonInTree(tree, '/workspace.json');
+
+      expect(workspaceJson.projects['my-lib'].root).toEqual('libs/my-lib');
+
+      expect(
+        workspaceJson.projects['my-lib'].architect.build.options.main
+      ).toEqual('libs/my-lib/src/index.js');
+    });
+
+    it('should generate js files for nested libs as well', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', directory: 'myDir', js: true } as Schema,
+        appTree
+      );
+      expect(tree.exists(`libs/my-dir/my-lib/jest.config.js`)).toBeTruthy();
+      expect(tree.exists('libs/my-dir/my-lib/src/index.js')).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.js')
+      ).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.spec.js')
+      ).toBeTruthy();
+    });
+  });
+
+  describe('--pascalCaseFiles', () => {
+    it('should generate files with upper case names', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', pascalCaseFiles: true } as Schema,
+        appTree
+      );
+      expect(tree.exists('libs/my-lib/src/lib/MyLib.ts')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/MyLib.spec.ts')).toBeTruthy();
+    });
+
+    it('should generate files with upper case names for nested libs as well', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', directory: 'myDir', pascalCaseFiles: true } as Schema,
+        appTree
+      );
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/MyDirMyLib.ts')
+      ).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/MyDirMyLib.spec.ts')
+      ).toBeTruthy();
+    });
+  });
 });

packages/node/src/schematics/library/library.ts

@@ -25,6 +25,11 @@ import {
 } from '@nrwl/workspace';
 import { Schema } from './schema';
 import { libsDir } from '@nrwl/workspace/src/utils/ast-utils';
+import {
+  toJS,
+  updateTsConfigsToJs,
+  maybeJs,
+} from '@nrwl/workspace/src/utils/rules/to-js';
 
 export interface NormalizedSchema extends Schema {
   name: string;
@@ -51,6 +56,7 @@ export default function (schema: NormalizedSchema): Rule {
         importPath: options.importPath,
       }),
       createFiles(options),
+      options.js ? updateTsConfigsToJs(options) : noop(),
       addProject(options),
       formatFiles(options),
     ]);
@@ -103,6 +109,7 @@ function createFiles(options: NormalizedSchema): Rule {
       options.publishable || options.buildable
         ? noop()
         : filter((file) => !file.endsWith('package.json')),
+      options.js ? toJS() : noop(),
     ]),
     MergeStrategy.Overwrite
   );
@@ -122,7 +129,7 @@ function addProject(options: NormalizedSchema): Rule {
           outputPath: `dist/${libsDir(host)}/${options.projectDirectory}`,
           tsConfig: `${options.projectRoot}/tsconfig.lib.json`,
           packageJson: `${options.projectRoot}/package.json`,
-          main: `${options.projectRoot}/src/index.ts`,
+          main: maybeJs(options, `${options.projectRoot}/src/index.ts`),
           assets: [`${options.projectRoot}/*.md`],
         },
       };

packages/node/src/schematics/library/schema.d.ts

@@ -14,4 +14,6 @@ export interface Schema {
   testEnvironment: 'jsdom' | 'node';
   rootDir?: string;
   babelJest?: boolean;
+  js: boolean;
+  pascalCaseFiles: boolean;
 }

packages/node/src/schematics/library/schema.json

@@ -79,6 +79,17 @@
       "type": "boolean",
       "description": "Use babel instead ts-jest",
       "default": false
+    },
+    "pascalCaseFiles": {
+      "type": "boolean",
+      "description": "Use pascal case file names.",
+      "alias": "P",
+      "default": false
+    },
+    "js": {
+      "type": "boolean",
+      "description": "Generate JavaScript files rather than TypeScript files.",
+      "default": false
     }
   },
   "required": ["name"]

packages/workspace/src/schematics/library/files/lib/src/lib/__fileName__.spec.ts__tmpl__

@@ -0,0 +1,7 @@
+import { <%= propertyName %> } from './<%= fileName %>';
+
+describe('<%= propertyName %>', () => {
+    it('should work', () => {
+        expect(<%= propertyName %>()).toEqual('<%= name %>');
+    })
+})

packages/workspace/src/schematics/library/files/lib/src/lib/__fileName__.ts__tmpl__

