How to Website Performance Optimization boost ?

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How to Website Performance Optimization boost ?

Here is a JavaScript function that implements a debounce mechanism, which is used to limit the frequency of a function call. This can be particularly useful for performance optimization, especially in scenarios like handling frequent events (e.g., window resize or scroll events) where the function should not be executed immediately on every event trigger.

<script type='text/javascript'>

function debounce(func, delay) {

  let timeoutId;

  return function (...args) {

    clearTimeout(timeoutId);

    timeoutId = setTimeout(() => {

      func.apply(this, args);

    }, delay);

  };

}

// Usage

const debouncedFunction = debounce(() => {

  // Your function logic here

}, 300);

// Attach debounced function to event listener

window.addEventListener('resize', debouncedFunction);

</script>

The debounce function takes two arguments:

func: The function that needs to be debounced (the function logic you want to control the execution frequency of).

delay: The delay in milliseconds, which defines the minimum time between two consecutive invocations of the debounced function.

Here's how it works:

When the debounced function is called, it sets a timer using setTimeout.

If the debounced function is called again within the specified delay period, the previous timer is cleared using clearTimeout.

A new timer is set to execute the debounced function after the delay period.

As a result, the func is only executed if it has not been called again within the delay duration, effectively limiting the frequency of function calls.

In the provided code, the debounce function is created and then attached to the window's 'resize' event. When the window is resized, the debouncedFunction is called, ensuring that the function logic inside the debounced function is executed with a delay of 300 milliseconds between consecutive invocations.

Overall, this code is a correct implementation of a debounce mechanism for handling the 'resize' event.