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96 lines
2.2 KiB
TypeScript
96 lines
2.2 KiB
TypeScript
import { computed, watch, defineComponent } from 'vue';
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// Utils
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import { createNamespace, extend, pick, truthProp } from '../utils';
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import {
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CHECKBOX_GROUP_KEY,
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CheckboxGroupProvide,
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} from '../checkbox-group/CheckboxGroup';
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// Composables
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import { useParent } from '@vant/use';
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import { useExpose } from '../composables/use-expose';
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import { useLinkField } from '../composables/use-link-field';
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// Components
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import Checker, { checkerProps } from './Checker';
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const [name, bem] = createNamespace('checkbox');
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export default defineComponent({
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name,
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props: extend({}, checkerProps, {
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bindGroup: truthProp,
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}),
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emits: ['change', 'update:modelValue'],
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setup(props, { emit, slots }) {
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const { parent } = useParent<CheckboxGroupProvide>(CHECKBOX_GROUP_KEY);
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const setParentValue = (checked: boolean) => {
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const { name } = props;
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const { max, modelValue } = parent!.props;
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const value = modelValue.slice();
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if (checked) {
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const overlimit = max && value.length >= max;
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if (!overlimit && !value.includes(name)) {
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value.push(name);
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if (props.bindGroup) {
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parent!.updateValue(value);
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}
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}
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} else {
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const index = value.indexOf(name);
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if (index !== -1) {
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value.splice(index, 1);
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if (props.bindGroup) {
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parent!.updateValue(value);
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}
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}
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}
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};
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const checked = computed(() => {
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if (parent && props.bindGroup) {
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return parent.props.modelValue.indexOf(props.name) !== -1;
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}
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return !!props.modelValue;
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});
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const toggle = (newValue = !checked.value) => {
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if (parent && props.bindGroup) {
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setParentValue(newValue);
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} else {
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emit('update:modelValue', newValue);
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}
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};
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watch(
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() => props.modelValue,
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(value) => emit('change', value)
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);
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useExpose({ toggle, props, checked });
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useLinkField(() => props.modelValue);
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return () => (
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<Checker
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v-slots={pick(slots, ['default', 'icon'])}
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bem={bem}
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role="checkbox"
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parent={parent}
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checked={checked.value}
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onToggle={toggle}
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{...props}
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/>
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);
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},
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});
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