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<style>
:host {
-webkit-tap-highlight-color: transparent;
align-items: center;
cursor: pointer;
display: flex;
outline: none;
user-select: none;
/* Sizes. */
--cr-checkbox-border-size: 2px;
--cr-checkbox-size: 16px;
--cr-checkbox-ripple-size: 40px;
/* Derived sizes (offsets). */
--cr-checkbox-ripple-offset: calc(var(--cr-checkbox-size)/2 -
var(--cr-checkbox-ripple-size)/2 - var(--cr-checkbox-border-size));
/* --cr-checked-color automatically flips for light/dark mode. */
--cr-checkbox-checked-box-color: var(--cr-checked-color);
--cr-checkbox-ripple-checked-color: var(--cr-checked-color);
/* Light mode colors. */
--cr-checkbox-checked-ripple-opacity: .2;
--cr-checkbox-mark-color: white;
--cr-checkbox-ripple-unchecked-color: var(--google-grey-900);
--cr-checkbox-unchecked-box-color: var(--google-grey-700);
--cr-checkbox-unchecked-ripple-opacity: .15;
}
@media (prefers-color-scheme: dark) {
:host {
/* Dark mode colors. */
--cr-checkbox-checked-ripple-opacity: .4;
--cr-checkbox-mark-color: var(--google-grey-900);
--cr-checkbox-ripple-unchecked-color: var(--google-grey-500);
--cr-checkbox-unchecked-box-color: var(--google-grey-500);
--cr-checkbox-unchecked-ripple-opacity: .4;
}
}
:host([disabled]) {
cursor: initial;
opacity: var(--cr-disabled-opacity);
pointer-events: none;
}
#checkbox {
background: none;
border: var(--cr-checkbox-border-size) solid
var(--cr-checkbox-unchecked-box-color);
border-radius: 2px;
box-sizing: border-box;
cursor: pointer;
display: block;
flex-shrink: 0;
height: var(--cr-checkbox-size);
margin: 0;
outline: none;
padding: 0;
position: relative;
transform: none; /* Checkboxes shouldn't flip even in RTL. */
width: var(--cr-checkbox-size);
}
@media (forced-colors: active) {
/* paper-ripple is not showing in Windows HCM. Use outline instead. */
:host(:focus) #checkbox {
outline: var(--cr-focus-outline-hcm);
}
}
#checkmark {
border-color: var(--cr-checkbox-mark-color);
border-style: solid;
border-width: 0 2px 2px 0;
content: '';
display: block;
height: 73%;
transform: scale(0) rotate(45deg);
transform-origin: 100% 80%;
width: 36%;
}
:host-context([dir='rtl']) #checkmark {
transform-origin: 50% 14%;
}
:host([checked]) #checkbox {
background: var(--cr-checkbox-checked-box-background-color,
var(--cr-checkbox-checked-box-color));
border-color: var(--cr-checkbox-checked-box-color);
}
:host([checked]) #checkmark {
transform: scale(1) rotate(45deg);
/* Only animate when showing checkmark. */
transition: transform 140ms ease-out;
}
paper-ripple {
--paper-ripple-opacity: var(--cr-checkbox-ripple-opacity,
var(--cr-checkbox-unchecked-ripple-opacity));
color: var(--cr-checkbox-ripple-unchecked-color);
height: var(--cr-checkbox-ripple-size);
left: var(--cr-checkbox-ripple-offset);
outline: var(--cr-checkbox-ripple-ring, none);
pointer-events: none;
top: var(--cr-checkbox-ripple-offset);
transition: color linear 80ms;
width: var(--cr-checkbox-ripple-size);
}
:host([checked]) paper-ripple {
--paper-ripple-opacity: var(--cr-checkbox-ripple-opacity,
var(--cr-checkbox-checked-ripple-opacity));
color: var(--cr-checkbox-ripple-checked-color);
}
:host-context([dir=rtl]) paper-ripple {
left: auto;
right: var(--cr-checkbox-ripple-offset);
}
#label-container {
color: var(--cr-checkbox-label-color, var(--cr-primary-text-color));
padding-inline-start: var(--cr-checkbox-label-padding-start, 20px);
white-space: normal;
}
:host(.no-label) #label-container {
display: none;
}
/* Hidden from UI, but not screen readers. */
#ariaDescription {
height: 0;
overflow: hidden;
width: 0;
}
</style>
<div id="checkbox" tabindex$="[[tabIndex]]" role="checkbox"
on-keydown="onKeyDown_" on-keyup="onKeyUp_" aria-disabled="false"
aria-checked="false" aria-labelledby="label-container"
aria-describedby="ariaDescription">
<span id="checkmark"></span>
</div>
<div id="label-container" aria-hidden="true" part="label-container">
<slot></slot>
</div>
<div id="ariaDescription" aria-hidden="true">[[ariaDescription]]</div>
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