The supported versions of Node.js support up to ES2018, the only reason why we don't use ES2017+ is because native `async` and `await` don't work with zone.js
See: https://github.com/angular/angular/issues/31730
With this change, we also ensure that we don't downlevel the server bundle to ES5 which is unnecessary.
Closes: #17794
TypeScript 3.9 requires tslib 2.0.0, with this change we;
- Update tslib existing and new workspaces to use tslib 2.0.0
- Update new and existing libraries to use tslib 2.0.0 as a direct depedency.
Tslib version is bound to the TypeScript version used to compile the library. Thus, we shouldn't list `tslib` as a `peerDependencies`. This is because, a user can install libraries which have been compiled with older versions of TypeScript and thus require multiple `tslib` versions to be installed.
Closes: #17753
Reference: TOOL-1374
Protractor `elementExplorer` debugger and element explorer cannot be used for Node.js 8+ since it relied on `_debugger` module.
In protractor version 5, this resulted in the below error:
```
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
: Compiled successfully.
[10:25:35] I/direct - Using ChromeDriver directly...
[10:25:37] I/protractor -
[10:25:37] I/protractor - ------- Element Explorer -------
[10:25:37] I/protractor - Starting WebDriver debugger in a child process. Element Explorer is still beta, please report issues at github.com/angular/protractor
[10:25:37] I/protractor -
[10:25:37] I/protractor - Type <tab> to see a list of locator strategies.
[10:25:37] I/protractor - Use the `list` helper function to find elements by strategy:
[10:25:37] I/protractor - e.g., list(by.binding('')) gets all bindings.
[10:25:37] I/protractor -
***********************************************************
* WARNING: _debugger module not available on Node.js 8 *
* and higher. *
* *
* Use 'debugger' keyword instead: *
* https://goo.gl/MvWqFh *
***********************************************************
/Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/debuggerCommons.js:14
throw e;
^
Error: Cannot find module '_debugger'
Require stack:
- /Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/debuggerCommons.js
- /Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/clients/explorer.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:980:15)
at Function.Module._load (internal/modules/cjs/loader.js:862:27)
at Module.require (internal/modules/cjs/loader.js:1042:19)
at require (internal/modules/cjs/helpers.js:77:18)
at Object.<anonymous> (/Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/debuggerCommons.js:3:18)
at Module._compile (internal/modules/cjs/loader.js:1156:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1176:10)
at Module.load (internal/modules/cjs/loader.js:1000:32)
at Function.Module._load (internal/modules/cjs/loader.js:899:14)
at Module.require (internal/modules/cjs/loader.js:1042:19) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/debuggerCommons.js',
'/Users/alanagius/cli-repos/demo-several/node_modules/protractor/built/debugger/clients/explorer.js'
]
}
```
but in protractor version 7, this logic was removed.
BREAKING CHANGE:
Protractor builder elementExplorer option has been removed. This was not compatable with the Node.Js versions that the Angular CLI supports. See: https://github.com/angular/protractor/blob/master/docs/debugging.md#enabled-control-flow for an alternative debugging methods.
BREAKING CHANGE:
Removed deprecated `typescriptMismatch` warning option. Users will be migrated off this option automatically. Users wishing to disable TypeScript version checks should use the Angular compiler option `disableTypeScriptVersionCheck`, see https://angular.io/guide/angular-compiler-options#disabletypescriptversioncheck for more information.
With this change we update the target and module settings of various compilation units.
- We replace ES5 target in protractor. Protractor runs on Node.Js which support ES2018
- For applications we now use `ES2020` instead of `ESNext` as a module to avoid unexpected changes in behaviour
This changes also adds a migration to update existing projects and also removes `module` from the Universal tsconfig as per #17352 to enable lazy loading on the server.
With this change we enable stricter type checking and optimization effective coding rules when using the `--strict` option.
Changes in schematics
- `ng-new`: A prompt for the `--strict` option was added. This option is a proxy and will be passed to the application and workspace schematics.
- `application`: A `package.json` was added in the `app` folder, to tell the bundlers whether the application is free from side-effect code. When `strict` is `true`. the `sideEffects` will be set `false`.
- `workspace` When `strict` is true, we add stricter TypeScript and Angular type-checking options.
Note: AIO is already using these strict TypeScript compiler settings. PR to enable `strictTemplates` https://github.com/angular/angular/pull/36391
Reference: TOOL-1366
In tslint version 6, several recommanded rules have been removed in the following PRs:
https://github.com/palantir/tslint/pull/4871https://github.com/palantir/tslint/pull/4312
With this migration we update the tslint depedency to 6+ and add back these rules in the user workspace `tslint.json` also we remove some deprecated rules.
Until version 10, this is an opt-in migration and users will need to run this manually with the below command:
```
ng update @angular/cli --migrate-only tslint-version-6
```
Closes: #17117
Reference: TOOL-1348
