93 lines
2.2 KiB
JavaScript
93 lines
2.2 KiB
JavaScript
import { computed, watch } from 'vue';
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import { createNamespace, pick } from '../utils';
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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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import Checker, { checkerProps } from './Checker';
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const [createComponent, bem] = createNamespace('checkbox');
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export const CHECKBOX_KEY = 'vanCheckbox';
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export default createComponent({
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props: {
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...checkerProps,
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bindGroup: {
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type: Boolean,
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default: true,
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},
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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(CHECKBOX_KEY);
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const setParentValue = (checked) => {
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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.indexOf(name) === -1) {
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value.push(name);
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if (props.bindGroup) {
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parent.emit('update:modelValue', 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.emit('update:modelValue', 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) => {
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emit('change', value);
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}
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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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bindGroup={props.bindGroup}
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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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