Ionic/core/src/components/button/button.scss

@import "./button.vars";

// Button
// --------------------------------------------------

:host {
  /**
   * @prop --background: Background of the button
   * @prop --background-activated: Background of the button when pressed. Note: setting this will interfere with the Material Design ripple.
   * @prop --background-activated-opacity: Opacity of the button when pressed
   * @prop --background-focused: Background of the button when focused with the tab key
   * @prop --background-focused-opacity: Opacity of the button when focused with the tab key
   * @prop --background-hover: Background of the button on hover
   * @prop --background-hover-opacity: Opacity of the background on hover
   *
   * @prop --color: Text color of the button
   * @prop --color-activated: Text color of the button when pressed
   * @prop --color-focused: Text color of the button when focused with the tab key
   * @prop --color-hover: Text color of the button when hover
   *
   * @prop --transition: Transition of the button
   *
   * @prop --border-radius: Border radius of the button
   * @prop --border-width: Border width of the button
   * @prop --border-style: Border style of the button
   * @prop --border-color: Border color of the button
   *
   * @prop --ripple-color: Color of the button ripple effect
   *
   * @prop --box-shadow: Box shadow of the button
   * @prop --opacity: Opacity of the button
   *
   * @prop --padding-top: Top padding of the button
   * @prop --padding-end: Right padding if direction is left-to-right, and left padding if direction is right-to-left of the button
   * @prop --padding-bottom: Bottom padding of the button
   * @prop --padding-start: Left padding if direction is left-to-right, and right padding if direction is right-to-left of the button
   */
  --overflow: hidden;
  --ripple-color: currentColor;
  --border-width: initial;
  --border-color: initial;
  --border-style: initial;
  --color-activated: var(--color);
  --color-focused: var(--color);
  --color-hover: var(--color);
  --box-shadow: none;

  display: inline-block;

  width: auto;

  color: var(--color);

  font-family: $font-family-base;

  text-align: center;
  text-decoration: none;
  text-overflow: ellipsis;

  white-space: nowrap;

  user-select: none;
  vertical-align: top; // the better option for most scenarios
  vertical-align: -webkit-baseline-middle; // the best for those that support it
  pointer-events: auto;

  font-kerning: none;
}

:host(.button-disabled) {
  cursor: default;
  opacity: .5;
  pointer-events: none;
}

// Solid Button
// --------------------------------------------------

// Default Solid Color
:host(.button-solid) {
  --background: #{ion-color(primary, base)};
  --color: #{ion-color(primary, contrast)};
}


// Outline Button
// --------------------------------------------------

// Default Outline Color
:host(.button-outline) {
  --border-color: #{ion-color(primary, base)};
  --background: transparent;
  --color: #{ion-color(primary, base)};
}


// Clear Button
// --------------------------------------------------

// Default Clear Color
:host(.button-clear) {
  --border-width: 0;
  --background: transparent;
  --color: #{ion-color(primary, base)};
}


// Block Button
// --------------------------------------------------

:host(.button-block) {
  display: block;
}

:host(.button-block) .button-native {
  @include margin-horizontal(0);

  display: block;

  width: 100%;

  clear: both;

  contain: content;
}

:host(.button-block) .button-native::after {
  clear: both;
}


// Full Button
// --------------------------------------------------

:host(.button-full) {
  display: block;
}

:host(.button-full) .button-native {
  @include margin-horizontal(0);

  display: block;

  width: 100%;

  contain: content;
}

:host(.button-full:not(.button-round)) .button-native {
  @include border-radius(0);

  border-right-width: 0;
  border-left-width: 0;
}

.button-native {
  @include border-radius(var(--border-radius));
  @include font-smoothing();
  @include margin(0);
  @include padding(var(--padding-top), var(--padding-end), var(--padding-bottom), var(--padding-start));
  @include text-inherit();

  display: block;
  position: relative;

  width: 100%;
  height: 100%;

  transition: var(--transition);

  border-width: var(--border-width);
  border-style: var(--border-style);
  border-color: var(--border-color);

  outline: none;

  background: var(--background);

  line-height: 1;

  box-shadow: var(--box-shadow);
  contain: layout style;
  cursor: pointer;
  opacity: var(--opacity);
  overflow: var(--overflow);

  overflow: hidden;

  z-index: 0;
  box-sizing: border-box;
  appearance: none;
}

.button-native::-moz-focus-inner {
  border: 0;
}

.button-inner {
  display: flex;
  position: relative;

  flex-flow: row nowrap;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;

  width: 100%;
  height: 100%;

  z-index: 1;
}


// Button Icons
// --------------------------------------------------

::slotted(ion-icon) {
  font-size: 1.4em;
  pointer-events: none;
}

::slotted(ion-icon[slot="start"]) {
  @include margin(0, .3em, 0, -.3em);
}

::slotted(ion-icon[slot="end"]) {
  @include margin(0, -.2em, 0, .3em);
}

::slotted(ion-icon[slot="icon-only"]) {
  font-size: 1.8em;
}


// Button Ripple effect
// --------------------------------------------------

ion-ripple-effect {
  color: var(--ripple-color);
}


// Button: States
// --------------------------------------------------

.button-native::after {
  @include button-state();
}

// Button Activated
:host(.ion-activated) {
  color: var(--color-activated);
}

:host(.ion-activated) .button-native::after {
  background: var(--background-activated);

  opacity: var(--background-activated-opacity);
}

// Button Focused
:host(.ion-focused) {
  color: var(--color-focused);
}

:host(.ion-focused) .button-native::after {
  background: var(--background-focused);

  opacity: var(--background-focused-opacity);
}

// Button Hover
@media (any-hover: hover) {
  :host(:hover) {
    color: var(--color-hover);
  }

  :host(:hover) .button-native::after {
    background: var(--background-hover);

    opacity: var(--background-hover-opacity);
  }
}


// Button Colors
// --------------------------------------------------

// Solid Button with Color
:host(.button-solid.ion-color) .button-native {
  background: current-color(base);
  color: current-color(contrast);
}

// Outline Button with Color
:host(.button-outline.ion-color) .button-native {
  border-color: current-color(base);

  background: transparent;
  color: current-color(base);
}

// Clear Button with Color
:host(.button-clear.ion-color) .button-native {
  background: transparent;
  color: current-color(base);
}