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checkbox.vue
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checkbox.vue
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<template>
<label
class="checkbox"
:class="[{ disabled, indeterminate, 'indeterminate-fix': indeterminateTransitionFix }, radio ? '-radio' : '-checkbox']"
>
<span
v-if="!!$slots.before"
class="label -before"
:class="{ faint: disabled }"
>
<slot name="before" />
</span>
<input
type="checkbox"
class="visible-for-screenreader-only"
:disabled="disabled"
:checked="modelValue"
:indeterminate="indeterminate"
@change="$emit('update:modelValue', $event.target.checked)"
>
<i
class="input checkbox-indicator"
:aria-hidden="true"
:class="[{ disabled }, radio ? '-radio' : '-checkbox']"
@transitionend.capture="onTransitionEnd"
/>
<span
v-if="!!$slots.default"
class="label -after"
:class="{ faint: disabled }"
>
<slot />
</span>
</label>
</template>
<script>
export default {
props: [
'radio',
'modelValue',
'indeterminate',
'disabled'
],
emits: ['update:modelValue'],
data: (vm) => ({
indeterminateTransitionFix: vm.indeterminate
}),
watch: {
indeterminate (e) {
if (e) {
this.indeterminateTransitionFix = true
}
}
},
methods: {
onTransitionEnd () {
if (!this.indeterminate) {
this.indeterminateTransitionFix = false
}
}
}
}
</script>
<style lang="scss">
.checkbox {
position: relative;
display: inline-block;
min-height: 1.2em;
&-indicator,
& .label {
vertical-align: middle;
}
& > &-indicator {
/* Reset .input stuff */
padding: 0;
margin: 0;
position: relative;
line-height: inherit;
display: inline-block;
width: 1.2em;
height: 1.2em;
box-shadow: none;
--_shadow: var(--shadow);
}
&-indicator::before {
position: absolute;
inset: 0;
display: block;
content: "✓";
transition: color 200ms;
width: 1.1em;
height: 1.1em;
border-radius: var(--roundness);
box-shadow: var(--_shadow);
background-color: var(--background);
vertical-align: top;
text-align: center;
line-height: 1.1em;
font-size: 1.1em;
color: transparent;
overflow: hidden;
box-sizing: border-box;
}
&.-radio {
.checkbox-indicator {
&,
&::before {
border-radius: 9999px;
}
&::before {
content: "•";
}
}
}
.disabled {
.checkbox-indicator::before {
background-color: var(--background);
}
}
input[type="checkbox"] {
&:checked + .checkbox-indicator::before {
color: var(--text);
}
&:indeterminate + .checkbox-indicator::before {
content: "–";
color: var(--text);
}
}
&.indeterminate-fix {
input[type="checkbox"] + .checkbox-indicator::before {
content: "–";
}
}
& > .label {
&.-after {
margin-left: 0.5em;
}
&.-before {
margin-right: 0.5em;
}
}
}
</style>

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