<pre class="language-javascript"><code class="language-javascript">/**
 * @param {(...args: any[]) =&gt; any} func
 * @param {number} wait
 * @param {boolean} option.leading
 * @param {boolean} option.trailing
 * @returns {(...args: any[]) =&gt; any}
 */
function debounce(func, wait, option = {leading: false, trailing: true}) {
 let timer = null;

 return (...args) =&gt; {
 let called = false;

 if (option.leading &amp;&amp; !timer) {
 func.apply(this, args);
 called = true;
 }

 clearTimeout(timer);
 timer = setTimeout(() =&gt; {
 if (option.trailing &amp;&amp; !called) {
 func.apply(this, args)
 }
 timer = null;
 }, wait);
 }
}</code></pre>

7. implement debounce() with leading & trailing option - O(n) time O(1) space

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This is a follow up on 6. implement basic debounce(), please refer to it for detailed explanation. In this problem, you are asked to implement an enha…