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Posted by surprisetalk 5 days ago

Justifying Text-Wrap: Pretty(matklad.github.io)
69 points | 25 comments
_nivlac_ 4 minutes ago|
The example for "avoid short last lines" has a short last line - if that was intentional, a great touch by the writer!
iguessthislldo 7 minutes ago||
The Webkit blog post talks about this, didn't know it had a name:

https://en.wikipedia.org/wiki/River_(typography)

albert_e 2 hours ago||
Are hypens no longer acceptable?

There is no mention of it in the post. If words (in any language) can be arbitrarily long and columns can be arbitrarily narrow, we will need to solve for this anyway.

Even without those extremes, I feel that there will always be place for the good old hypen when displaying or printing text for the main purpose of readability. No need to max out on perfect "look" in every application of text.

In fact in many places one might even find columns with jagged right edges more readable -- letting you visually distinguish each line from the one above/below it easily by length alone -- and may even lend a certain aesthetic character that is the opposite of mechanical / boring / machine produced / sterile.

Of course not negating the need for a well implemented method without bugs to justify text correctly when the use case demands it.

levocardia 23 minutes ago||
Butterick says you should never, ever justify text without hyphenation

https://practicaltypography.com/justified-text.html

ameliaquining 2 hours ago||
Auto-hyphenation is part of what text-wrap: pretty does.
notpushkin 1 hour ago||
No, it’s not. You can turn it on or off independently.
notpushkin 2 hours ago||
I’m looking at the comparison [0] and the `pretty` example is hyphenated, while greedy is not. Not sure it’s fair to compare them like that, considering we’ve had `hyphens: auto` for a while now.

Edit: it’s actually vice versa! Which I should have known because the very next paragraph says:

> But the “smart” algorithm decides to add an entire line to it, which requires inflating all the white space proportionally.

Which is exactly how the example on the right looks.

[0]: https://matklad.github.io/2026/02/14/justifying-text-wrap-pr...

crazygringo 2 hours ago|
That jumped out at me too... I'm not sure if they have different hyphenation properties set though, or if the greedy justified version just doesn't wind up hyphenating anywhere in this particular case?

Unfortunately there's no live HTML demo to inspect, just the images.

notpushkin 2 hours ago||
Just found this demo in the Safari blog post: https://cdpn.io/pen/debug/xxvoqNM
crazygringo 1 hour ago||
Fascinating, thank you!

Playing around with it, seems that Safari simply stops hyphenating entirely when when text-wrap is pretty, regardless of whether it's justified or not. (If you smoothly resize the browser width, it makes it pretty easy to tell if hyphens ever come up.)

Which means the image on the left seems like it might be the wrong image?

And now I wonder if text-wrap: pretty is supposed to avoid hyphenation? Are hyphens not pretty? Or is it just a partial implementation by Apple, that they haven't gotten around to supporting hyphenation for it yet?

notpushkin 1 hour ago||
You can get it if you carefully adjust the window width! Or there’s one example in the author’s post – the word “implementation” is hyphenated for me [1].

So it looks like the algorithm tries to minimize hyphenation, which makes sense to be honest.

[1]: https://matklad.github.io/2026/02/14/justifying-text-wrap-pr...

crazygringo 1 hour ago||
Ha. Oh wow. OK, I got "implementation" to hyphenate... but only once I changed the zoom level, and only for one specific exact window width. One pixel narrower or wider, and it stopped hyphenating.

So hyphenation exists in theory, but I'm just going to go ahead and say that however it's tuned seems completely broken.

notpushkin 1 hour ago||
Again, I think it’s very deliberate :-) Hyphenated words are slightly harder to read, so it makes sense to avoid them – maybe not as zealously, though.
sbinnee 54 minutes ago||
It reminds me of one of my favorite programs, par[1].

[1]: http://www.nicemice.net/par/

nayroclade 1 hour ago||
> Inexplicably, until 2025, browsers stuck with the naive greedy algorithm, subjecting generations of web users to ugly typography.

> WebKit devs, you are awesome for shipping this feature ahead of everyone else...

Um, no? Chrome shipped this feature in 2023: https://developer.chrome.com/blog/css-text-wrap-pretty

Safari isn't early shipping this, they're late. Though not as late as Firefox, admittedly.

notpushkin 1 hour ago|
Hmm, I’m looking at the demo in Chrome and don’t see any difference when I turn on `pretty`: https://cdpn.io/pen/debug/xxvoqNM

In Safari, it’s a very different look.

crazygringo 1 hour ago||
Yeah, very weird.

Caniuse claims it's supported in Chrome: https://caniuse.com/mdn-css_properties_text-wrap_pretty

But you're right, it very clearly isn't working.

Is it a regression? Did it break and nobody noticed?

no_news_is 1 hour ago|||
From https://webkit.org/blog/16547/better-typography-with-text-wr...

"While support for pretty shipped in Chrome 117, Edge 177, and Opera 103 in Fall 2023, and Samsung Internet 24 in 2024, the Chromium version is more limited in what it accomplishes. According to an article by the Chrome team, Chromium only makes adjustments to the last four lines of a paragraph. It’s focused on preventing short last lines. It also adjusts hyphenation if consecutive hyphenated lines appear at the end of a paragraph."

The article goes on to talk about how it's up to the browser (and not necessarily permanent) about how to handle the setting, and furthermore a new value was agreed upon to do what Chromium was doing, called "text-wrap: avoid-short-last-lines".

Here's the article on what the Chromium version does: https://developer.chrome.com/blog/css-text-wrap-pretty/

crazygringo 1 hour ago|||
Ah, OK. I finally got the demo to show a difference under one specific window width, where it changed the last line of a paragraph from one word to two words.

So it does exist... but yeah, barely does anything. Thank you for finding the explanation!

notpushkin 1 hour ago|||
Amazing summary. Thank you so much!
notpushkin 1 hour ago|||
I think the answer is in the post:

> Although Safari is the first browser to ship a non-joke implementation of text-wrap

(Emphasis mine.) Chrome is using a different algorithm for this, which probably fixes some typographic problems, but defaults to greed most of the time.

crazygringo 1 hour ago||
Interesting. As far as I can tell, Chrome isn't doing anything different. I can't find any window width where the checkbox makes any difference.

Edit: finally found it, see cousin comment.

eviks 2 hours ago|
> We are getting closer and closer to the cutting-edge XV-century technology. Beautiful paragraphs!

While the broader point is fine, the example to me is just bad to me: very narrow column with a lot of hyphens and identical width/no variety making it harder to anchor your eye (though colored letters are awesome and play this role)

Ok, bad rag is bad, but the ancient text goes overboard in the other direction. This looks close to the form-over-function vibe.

tolerance 53 minutes ago||
I’m not trying to pull your card, but can you read the language that the example is written in?
notpushkin 1 hour ago||
Justified text is really not good, yeah. `text-wrap: pretty` works fine with left-aligned text though!