Shadowing Practice: 8 New CSS, JS and HTML Features You Should Know - Learn English Speaking with Video

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Welcome to Syntax Today.

We've got eight amazing new CSS, HTML, and JavaScript APIs that you need to know about.

Wes has put together eight new demos to showcase these things.

And let me tell you, there's some cool stuff in here that I didn't even know about.

So Wes, I'm so stoked to see some of these things.

Which one do you want to start with first?

Yes, let's get into the CSS alpha being added to relative color.

I didn't even know that this was coming.

I think with a lot of these, we've been so obsessed with AI for the last six months.

There's been so much that's been added to CSS, HTML, JavaScript, that I've been looking through all this stuff.

I'm like, wow, that's awesome.

So first one, very simple, CSS relative color, which is you'd be able to take a specific color and then return the R,

the G, the B, and the A, or the HDS, the L and the A.

Now we have a short form for that, which is simply just, I want to take a color

and then I want to make it semi opaque or have transparency, right?

So this is simply just CSS background alpha.

You give it the color.

So from whether you pass it a hex, HSL, whatever, and then forward slash the percentage value that you want it to do,

then you can make, simply just make a color semi-transparent.

That's crazy.

This is something that has been what this was in like SAS.

This was in Silas.

This was in all of them.

And it was so nice when we got relative time.

Yes.

To do this dynamically in the browser.

People might say, why not just use SAS?

Well, SAS has done a build time.

We want something that's done it for in time here.

And my gosh, the browser support for this is actually pretty dang good.

It's in everything.

And I mean, it's in Safari technology preview, but it's in Firefox

in the nightly build currently

which means it'll be here soon it's been in chrome since version 151

so as of july 27 2026 and it will be in safari 27

so my gosh

that means i have it on my computer yeah i'm running i'm running safari 27 not

that i'm using it but i'm running it

it all just got added like in the last month or

so it's been added to every single browser which i think

because now that they have relative color implemented it's just a simple syntax ad i I think it's pretty low lift.

I don't think I knew that this was happening. So sick.

And if you want to see all of the errors in your application, you'll want to check out Sentry at sentry.io forward slash syntax.

You don't want a production application out there that, well, you have no visibility into in case something is blowing up and you might not even know it.

So head on over to sentry.io forward slash syntax.

Again, we've been using this tool for a long time and it totally rules.

All right.

Next one we have here is the CSS progress function.

This is something you will often do with calc, where you have a starting value and an ending value, and then you have your own value,

and you want to know where in the middle of that is this thing.

What this progress function will allow you to do is you pass it where you're at.

These values can be anything.

Dynamic.

Yes yeah you could pass it like i'm at two ems

and i want to start at eight pixels

and go to a hundred percent like that's that's the beautiful part of it is

that you can say where am i in between these two values even

if they are not of the same unit um which is

so cool so uh here i have opacity progress i'm at 300

or or 150 and i want to know where i am extrapolate that up to between zero

and a thousand and that's not hard to do with a css calc

but when you start getting into these things where you're like where am i at in between 20 pixels

and 400 percent width you know right yeah yeah this will

just do the math for you this has nothing to do with the css

or the html progress element

which i initially thought it was it is simply just how far am i in between these two values that's

so cool yes yeah it gives you a unit list value

so it you still have

if you do want it to be like a like a percent

or em or px

and you still have to coerce it with your um with

the calc yeah cool i had no idea about this one either

and it seems like this is available in everything except for firefox

so and the the reason why i'm doing this is

because uh gecko which is the engine in Firefox is intent to ship.

So all of the ones that I'm, like, where you get all of these,

like, what's new in CSS is you can look at the intent posts on the Google groups of intent.

And basically, the people who work on these browsers will say, I intend to ship this.

I intend to turn this on in all the browsers.

We intend to prototype this specific feature.

And it's kind of a cool way to see, especially a lot of these are, oh, wow, this feature is finally coming to Firefox.

Now we can start using it.

Yeah, I love that.

And the next one here is a JavaScript one, which is promise.allkeyed.

We actually talked about this recently on a syntax live.

And this is something that you said you've been doing for many years with libraries and stuff.

But now it is going to be native.

Yes.

So if you have three or four promises, like say, for example, you want to fetch a podcast, you want to fetch your users, you want to fetch a bunch of posts,

you want to do that concurrently, or most people will think you want to do that in parallel, you know, fetch them at the same time.

And if you want to have multiple promises fetched at the same time,

you use promise.all or promise.all settled right yeah and the problem with

that is that those only take arrays meaning that the order

at which they come back is is important

so you have to do this like weird loop over the results

and use the index of the value this you simply just make an you make an object

and then instead of the the properties on that object can be promises

so fetch user fetch posts and then you can just await

that object and it will know that there are keys in

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that object that need to wait to be resolved

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and then once it is done it'll return

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that entire object with the resolved keys

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or you can a lot of people are going to just simply destructure those values straight on out

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yeah that rips and it just feels like a nice quality of life thing

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that will make your code read better anything you couldn't do

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before lots of utilities to do this type of thing but like like we're at a point now where like,

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yeah, we can really make the JavaScript language itself have some really nice APIs.

