h></svg><svg class="copyButtonSuccessIcon_VWe2" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ol start="2"><li>Next declare your SubApp in another file, say &quot;app.tsx&quot;, and use the <code>declareSubApp</code> API and dynamic import your subapp.</li></ol><div class="language-tsx codeBlockContainer_Op_Y theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_aGc