The comparison between dynamically adding elements through Javascript and hiding them using CSS

I am contemplating the advantages and disadvantages of adding elements to a page and setting display:none versus creating a function that dynamically generates the elements and appends them where needed.

In my current situation, I am implementing a reply box that is attached to the desired comment for replies. Currently, I hide it using CSS and then relocate it to the desired node using an onclick function. Is there a more optimal approach? I am relatively new to considering DOM rendering times, but I want to ensure I am following best practices moving forward.

Answer №1

Personally, I find using JavaScript to dynamically create elements on the client side to be advantageous.

Here are my reasons:

It results in cleaner HTML code.
You have more flexibility in where you can place the generated elements.
Avoids the need for unnecessary CSS to handle element visibility.

An additional benefit is that even if a user has JavaScript disabled in their browser, the elements won't load since they are hidden with CSS on page load, saving unnecessary resources.

Answer №2

One of the key distinctions between the two lies in the fact that content embedded in your HTML is accessible to search engines for indexing, whereas DOM elements generated through Javascript are not.

In terms of DOM rendering speed, the difference should be minimal, provided that your code is structured and efficient.

It's safe to say that toggling visibility with CSS will generally outperform using JavaScript for the same purpose.

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