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A lot of people are like, oh, why don't we just use a library for that?

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I don't want a library for this.

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This is something I do all the time.

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Yes, okay.

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Something also here that it feels like an HTML element

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that should have been added a long time ago or two HTML elements.

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I'm not sure about this one.

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I'm curious to see what you think.

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And this one is just in prototyping stage.

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Okay.

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Well, if you're asking me, it does feel like, so this is to say, this is the camera and the microphone HTML elements.

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For me, it feels like a nice way of,

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what's the word that they use for declaratively writing things that use the camera and the microphone,

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which for some reason, because they are physical objects, they have like this, like that feels like they deserve to be represented in that way.

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But they are these things even useful without connecting them with JavaScript.

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I mean, I like this.

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Yeah.

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You have if you want to access somebody's camera or microphone, there are new elements.

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I believe there's also a media element, which is a little further ahead than this.

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And it will simply just request access to those things.

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And typically what you'd have to to do is you'd have to programmatically do it like navigator.media.devices.getusermedia.

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And that would then say, hey, can I access your webcam?

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Can I access your microphone?

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And then they would say yes, you would get the stream.

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And then you take that stream and then you put it into whatever you want.

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You display it on a video element.

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You start recording it with a media recorder, et cetera.

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This is a declarative way to do that, which I don't know.

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it doesn't make much sense to me because you still have to like, once you have that track, then you still have to listen for the events of like,

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someone gave you access to the camera and then you, you, you still have to use regular JavaScript.

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So like, I don't, I don't see the benefit of this unless like

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so much of the recent HTML that we've gotten are trying to do things declaratively without needing JavaScript.

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Yeah.

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Like invokers or yeah.

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Yeah, maybe this is going to play on with the Invokers API,

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where you could just click together a very basic photo booth without any JavaScript.

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Yeah, I don't know.

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I'm not sure about this one.

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But it seems interesting.

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I think you've talked me out of it yeah i thought

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at first i thought i was like oh this is cool

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and then you're like why did this yeah i don't know

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yeah i guess kind of right um this next one here

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which is the css attribute function

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or attr now this function has been around in the web

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for a billion years uh this this function was back

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when the dinosaurs were roaming the earth they were writing the css attribute function.

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But what's changed in this modern implementation of the attribute function is that you can actually use the values in a,

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like a real way, kind of turning this into almost like props for CSS, like directly in the browser.

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You could only use it ATTR with what, like content?

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And now you can use it with anything, background, width, height, et cetera.

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Yeah, now you could pass this stuff directly into your CSS.

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Basically, you could set a property on a div and have

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that act as like a prop and access that value directly in your CSS.

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It's sick.

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I'm curious if you'd be able to use value here because value in HTML is like input value.

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Let's say you have a range.

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But does that update when the JavaScript value updates as you scroll it?

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I'm not quite sure.

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It would be really nice if you could, because then you could just take the, you could pipe that into the progress function we talked about earlier, right?

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Yeah, right.

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Yeah, can I use value?

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Yeah.

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This has been in everything for quite a while, except for Firefox.

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And now we're finally in a spot where it's in intent to ship in Gecko.

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So it's one of those things where you can just finally use it.

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And this is, again, this is make declarative work a lot easier especially

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if you have like a library where you want to pass

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in things like button data dash size small medium large right any of these like modifiers

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that you're used to passing in to each of them now

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you can simply just pass them as attributes likely data dash

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attributes though it doesn't it's not entirely necessary to have the

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data dash on it yes this next one here is css sibling index function

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and the sibling count function if you've ever watched any of our css battles on this channel.

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You've seen us use these functions in your options.

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So what these do, they give you the current index of an item

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or the count of how many items there are that are siblings.

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And the only way you could do this type of work

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where you don't know how many items are in a list or in our siblings is by counting them with JavaScript.

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That's the only way you could have done it before

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or you could just have nth child one nth child two nth child until every single possible use case

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and that's like yeah that's not the way to do it right

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so tell us about sibling index

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and sibling count yeah it's very simple it tells you how many items are of a sibling

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so here i have a circle

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and like the example where we've done it in our css is we did this navigation that was a 360 degree circle.

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And if you don't know if you have three items in there

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and you want to evenly space them around in a circle

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and you want to calculate the rotation value or the rotation angle of that item.

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So if you have four of them, it's going to be 0, 25, 50, 75, right?

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But if you have five of them, then that value changes.

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And the more you add, the less of an angle each one needs to be.

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So previously, yeah, you'd have to do like, okay, well, if the nth child five exists, then there must be five, then do this.

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And you'd have to do every single instance of it, or you would calculate them in JavaScript, like you said, and you'd pass that in via variable.

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So this just makes it so much easier.

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And we've done many, many in all of our CSS challenges.

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I think we always reach for this one.

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And then you guys gave me a hard time for using it in my challenge because it didn't work.

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in any of the other browsers, but now we can.

