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<a href="/api-reference/store/findpreviousnode">findPreviousNode</a></p><h2>findPreviousNode() function</h2><p>Finds the previous node in a focus tree in focus order</p><b>Signature:</b><pre><code class="language-typescript">export declare function findPreviousNode(
  root: Node,
  from: string
): string | null
</code></pre><h2>Parameters</h2><table><thead><tr><th>Parameter</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td>root</td><td>Node</td><td>focus tree</td></tr><tr><td>from</td><td>string</td><td>id of the current document</td></tr></tbody></table><b>Returns:</b><p>string | null</p><p>the id of the previous document if it exists (<code>null</code> otherwise)</p>

Parameter	Type	Description
root	Node	focus tree
from	string	id of the current document