feat(core): allow more granular control over sanity checks

Allows consumers to disable individual sanity checks, rather than the all-or-nothing setup that we have at the moment.

Fixes #16617.

Author: crisbeto

src/material/core/common-behaviors/common-module.ts

@@ -18,16 +18,30 @@ import {VERSION as CDK_VERSION} from '@angular/cdk';
 const VERSION = new Version('0.0.0-PLACEHOLDER');
 
 /** @docs-private */
-export function MATERIAL_SANITY_CHECKS_FACTORY(): boolean {
+export function MATERIAL_SANITY_CHECKS_FACTORY(): SanityChecks {
   return true;
 }
 
 /** Injection token that configures whether the Material sanity checks are enabled. */
-export const MATERIAL_SANITY_CHECKS = new InjectionToken<boolean>('mat-sanity-checks', {
+export const MATERIAL_SANITY_CHECKS = new InjectionToken<SanityChecks>('mat-sanity-checks', {
   providedIn: 'root',
   factory: MATERIAL_SANITY_CHECKS_FACTORY,
 });
 
+/**
+ * Possible sanity checks that can be enabled. If set to
+ * true/false, all checks will be enabled/disabled.
+ */
+export type SanityChecks = boolean | GranularSanityChecks;
+
+/** Object that allows for the sanity checks to be configured granularly. */
+export interface GranularSanityChecks {
+  doctype: boolean;
+  theme: boolean;
+  version: boolean;
+  hammer: boolean;
+}
+
 /**
  * Module that captures anything that should be loaded and/or run for *all* Angular Material
  * components. This includes Bidi, etc.
@@ -51,11 +65,18 @@ export class MatCommonModule {
   /** Reference to the global 'window' object. */
   private _window = typeof window === 'object' && window ? window : null;
 
+  /** Configured sanity checks. */
+  private _sanityChecks: SanityChecks;
+
   constructor(
-    @Optional() @Inject(MATERIAL_SANITY_CHECKS) private _sanityChecksEnabled: boolean,
+    @Optional() @Inject(MATERIAL_SANITY_CHECKS) sanityChecks: any,
     @Optional() @Inject(HAMMER_LOADER) private _hammerLoader?: HammerLoader) {
 
-    if (this._areChecksEnabled() && !this._hasDoneGlobalChecks) {
+    // Note that `_sanityChecks` is typed to `any`, because AoT
+    // throws an error if we use the `SanityChecks` type directly.
+    this._sanityChecks = sanityChecks;
+
+    if (!this._hasDoneGlobalChecks) {
       this._checkDoctypeIsDefined();
       this._checkThemeIsPresent();
       this._checkCdkVersionMatch();
@@ -64,8 +85,13 @@ export class MatCommonModule {
   }
 
   /** Whether any sanity checks are enabled */
-  private _areChecksEnabled(): boolean {
-    return this._sanityChecksEnabled && isDevMode() && !this._isTestEnv();
+  private _isCheckEnabled(check: keyof GranularSanityChecks): boolean {
+    if (!isDevMode() || this._isTestEnv()) {
+      // All checks are disabled in production mode and in test environments.
+      return false;
+    }
+
+    return typeof this._sanityChecks === 'boolean' ? this._sanityChecks : this._sanityChecks[check];
   }
 
   /** Whether the code is running in tests. */
@@ -75,7 +101,7 @@ export class MatCommonModule {
   }
 
   private _checkDoctypeIsDefined(): void {
-    if (this._document && !this._document.doctype) {
+    if (this._isCheckEnabled('doctype') && this._document && !this._document.doctype) {
       console.warn(
         'Current document does not have a doctype. This may cause ' +
         'some Angular Material components not to behave as expected.'
@@ -86,7 +112,8 @@ export class MatCommonModule {
   private _checkThemeIsPresent(): void {
     // We need to assert that the `body` is defined, because these checks run very early
     // and the `body` won't be defined if the consumer put their scripts in the `head`.
-    if (!this._document || !this._document.body || typeof getComputedStyle !== 'function') {
+    if (!this._isCheckEnabled('theme') || !this._document || !this._document.body ||
+        typeof getComputedStyle !== 'function') {
       return;
     }
 
@@ -113,7 +140,7 @@ export class MatCommonModule {
 
   /** Checks whether the material version matches the cdk version */
   private _checkCdkVersionMatch(): void {
-    if (VERSION.full !== CDK_VERSION.full) {
+    if (this._isCheckEnabled('version') && VERSION.full !== CDK_VERSION.full) {
       console.warn(
           'The Angular Material version (' + VERSION.full + ') does not match ' +
           'the Angular CDK version (' + CDK_VERSION.full + ').\n' +
@@ -128,7 +155,7 @@ export class MatCommonModule {
       return;
     }
 
-    if (this._areChecksEnabled() && !(this._window as any)['Hammer'] && !this._hammerLoader) {
+    if (this._isCheckEnabled('hammer') && !(this._window as any)['Hammer'] && !this._hammerLoader) {
       console.warn(
         'Could not find HammerJS. Certain Angular Material components may not work correctly.');
     }

src/material/core/common-behaviors/index.ts

@@ -6,7 +6,12 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-export {MatCommonModule, MATERIAL_SANITY_CHECKS} from './common-module';
+export {
+  MatCommonModule,
+  MATERIAL_SANITY_CHECKS,
+  SanityChecks,
+  GranularSanityChecks,
+} from './common-module';
 export {CanDisable, CanDisableCtor, mixinDisabled} from './disabled';
 export {CanColor, CanColorCtor, mixinColor, ThemePalette} from './color';
 export {CanDisableRipple, CanDisableRippleCtor, mixinDisableRipple} from './disable-ripple';

tools/public_api_guard/material/core.d.ts

@@ -100,6 +100,13 @@ export declare class GestureConfig extends HammerGestureConfig {
     buildHammer(element: HTMLElement): HammerInstance;
 }
 
+export interface GranularSanityChecks {
+    doctype: boolean;
+    hammer: boolean;
+    theme: boolean;
+    version: boolean;
+}
+
 export interface HammerInput {
     center: {
         x: number;
@@ -190,7 +197,7 @@ export declare const MAT_OPTION_PARENT_COMPONENT: InjectionToken<MatOptionParent
 export declare const MAT_RIPPLE_GLOBAL_OPTIONS: InjectionToken<RippleGlobalOptions>;
 
 export declare class MatCommonModule {
-    constructor(_sanityChecksEnabled: boolean, _hammerLoader?: HammerLoader | undefined);
+    constructor(sanityChecks: any, _hammerLoader?: HammerLoader | undefined);
     _checkHammerIsAvailable(): void;
 }
 
@@ -206,7 +213,7 @@ export declare type MatDateFormats = {
     };
 };
 
-export declare const MATERIAL_SANITY_CHECKS: InjectionToken<boolean>;
+export declare const MATERIAL_SANITY_CHECKS: InjectionToken<SanityChecks>;
 
 export declare class MatLine {
 }
@@ -412,6 +419,8 @@ export interface RippleTarget {
     rippleDisabled: boolean;
 }
 
+export declare type SanityChecks = boolean | GranularSanityChecks;
+
 export declare const JAN = 0, FEB = 1, MAR = 2, APR = 3, MAY = 4, JUN = 5, JUL = 6, AUG = 7, SEP = 8, OCT = 9, NOV = 10, DEC = 11;
 
 export declare function setLines(lines: QueryList<MatLine>, element: ElementRef<HTMLElement>): void;