@@ -0,0 +1,3 @@
+export function <%= propertyName %>(): string {
+    return '<%= name %>';
+}

packages/workspace/src/schematics/library/library.spec.ts

@@ -70,14 +70,21 @@ describe('lib', () => {
     it('should create a local tsconfig.json', async () => {
       const tree = await runSchematic('lib', { name: 'myLib' }, appTree);
       const tsconfigJson = readJsonInTree(tree, 'libs/my-lib/tsconfig.json');
-      expect(tsconfigJson.references).toEqual([
-        {
-          path: './tsconfig.lib.json',
+      expect(tsconfigJson).toMatchInlineSnapshot(`
+        Object {
+          "extends": "../../tsconfig.base.json",
+          "files": Array [],
+          "include": Array [],
+          "references": Array [
+            Object {
+              "path": "./tsconfig.lib.json",
             },
-        {
-          path: './tsconfig.spec.json',
+            Object {
+              "path": "./tsconfig.spec.json",
             },
-      ]);
+          ],
+        }
+      `);
     });
 
     it('should extend the local tsconfig.json with tsconfig.spec.json', async () => {
@@ -126,6 +133,7 @@ describe('lib', () => {
       `);
       expect(tree.exists('libs/my-lib/src/index.ts')).toBeTruthy();
       expect(tree.exists('libs/my-lib/src/lib/my-lib.ts')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/my-lib.spec.ts')).toBeTruthy();
       expect(tree.exists('libs/my-lib/README.md')).toBeTruthy();
 
       const ReadmeContent = tree.readContent('libs/my-lib/README.md');
@@ -183,6 +191,9 @@ describe('lib', () => {
       expect(
         tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.ts')
       ).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.spec.ts')
+      ).toBeTruthy();
       expect(tree.exists('libs/my-dir/my-lib/src/index.ts')).toBeTruthy();
       expect(tree.exists(`libs/my-dir/my-lib/.eslintrc.json`)).toBeTruthy();
     });
@@ -255,14 +266,19 @@ describe('lib', () => {
   });
 
   describe('--unit-test-runner none', () => {
-    it('should not generate test configuration', async () => {
+    it('should not generate test configuration nor spec file', async () => {
       const resultTree = await runSchematic(
         'lib',
         { name: 'myLib', unitTestRunner: 'none' },
         appTree
       );
+
       expect(resultTree.exists('libs/my-lib/tsconfig.spec.json')).toBeFalsy();
       expect(resultTree.exists('libs/my-lib/jest.config.js')).toBeFalsy();
+      expect(
+        resultTree.exists('libs/my-lib/src/lib/my-lib.spec.ts')
+      ).toBeFalsy();
+
       const workspaceJson = readJsonInTree(resultTree, 'workspace.json');
       expect(workspaceJson.projects['my-lib'].architect.test).toBeUndefined();
       expect(workspaceJson.projects['my-lib'].architect.lint)
@@ -334,6 +350,31 @@ describe('lib', () => {
       expect(tree.exists(`libs/my-lib/jest.config.js`)).toBeTruthy();
       expect(tree.exists('libs/my-lib/src/index.js')).toBeTruthy();
       expect(tree.exists('libs/my-lib/src/lib/my-lib.js')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/my-lib.spec.js')).toBeTruthy();
+    });
+
+    it('should update tsconfig.json with compilerOptions.allowJs: true', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', js: true },
+        appTree
+      );
+      expect(
+        readJsonInTree(tree, 'libs/my-lib/tsconfig.json').compilerOptions
+      ).toEqual({
+        allowJs: true,
+      });
+    });
+
+    it('should update tsconfig.lib.json include with **/*.js glob', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', js: true },
+        appTree
+      );
+      expect(
+        readJsonInTree(tree, 'libs/my-lib/tsconfig.lib.json').include
+      ).toEqual(['**/*.ts', '**/*.js']);
     });
 
     it('should update root tsconfig.json with a js file path', async () => {
@@ -359,6 +400,9 @@ describe('lib', () => {
       expect(
         tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.js')
       ).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/my-dir-my-lib.spec.js')
+      ).toBeTruthy();
       expect(tree.exists('libs/my-dir/my-lib/src/index.js')).toBeTruthy();
     });
   });
@@ -407,4 +451,29 @@ describe('lib', () => {
       `);
     });
   });
+  describe('--pascalCaseFiles', () => {
+    it('should generate files with upper case names', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', pascalCaseFiles: true },
+        appTree
+      );
+      expect(tree.exists('libs/my-lib/src/lib/MyLib.ts')).toBeTruthy();
+      expect(tree.exists('libs/my-lib/src/lib/MyLib.spec.ts')).toBeTruthy();
+    });
+
+    it('should generate files with upper case names for nested libs as well', async () => {
+      const tree = await runSchematic(
+        'lib',
+        { name: 'myLib', directory: 'myDir', pascalCaseFiles: true },
+        appTree
+      );
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/MyDirMyLib.ts')
+      ).toBeTruthy();
+      expect(
+        tree.exists('libs/my-dir/my-lib/src/lib/MyDirMyLib.spec.ts')
+      ).toBeTruthy();
+    });
+  });
 });

packages/workspace/src/schematics/library/library.ts

@@ -11,20 +11,25 @@ import {
   move,
   noop,
   SchematicsException,
+  filter,
 } from '@angular-devkit/schematics';
 import { join, normalize } from '@angular-devkit/core';
 import { Schema } from './schema';
 
