carbon-components-svelte/docs/src/pages/framed/TreeView/TreeViewExpandAll.svelte

<script>
  import { TreeView, Button } from "carbon-components-svelte";

  let treeview = null;
  let children = [
    { id: 0, text: "AI / Machine learning" },
    {
      id: 1,
      text: "Analytics",
      children: [
        {
          id: 2,
          text: "IBM Analytics Engine",
          children: [
            { id: 3, text: "Apache Spark" },
            { id: 4, text: "Hadoop" },
          ],
        },
        { id: 5, text: "IBM Cloud SQL Query" },
        { id: 6, text: "IBM Db2 Warehouse on Cloud" },
      ],
    },
    {
      id: 7,
      text: "Blockchain",
      children: [{ id: 8, text: "IBM Blockchain Platform" }],
    },
    {
      id: 9,
      text: "Databases",
      children: [
        { id: 10, text: "IBM Cloud Databases for Elasticsearch" },
        { id: 11, text: "IBM Cloud Databases for Enterprise DB" },
        { id: 12, text: "IBM Cloud Databases for MongoDB" },
        { id: 13, text: "IBM Cloud Databases for PostgreSQL" },
      ],
    },
    {
      id: 14,
      text: "Integration",
      disabled: true,
      children: [{ id: 15, text: "IBM API Connect", disabled: true }],
    },
  ];
</script>

<div>
  <Button on:click="{treeview?.expandAll}">Expand all</Button>
</div>

<TreeView
  bind:this="{treeview}"
  labelText="Cloud Products"
  children="{children}"
/>

<style>
  div {
    margin-bottom: var(--bx-spacing-05);
  }
</style>