fix: blurry ripples for slide-toggle, radio, checkbox in MS edge.

src/lib/checkbox/checkbox.html

@@ -18,7 +18,10 @@
     <div matRipple class="mat-checkbox-ripple"
          [matRippleTrigger]="label"
          [matRippleDisabled]="_isRippleDisabled()"
-         [matRippleCentered]="true"></div>
+         [matRippleRadius]="_rippleConfig.radius"
+         [matRippleSpeedFactor]="_rippleConfig.speedFactor"
+         [matRippleCentered]="_rippleConfig.centered">
+    </div>
     <div class="mat-checkbox-frame"></div>
     <div class="mat-checkbox-background">
       <svg version="1.1"

src/lib/checkbox/checkbox.scss

@@ -9,7 +9,7 @@ $_mat-checkbox-mark-path-length: 22.910259;
 $_mat-checkbox-indeterminate-checked-easing-function: cubic-bezier(0.14, 0, 0, 1);
 
 // The ripple size of the checkbox
-$_mat-checkbox-ripple-size: 15px;
+$_mat-checkbox-ripple-radius: 25px;
 
 // The amount of spacing between the checkbox and its label.
 $_mat-checkbox-item-spacing: $mat-toggle-padding;
@@ -413,11 +413,10 @@ $_mat-checkbox-mark-stroke-size: 2 / 15 * $mat-checkbox-size !default;
 
 .mat-checkbox-ripple {
   position: absolute;
-  left: -$_mat-checkbox-ripple-size;
-  top: -$_mat-checkbox-ripple-size;
-  right: -$_mat-checkbox-ripple-size;
-  bottom: -$_mat-checkbox-ripple-size;
-  border-radius: 50%;
+  left: $mat-checkbox-size / 2 - $_mat-checkbox-ripple-radius;
+  top: $mat-checkbox-size / 2 - $_mat-checkbox-ripple-radius;
+  height: $_mat-checkbox-ripple-radius * 2;
+  width: $_mat_checkbox-ripple-radius * 2;
   z-index: 1;
   pointer-events: none;
 }

src/lib/checkbox/checkbox.ts

@@ -35,6 +35,7 @@ import {
   mixinDisabled,
   mixinDisableRipple,
   mixinTabIndex,
+  RippleConfig,
   RippleRef,
 } from '@angular/material/core';
 
@@ -178,6 +179,9 @@ export class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAc
   /** Called when the checkbox is blurred. Needed to properly implement ControlValueAccessor. */
   @ViewChild(MatRipple) _ripple: MatRipple;
 
+  /** Ripple configuration for the mouse ripples and focus indicators. */
+  _rippleConfig: RippleConfig = {centered: true, radius: 25, speedFactor: 1.5};
+
   /**
    * Called when the checkbox is blurred. Needed to properly implement ControlValueAccessor.
    * @docs-private
@@ -336,7 +340,7 @@ export class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAc
   /** Function is called whenever the focus changes for the input element. */
   private _onInputFocusChange(focusOrigin: FocusOrigin) {
     if (!this._focusRipple && focusOrigin === 'keyboard') {
-      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, centered: true});
+      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, ...this._rippleConfig});
     } else if (!focusOrigin) {
       this._removeFocusRipple();
       this.onTouched();

src/lib/radio/radio.html

@@ -8,7 +8,10 @@
     <div mat-ripple class="mat-radio-ripple"
          [matRippleTrigger]="label"
          [matRippleDisabled]="_isRippleDisabled()"
-         [matRippleCentered]="true"></div>
+         [matRippleCentered]="_rippleConfig.centered"
+         [matRippleRadius]="_rippleConfig.radius"
+         [matRippleSpeedFactor]="_rippleConfig.speedFactor">
+    </div>
   </div>
 
   <input #input class="mat-radio-input cdk-visually-hidden" type="radio"

src/lib/radio/radio.scss

@@ -3,7 +3,7 @@
 
 
 $mat-radio-size: $mat-toggle-size !default;
-$mat-radio-ripple-size: $mat-radio-size * 0.75;
+$mat-radio-ripple-radius: 25px;
 
 // Top-level host container.
 .mat-radio-button {
@@ -101,11 +101,10 @@ $mat-radio-ripple-size: $mat-radio-size * 0.75;
 
