Arrange a Masterclass

detault.css

Inline/text-level elements

Heading 3

Heading 4

Heading 5
Heading 6

a — link within text

em, strong

small, strikethrough s

Citation title; inline quote: quoted content

performance is key; CSS is everywhere

meaning discovered on

code() returns x; press Ctrl+S; sample output: OK

H2O, E = mc2

i (alternate voice), b (attention), u (non-textual annotation)

mark (highlight) within a sentence

Ruby: kanji

Advanced ruby: 東京(Tōkyō) Capital

Bidi isolate: עברית; override: abc123

Generic span and line break
here; soft wrap opportunity

Edits: old textnew text

Meter: 0.6; Progress: 30%


Book a Free Call


Hi there, I’m Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, Tweet, speak, and share code about measuring and improving site-speed. You should hire me.


Connect


Projects

Next Appearance

Learn:

I help teams achieve class-leading web performance, providing consultancy, guidance, and hands-on expertise.

I specialise in tackling complex, large-scale projects where speed, scalability, and reliability are critical to success.