44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
import { VantComponent } from '../common/component';
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VantComponent({
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relation: {
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name: 'sidebar-item',
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type: 'descendant',
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linked(target) {
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this.children.push(target);
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this.setActive(this.data.activeKey);
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},
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unlinked(target) {
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this.children = this.children.filter((item) => item !== target);
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this.setActive(this.data.activeKey);
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}
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},
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props: {
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activeKey: {
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type: Number,
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value: 0,
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observer: 'setActive'
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}
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},
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beforeCreate() {
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this.children = [];
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this.currentActive = -1;
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},
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methods: {
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setActive(activeKey) {
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const { children, currentActive } = this;
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if (!children.length) {
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return Promise.resolve();
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}
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this.currentActive = activeKey;
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const stack = [];
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if (currentActive !== activeKey && children[currentActive]) {
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stack.push(children[currentActive].setActive(false));
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}
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if (children[activeKey]) {
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stack.push(children[activeKey].setActive(true));
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}
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return Promise.all(stack);
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}
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}
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});
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