-import { updateWorkspaceInTree, getNpmScope } from '@nrwl/workspace';
-import { updateJsonInTree } from '@nrwl/workspace';
-import { toFileName, names } from '@nrwl/workspace';
-import { formatFiles } from '@nrwl/workspace';
-import { offsetFromRoot } from '@nrwl/workspace';
+import {
+  updateWorkspaceInTree,
+  getNpmScope,
+  toFileName,
+  names,
+  updateJsonInTree,
+  formatFiles,
+  offsetFromRoot,
+} from '@nrwl/workspace';
 
 import { generateProjectLint, addLintFiles } from '../../utils/lint';
 import { addProjectToNxJsonInTree, libsDir } from '../../utils/ast-utils';
 import { cliCommand } from '../../core/file-utils';
-import { toJS } from '../../utils/rules/to-js';
+import { toJS, updateTsConfigsToJs, maybeJs } from '../../utils/rules/to-js';
 
 export interface NormalizedSchema extends Schema {
   name: string;
@@ -82,17 +87,22 @@ function updateTsConfig(options: NormalizedSchema): Rule {
 }
 
 function createFiles(options: NormalizedSchema): Rule {
+  const { className, name, propertyName } = names(options.name);
+
   return mergeWith(
     apply(url(`./files/lib`), [
       template({
         ...options,
-        ...names(options.name),
+        className,
+        name,
+        propertyName,
         cliCommand: cliCommand(),
         tmpl: '',
         offsetFromRoot: offsetFromRoot(options.projectRoot),
         hasUnitTestRunner: options.unitTestRunner !== 'none',
       }),
       move(options.projectRoot),
+      addTestFiles(options),
       options.js ? toJS() : noop(),
     ])
   );
@@ -102,17 +112,8 @@ function updateNxJson(options: NormalizedSchema): Rule {
   return addProjectToNxJsonInTree(options.name, { tags: options.parsedTags });
 }
 
-export default function (schema: Schema): Rule {
-  return (host: Tree, context: SchematicContext) => {
-    const options = normalizeOptions(host, schema);
-
-    return chain([
-      addLintFiles(options.projectRoot, options.linter),
-      createFiles(options),
-      !options.skipTsConfig ? updateTsConfig(options) : noop(),
-      addProject(options),
-      updateNxJson(options),
-      options.unitTestRunner !== 'none'
+function addJest(options: NormalizedSchema) {
+  return options.unitTestRunner !== 'none'
     ? externalSchematic('@nrwl/jest', 'jest-project', {
         project: options.name,
         setupFile: 'none',
@@ -121,7 +122,21 @@ export default function (schema: Schema): Rule {
         skipSerializers: true,
         testEnvironment: options.testEnvironment,
       })
-        : noop(),
+    : noop();
+}
+
+export default function (schema: Schema): Rule {
+  return (host: Tree, context: SchematicContext) => {
+    const options = normalizeOptions(host, schema);
+
+    return chain([
+      addLintFiles(options.projectRoot, options.linter),
+      createFiles(options),
+      options.js ? updateTsConfigsToJs(options) : noop(),
+      !options.skipTsConfig ? updateTsConfig(options) : noop(),
+      addProject(options),
+      updateNxJson(options),
+      addJest(options),
       formatFiles(options),
     ])(host, context);
   };
@@ -134,9 +149,11 @@ function normalizeOptions(host: Tree, options: Schema): NormalizedSchema {
     : name;
 
   const projectName = projectDirectory.replace(new RegExp('/', 'g'), '-');
-  const fileName = options.simpleModuleName ? name : projectName;
+  const fileName = getCaseAwareFileName({
+    fileName: options.simpleModuleName ? name : projectName,
+    pascalCaseFiles: options.pascalCaseFiles,
+  });
 
-  // const projectRoot = `libs/${projectDirectory}`;
   const projectRoot = `${libsDir(host)}/${projectDirectory}`;
 
   const parsedTags = options.tags
@@ -157,8 +174,17 @@ function normalizeOptions(host: Tree, options: Schema): NormalizedSchema {
   };
 }
 
