When you visit a website, your browser connects to a server via TCP. With TCP, the first roundtrip can be up to 14 KB large.
In other words, the first 14 KB sent to the client will always be the quickest to render in the browser. The rest of the response is streamed afterwards.
This website's homepage is about 9.7 KB at the time of writing. Articles are roughly 4-10 KB, depending on their lengths. All CSS is inlined, so besides fonts and images everything is loaded withing the first roundtrip, making page loads fast and snappy.
Not all sites can be contained within 14 KB — most probably can't. But keep the number in mind, and try to optimize the first 14 KB instead.
Chris Coyier consolidated an array of opinions about what it means to be a frontend developer today.
On one side, an army of developers whose interests, responsibilities, and skill sets are heavily revolved around JavaScript.
On the other, an army of developers whose interests, responsibilities, and skill sets are focused on other areas of the front end, like HTML, CSS, design, interaction, patterns, accessibility, etc.
It's that other side that seems to really be feeling this divide. A quote from Mandy Michael:
What I don’t understand is why it’s okay if you can “just write JS”, but somehow you’re not good enough if you “just write HTML and CSS”.
When every new website on the internet has perfect, semantic, accessible HTML and exceptionally executed, accessible CSS that works on every device and browser, then you can tell me that these languages are not valuable on their own. Until then we need to stop devaluing CSS and HTML.
A lot of these excerpts really hit home. I'm looking forward to the conversation this might spark.
Read the full piece on css-tricks.com.