<pre class="shiki github-dark shaku"><code>// This is a JavaScript coding problem from BFE.dev /** * @param {(...args: any[]) =&gt; any} func * @param {number} wait * @param {boolean} option.leading * @param {boolean} option.trailing * @returns {(...args: any[]) =&gt; any} */function throttle(func, wait, option = {leading: true, trailing: true}) { let hasThrottleTimedOut = null; //assigning starting values let storedEvent = null; return throttledEventHandle= (event, trailingTrueCase)=&gt;{ //this is returned when someone wants to makes a function throttled, this func remembers the passed func &amp; wait time due to clousures property. storedEvent = event; //stores the most recently arrived event if(!hasThrottleTimedOut ){ if( option.leading==false &amp;&amp; !trailingTrueCase){ storedEvent = null; //nulled as event is used now hasThrottleTimedOut =true; //throttle has timed out thus the callback func was executed. } else { func(event); storedEvent = null; //nulled as event is used now hasThrottleTimedOut =true; //throttle has timed out thus the callback func was executed. } setTimeout(()=&gt;{ hasThrottleTimedOut=null; //timout over, and we are open to execute if there are new events if(storedEvent &amp;&amp; option.trailing==true)throttledEventHandle(storedEvent,true); //if wait time is done &amp; do we have a event stored within that time?, if yes, then execute it },wait) } }}</code></pre>

man i learned a lot doing this!

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This is a follow up on 4. implement basic throttle(), please refer to it for detailed explanation. In this problem, you are asked to implement a enhan…