When you want to code a internet web page that tons much faster in performance, then you need to have to take into consideration many points even these are tiny tags or multiple numbers of lines of code.

You are watching: Why do css @imports harm performance?

As a front-finish developer there is a big challenge then the backfinish developers. Due to the fact that the style matters first. If front-finish style is not great and high performance then the backend is nopoint.

So here the styling of the web page is incredibly important and also complex if we are achieving the performance and fast loading webweb page.

So to composing the CSS for our internet style we use many type of techniques and also the many popular approaches are:

Inline CSSInfile CSSSepaprice file CSS

The above terms are according to my pronunciation. If you think I am wrong then I apologize because as a front-end developer I much better remember these over 3 terms than exact pronouncing them.

Inline and also inline stylesheet doesn’t affect the separate style sheet. And better tbelow are additionally 2 types of importing a sepaprice style sheet into your webpage:

Using attach tag.Using
import in your CSS file or style tag.

Why execute css
imports injury performance?

Now if we compare both of the over performance wise then the initially strategy wins. Because it is an excellent means to rise performance of loading your CSS file.

And the second strategy utilizing
import tag is exceptionally harmful in acquiring performance of a internet page. So let’s talk around why perform css
imports damage performance of a webpage.

When you use
import in your css file. The internet browser waits till your
import css file is totally downloaded. Then it starts downloading the rest of the elements and also contents of the web page.

Import might be extremely convenient in writing, and also this is just a advantage of using
import.

If you really desire a great performance you must produce only a solitary stylesheet rather of developing multiple CSS papers and also making use of these in your webpage. Write good code via minimal properties which only you really require and also minify it. And usage this last stylesheet using the link tag.

I didn’t say that
import is a bad approach yet when you are very major in pack times then you could think about it.

Let say if you usage the
import direct in your html page it will certainly not impact much. But as soon as you usage
import in your stylesheet it will certainly affect much and also will reduced the speed of your webpage.

*
imports damage performance?

In the above screenswarm you have the right to see I have imported 2 CSS files a.css and b.css. Using this way will not impact your loading speed performance. Now these two stylesheets will be downloaded parallel. The performance worry occurs once you import a CSS file inside a CSS file.

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Summary

In the end I think
import is not a great strategy. Always use a link tag to include a stylesheet in your internet page. First try to make a single stylesheet of all your CSS code. But if you are dealing with multiple CSS records then you must use a link tag instead of
import.