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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.javascript
Subject: Re: Embed <script> at end of HTML vs. DOMContentLoaded handler
Date: Fri, 15 Nov 2019 17:29:36 +0100
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Julio Di Egidio:

[...]
> Indeed, the "total time of rendering" strictly speaking is not even meaningful:

It is. Because the browser will *always* need this time, regardless if
there are scripts at the beginning or at the end of the page.

The only thing which changes is, how fast the user will see "something".
But this "something" may still not be the final page when scripts will
start working with the DOM when it's ready. I have seen this often on
news websites which start rendering very quickly but even if you think
the page is fully loaded it will take some time before layout stops
"jumping around".

For example:

Go to <https://m.tagesspiegel.de> and scroll down to the end then
refresh the page to see the final layout getting built dynamically.

Then repeat the same with disabled JavaScript - you will notice that
most of the layout is missing.



-- 
Arno Welzel
https://arnowelzel.de