 .mat-radio-ripple {
   position: absolute;
-  left: -$mat-radio-ripple-size;
-  top: -$mat-radio-ripple-size;
-  right: -$mat-radio-ripple-size;
-  bottom: -$mat-radio-ripple-size;
-  border-radius: 50%;
+  left: $mat-radio-size / 2 - $mat-radio-ripple-radius;
+  top: $mat-radio-size / 2 - $mat-radio-ripple-radius;
+  height: $mat-radio-ripple-radius * 2;
+  width: $mat-radio-ripple-radius * 2;
   z-index: 1;
   pointer-events: none;
 }

src/lib/radio/radio.ts

@@ -39,6 +39,7 @@ import {
   mixinColor,
   mixinDisabled,
   mixinDisableRipple,
+  RippleConfig,
   RippleRef,
 } from '@angular/material/core';
 
@@ -483,6 +484,9 @@ export class MatRadioButton extends _MatRadioButtonMixinBase
   /** The child ripple instance. */
   @ViewChild(MatRipple) _ripple: MatRipple;
 
+  /** Ripple configuration for the mouse ripples and focus indicators. */
+  _rippleConfig: RippleConfig = {centered: true, radius: 23, speedFactor: 1.5};
+
   /** Reference to the current focus ripple. */
   private _focusRipple: RippleRef | null;
 
@@ -596,7 +600,7 @@ export class MatRadioButton extends _MatRadioButtonMixinBase
   /** Function is called whenever the focus changes for the input element. */
   private _onInputFocusChange(focusOrigin: FocusOrigin) {
     if (!this._focusRipple && focusOrigin === 'keyboard') {
-      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, centered: true});
+      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, ...this._rippleConfig});
     } else if (!focusOrigin) {
       if (this.radioGroup) {
         this.radioGroup._touch();

src/lib/slide-toggle/slide-toggle.html

@@ -24,8 +24,10 @@
 
       <div class="mat-slide-toggle-ripple" mat-ripple
            [matRippleTrigger]="label"
-           [matRippleCentered]="true"
-           [matRippleDisabled]="disableRipple || disabled">
+           [matRippleDisabled]="disableRipple || disabled"
+           [matRippleCentered]="_rippleConfig.centered"
+           [matRippleRadius]="_rippleConfig.radius"
+           [matRippleSpeedFactor]="_rippleConfig.speedFactor">
       </div>
 
     </div>

src/lib/slide-toggle/slide-toggle.scss

@@ -160,7 +160,6 @@ $mat-slide-toggle-bar-track-width: $mat-slide-toggle-bar-width - $mat-slide-togg
   left: $mat-slide-toggle-thumb-size / 2 - $mat-slide-toggle-ripple-radius;
   height: $mat-slide-toggle-ripple-radius * 2;
   width: $mat-slide-toggle-ripple-radius * 2;
-  border-radius: 50%;
   z-index: 1;
   pointer-events: none;
 }

src/lib/slide-toggle/slide-toggle.ts

@@ -38,6 +38,7 @@ import {
   mixinDisabled,
   mixinDisableRipple,
   mixinTabIndex,
+  RippleConfig,
   RippleRef,
 } from '@angular/material/core';
 
@@ -139,6 +140,9 @@ export class MatSlideToggle extends _MatSlideToggleMixinBase implements OnDestro
   /** Reference to the ripple directive on the thumb container. */
   @ViewChild(MatRipple) _ripple: MatRipple;
 
+  /** Ripple configuration for the mouse ripples and focus indicators. */
+  _rippleConfig: RippleConfig = {centered: true, radius: 23, speedFactor: 1.5};
+
   constructor(elementRef: ElementRef,
               renderer: Renderer2,
               private _platform: Platform,
@@ -232,7 +236,7 @@ export class MatSlideToggle extends _MatSlideToggleMixinBase implements OnDestro
   private _onInputFocusChange(focusOrigin: FocusOrigin) {
     if (!this._focusRipple && focusOrigin === 'keyboard') {
       // For keyboard focus show a persistent ripple as focus indicator.
-      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, centered: true});
+      this._focusRipple = this._ripple.launch(0, 0, {persistent: true, ...this._rippleConfig});
     } else if (!focusOrigin) {
       this.onTouched();