<template> <DocSectionText v-bind="$attrs"> <p>Expansion state is controlled with <i>expandedKeys</i> property. The <i>expandedKeys</i> should be an object whose keys refer to the node key and values represent the expanded state e.g. <i>{'0-0': true}</i>.</p> </DocSectionText> <DeferredDemo @load="loadDemoData"> <div class="card"> <Button @click="toggleApplications" label="Toggle Applications" /> <TreeTable v-model:expandedKeys="expandedKeys" :value="nodes" class="mt-6" tableStyle="min-width: 50rem"> <Column field="name" header="Name" expander style="width: 34%"></Column> <Column field="size" header="Size" style="width: 33%"></Column> <Column field="type" header="Type" style="width: 33%"></Column> </TreeTable> </div> </DeferredDemo> <DocSectionCode :code="code" :service="['NodeService']" /> </template> <script> import { NodeService } from '@/service/NodeService'; export default { data() { return { nodes: null, expandedKeys: {}, code: { basic: ` <Button @click="toggleApplications" label="Toggle Applications" /> <TreeTable v-model:expandedKeys="expandedKeys" :value="nodes" class="mt-6" tableStyle="min-width: 50rem"> <Column field="name" header="Name" expander style="width: 34%"></Column> <Column field="size" header="Size" style="width: 33%"></Column> <Column field="type" header="Type" style="width: 33%"></Column> </TreeTable> `, options: ` <template> <div class="card"> <Button @click="toggleApplications" label="Toggle Applications" /> <TreeTable v-model:expandedKeys="expandedKeys" :value="nodes" class="mt-6" tableStyle="min-width: 50rem"> <Column field="name" header="Name" expander style="width: 34%"></Column> <Column field="size" header="Size" style="width: 33%"></Column> <Column field="type" header="Type" style="width: 33%"></Column> </TreeTable> </div> </template> <script> import { NodeService } from '@/service/NodeService'; export default { data() { return { nodes: null, expandedKeys: {} } }, mounted() { NodeService.getTreeTableNodes().then((data) => (this.nodes = data)); }, methods: { toggleApplications() { let _expandedKeys = { ...this.expandedKeys }; if (_expandedKeys['0']) delete _expandedKeys['0']; else _expandedKeys['0'] = true; this.expandedKeys = _expandedKeys; } } } <\/script> `, composition: ` <template> <div class="card"> <Button @click="toggleApplications" label="Toggle Applications" /> <TreeTable v-model:expandedKeys="expandedKeys" :value="nodes" class="mt-6" tableStyle="min-width: 50rem"> <Column field="name" header="Name" expander style="width: 34%"></Column> <Column field="size" header="Size" style="width: 33%"></Column> <Column field="type" header="Type" style="width: 33%"></Column> </TreeTable> </div> </template> <script setup> import { ref, onMounted } from 'vue'; import { NodeService } from '@/service/NodeService'; onMounted(() => { NodeService.getTreeTableNodes().then((data) => (nodes.value = data)); }); const nodes = ref(); const expandedKeys = ref({}); const toggleApplications = () => { let _expandedKeys = { ...expandedKeys.value }; if (_expandedKeys['0']) delete _expandedKeys['0']; else _expandedKeys['0'] = true; expandedKeys.value = _expandedKeys; } <\/script> `, data: ` { key: '0', label: 'Documents', data: 'Documents Folder', icon: 'pi pi-fw pi-inbox', children: [ { key: '0-0', label: 'Work', data: 'Work Folder', icon: 'pi pi-fw pi-cog', children: [ { key: '0-0-0', label: 'Expenses.doc', icon: 'pi pi-fw pi-file', data: 'Expenses Document' }, { key: '0-0-1', label: 'Resume.doc', icon: 'pi pi-fw pi-file', data: 'Resume Document' } ] }, { key: '0-1', label: 'Home', data: 'Home Folder', icon: 'pi pi-fw pi-home', children: [{ key: '0-1-0', label: 'Invoices.txt', icon: 'pi pi-fw pi-file', data: 'Invoices for this month' }] } ] }, ... ` } }; }, methods: { loadDemoData() { NodeService.getTreeTableNodes().then((data) => (this.nodes = data)); }, toggleApplications() { let _expandedKeys = { ...this.expandedKeys }; if (_expandedKeys['0']) delete _expandedKeys['0']; else _expandedKeys['0'] = true; this.expandedKeys = _expandedKeys; } } }; </script>