Implement the scenario utility: Custom getElementById traverse. Discuss edge cases, runtime performance, and alternative paradigms.
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Example usage
function customGetElementById(root, id) {
if (!root || !id) return null;
// BFS queue traversal to inspect nodes iteratively
const queue = [root];
while (queue.length > 0) {
const curr = queue.shift();
if (curr.nodeType === 1 && curr.id === id) {
return curr;
}
const children = curr.children || [];
for (let i = 0; i < children.length; i++) {
queue.push(children[i]);
}
}
return null;
}
// Example placeholder (requires DOM environment)
// console.log(customGetElementById(document.body, 'main-container'));05
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