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perf(QTree): QTree opt-in property to enable virtual scrolling (fix #17941) #18174

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perf(QTree): QTree opt-in property to enable virtual scrolling (fix #17941) #18174

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6a8690a
perf(ui): rewriting the inner strategies of q-tree to use hashes inst…
Nov 18, 2025
dc4a539
perf(ui): add initial support for virtual scrolling the q-tree
gilmar-sales Jan 9, 2026
cd454ee
fix(q-tree): fixing q-tree virtual scrolling with undesired space bet…
gilmar-sales Jan 10, 2026
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6 changes: 5 additions & 1 deletion ui/playground/src/pages/components/tree.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
<q-toggle v-model="selectableNodes" label="Selectable nodes" />
<q-toggle v-model="noSelectionUnset" label="noSelectionUnset" />
<q-toggle v-model="noConnectors" label="No connectors" />
<q-toggle v-model="virtualScroll" label="Virtual Scroll" />
</div>
<div class="col-xs-12 col-md-4">
<q-input v-model="filter" label="Filter" />
Expand All @@ -36,7 +37,7 @@
<q-btn @click="getNodeByKey" no-caps label="getNodeByKey test" />
<q-toggle v-model="isBigTree" label="Load Big Tree"/>
<q-toggle v-model="noTransition" label="noTransition"/>
<q-btn @click="expandAll" no-caps label="Expand all" />
<q-btn @click="expandAll" no-caps :ripple="false" label="Expand all" />
<q-btn @click="collapseAll" no-caps label="Collapse all" />
</div>
</div>
Expand All @@ -45,13 +46,15 @@
<div class="q-mt-lg q-pa-lg" :class="{'bg-black': dark}">
<q-tree
ref="tree"
style="height: 500px;"
:nodes="nodes"
node-key="key"
children-key="subnodes"
v-model:selected="selected"
:tick-strategy="tickStrategy"
v-model:ticked="ticked"
v-model:expanded="expanded"
:virtual-scroll="virtualScroll"
:dark="dark"
:dense="dense"
:accordion="accordion"
Expand Down Expand Up @@ -150,6 +153,7 @@ export default {
findNode('KEY: Node 1.3 - tap on me!', smallTree).handler = () => this.$q.notify('Tapped on node 1.3')

return {
virtualScroll: true,
noConnectors: false,
noTransition: false,
selected: null,
Expand Down
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