-function maybeJs(options: NormalizedSchema, path: string): string {
-  return options.js && (path.endsWith('.ts') || path.endsWith('.tsx'))
-    ? path.replace(/\.tsx?$/, '.js')
-    : path;
+function getCaseAwareFileName(options: {
+  pascalCaseFiles: boolean;
+  fileName: string;
+}) {
+  const normalized = names(options.fileName);
+
+  return options.pascalCaseFiles ? normalized.className : normalized.fileName;
+}
+
+function addTestFiles(options: Pick<Schema, 'unitTestRunner'>) {
+  return options.unitTestRunner === 'none'
+    ? filter((path) => !(path.endsWith('.ts') || path.endsWith('.tsx')))
+    : noop();
 }

packages/workspace/src/schematics/library/schema.d.ts

@@ -11,6 +11,7 @@ export interface Schema {
   linter: Linter;
   testEnvironment: 'jsdom' | 'node';
   importPath?: string;
-  js?: boolean;
+  js: boolean;
   babelJest?: boolean;
+  pascalCaseFiles: boolean;
 }

packages/workspace/src/schematics/library/schema.json

@@ -47,8 +47,8 @@
     },
     "skipTsConfig": {
       "type": "boolean",
-      "default": false,
-      "description": "Do not update tsconfig.json for development experience."
+      "description": "Do not update tsconfig.json for development experience.",
+      "default": false
     },
     "testEnvironment": {
       "type": "string",
@@ -65,6 +65,12 @@
       "description": "Use babel instead ts-jest",
       "default": false
     },
+    "pascalCaseFiles": {
+      "type": "boolean",
+      "description": "Use pascal case file names.",
+      "alias": "P",
+      "default": false
+    },
     "js": {
       "type": "boolean",
       "description": "Generate JavaScript files rather than TypeScript files",

packages/workspace/src/utils/rules/to-js.ts

@@ -1,9 +1,18 @@
 import { transpile, JsxEmit, ScriptTarget } from 'typescript';
-import { forEach, Rule, when } from '@angular-devkit/schematics';
+import {
+  forEach,
+  Rule,
+  when,
+  chain,
+  Tree,
+  SchematicsException,
+} from '@angular-devkit/schematics';
 import { normalize } from '@angular-devkit/core';
+import { updateJsonInTree } from '../ast-utils';
 
 export function toJS(): Rule {
-  return forEach(
+  return chain([
+    forEach(
       when(
         (path) => path.endsWith('.ts') || path.endsWith('.tsx'),
         (entry) => {
@@ -19,5 +28,67 @@ export function toJS(): Rule {
           };
         }
       )
-  );
+    ),
+  ]);
+}
+
+export function updateTsConfigsToJs(options: { projectRoot: string }): Rule {
+  const paths = {
+    tsConfig: normalize(`${options.projectRoot}/tsconfig.json`),
+    tsConfigLib: normalize(`${options.projectRoot}/tsconfig.lib.json`),
+    tsConfigApp: normalize(`${options.projectRoot}/tsconfig.app.json`),
+  };
+
+  const getProjectType = (tree: Tree) => {
+    if (tree.exists(paths.tsConfigApp)) {
+      return 'application';
+    }
+    if (tree.exists(paths.tsConfigLib)) {
+      return 'library';
+    }
+
+    throw new SchematicsException(
+      `project is missing tsconfig.lib.json or tsconfig.app.json`
+    );
+  };
+
+  const getConfigFileForUpdate = (tree: Tree) => {
+    const projectType = getProjectType(tree);
+    if (projectType === 'library') {
+      return paths.tsConfigLib;
+    }
+    if (projectType === 'application') {
+      return paths.tsConfigApp;
+    }
+  };
+
+  return chain([
+    updateJsonInTree(paths.tsConfig, (json) => {
+      if (json.compilerOptions) {
+        json.compilerOptions.allowJs = true;
+      } else {
+        json.compilerOptions = { allowJs: true };
+      }
+
+      return json;
+    }),
+    (tree) => {
+      const updateConfigPath = getConfigFileForUpdate(tree);
+
+      return updateJsonInTree(updateConfigPath, (json) => {
+        json.include = uniq([...json.include, '**/*.js']);
+        json.exclude = uniq([...json.exclude, '**/*.spec.js']);
+
+        return json;
+      });
+    },
+  ]);
+}
+
+const uniq = <T extends string[]>(value: T) => [...new Set(value)] as T;
+
+export function maybeJs(options: { js: boolean }, path: string): string {
+  return options.js && (path.endsWith('.ts') || path.endsWith('.tsx'))
+    ? path.replace(/\.tsx?$/, '.js')
+    : path;
 }