<template> <DocSectionText v-bind="$attrs"> <p>Column visibility based on a condition can be implemented with dynamic columns, in this sample a MultiSelect is used to manage the visible columns.</p> </DocSectionText> <DeferredDemo @load="loadDemoData"> <div class="card"> <TreeTable :value="nodes"> <template #header> <div style="text-align: left"> <MultiSelect :modelValue="selectedColumns" @update:modelValue="onToggle" :options="columns" optionLabel="header" class="w-full sm:w-16rem" display="chip" /> </div> </template> <Column field="name" header="Name" :expander="true"></Column> <Column v-for="col of selectedColumns" :key="col.field" :field="col.field" :header="col.header"></Column> </TreeTable> </div> </DeferredDemo> <DocSectionCode :code="code" :service="['NodeService']" /> </template> <script> import { NodeService } from '@/service/NodeService'; export default { data() { return { nodes: null, selectedColumns: null, columns: null, code: { basic: ` <TreeTable :value="nodes"> <template #header> <div style="text-align:left"> <MultiSelect :modelValue="selectedColumns" @update:modelValue="onToggle" :options="columns" optionLabel="header" class="w-full sm:w-16rem" display="chip"/> </div> </template> <Column field="name" header="Name" :expander="true"></Column> <Column v-for="col of selectedColumns" :field="col.field" :header="col.header" :key="col.field"></Column> </TreeTable> `, options: ` <template> <div class="card"> <TreeTable :value="nodes"> <template #header> <div style="text-align:left"> <MultiSelect :modelValue="selectedColumns" @update:modelValue="onToggle" :options="columns" optionLabel="header" class="w-full sm:w-16rem" display="chip"/> </div> </template> <Column field="name" header="Name" :expander="true"></Column> <Column v-for="col of selectedColumns" :field="col.field" :header="col.header" :key="col.field"></Column> </TreeTable> </div> </template> <script> import { NodeService } from '@/service/NodeService'; export default { data() { return { nodes: null, selectedColumns: null, columns: null, } }, created() { this.columns = [ { field: 'size', header: 'Size' }, { field: 'type', header: 'Type' } ]; this.selectedColumns = this.columns; }, mounted() { NodeService.getTreeTableNodes().then((data) => (this.nodes = data)); }, methods: { onToggle(value) { this.selectedColumns = this.columns.filter(col => value.includes(col)); } } } <\/script> `, composition: ` <template> <div class="card"> <TreeTable :value="nodes"> <template #header> <div style="text-align:left"> <MultiSelect :modelValue="selectedColumns" @update:modelValue="onToggle" :options="columns" optionLabel="header" class="w-full sm:w-16rem" display="chip"/> </div> </template> <Column field="name" header="Name" :expander="true"></Column> <Column v-for="col of selectedColumns" :field="col.field" :header="col.header" :key="col.field"></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 columns = ref([ {field: 'size', header: 'Size'}, {field: 'type', header: 'Type'} ]); const nodes = ref(); const selectedColumns = ref(columns.value); const onToggle = (val) => { selectedColumns.value = columns.value.filter(col => val.includes(col)); }; <\/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' }] } ] }, ... ` } }; }, created() { this.columns = [ { field: 'size', header: 'Size' }, { field: 'type', header: 'Type' } ]; this.selectedColumns = this.columns; }, methods: { loadDemoData() { NodeService.getTreeTableNodes().then((data) => (this.nodes = data)); }, onToggle(value) { this.selectedColumns = this.columns.filter((col) => value.includes(col)); } } }; </script>