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I gave you a hard time because very specifically, I had made two versions of my app,

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one without JavaScript and one with JavaScript to just showcase the need for that.

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And I could have used it, I knew about it, but I chose not to.

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And so you were like trying to be like, mine's better.

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Yeah, so.

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Again, it's another one of these that Firefox has just shipped, meaning that it is now in all the browsers and you can go ahead and start to use it.

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It's been in Safari since 26.2.

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It's been in Safari for almost a year.

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So we're in good shape now.

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Yes.

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Heck yes.

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Heck yes.

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All right.

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Next one here is shrink to fit container.

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I, I don't necessarily understand this one.

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I mean, I understand it, but I don't get the usage for it.

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Yeah.

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This, I can tell you, I have run into this once before.

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So what, what this does is if you have some content and the width of that content,

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you set to fit content.

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The width of that element, like let's say we have a paragraph tag and it wraps around.

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Normally, it's a block element, so it's just going to take 100% width as much as it has, right?

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But if you want that paragraph to just be as wide as it is,

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especially with text wrapping, then you say width equals fit content, meaning that be as wide as the actual element.

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Now, the problem is, is that if you have an element that wraps some fit content, then that thing is still with 100%, right?

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And you can't do with the fit content on that as well.

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And it's a bit of a pain.

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And then you're getting into like, maybe I should float this and it's a nightmare.

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So now there is a property max content sizing shrink to fit.

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and that will simply just allow you to suction the parent element to the size of some fit content

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which again maybe not something you're hitting every single day

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but i can tell you i run into it once yeah

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yeah i i once is enough i guess i maybe i will hit this

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and be like oh shrink to fit container the next one

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here though is something i do hit all the time which is text box trim and text box edge, text, man, fonts, they are all wacky.

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And now you're rendering them and too many times you're just trying to get your freaking button to look good, right?

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Yeah, so what this will do is it will allow you to trim,

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like basically if you think about like a line height one and like how that is calculated on some texts, right?

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It will take into account the very highest of the capitals in the very lowest of the descenders, right?

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So if you have big capital A, a Y that goes down, then the height of that text, even if you don't use those letters,

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the height of that line or that text box is going to be huge.

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And where you can get into trouble, let me show you on the mad CSS website that we did it.

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We have this admit one right here.

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And I put text box trim cap alphabetic.

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So if I take that off, you can see that the bottom of this text here, and if you're audio listeners,

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imagine that the bottom of the text being larger than the top, and it's not perfectly vertically centered.

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And this drives you mad because I don't have any letters here that are ascending or descending.

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It's all capital.

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So what I did is I said text box trim, cap alphabetic, and that just trimmed it directly to all of the letters.

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And then that allowed me to put a padding on the top and the bottom.

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And it was exactly the same on the top and the bottom, which I absolutely love.

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So again, this has been in all the browsers except for Firefox.

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And now they are finally, it's an intent to prototype.

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So not just quite yet.

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But yes, this has been in Chrome since February 2025.

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So yes, that's before Opus 4.5 came out.

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That's how long ago this thing was.

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But I don't know, man, I hope I hope we get this soon because this is one of the things where you can add it already.

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You can start using it today and then in browsers that don't support it.

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It just looks a little bit weirder, but progressive enhancement at all.

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Yes, exactly.

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You can decide where you would like to trim the top and the bottom of your pieces of text.

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I'll be using this one.

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Beautiful.

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Yes, absolutely.

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Wes, thank you for putting together these demos.

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You're going to make this page available for people who are

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audio listeners who want to see what you're talking about and give it a try.

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I'll slap it up.

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We'll put the link in the notes.

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All right.

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Slap that bad boy up.

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Thank you so much for this, Wes.

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Thank you.

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All right.

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Thanks for tuning in.

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Peace.

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Peace.

285

Thank you.

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אוצר מילים והערות הגייה לשיעור הזה

שיעור הדיבור הזה ברמה C1 מבוסס על הסרטון “8 New CSS, JS and HTML Features You Should Know”. המילים שחוזרות הכי הרבה: css, value, Javascript. בסרטון הזה יש 285 משפטים ו-3313 מילים לתרגול Shadowing. הדיבור נמשך 18:27. הדובר מדבר מהר, כ-180 מילים בדקה, אז צפו לצלילים מחוברים ומקוצרים. 85% מהמילים נמצאות בין 3,000 המילים הנפוצות ביותר באנגלית; כדאי ללמוד את השאר לפני שמתחילים.

אוצר מילים מרכזי בסרטון הזה

15 המילים המתקדמות ביותר בסרטון, עם ההגייה והמשמעות שלהן:

מילה	הגייה	משמעות
sibling שם עצם	/ˈsɪb.lɪŋ/	אַחַאי
fetch פועל	/fɛt͡ʃ/	הביא, השיג
width שם עצם	/ˈwɪtθ/	רוחב \ רֹחַב
syntax שם עצם	/ˈsɪn.tæks/	תַּחְבִּיר
safari שם עצם	/səˈfɑːɹ.i/	ספארי
attribute שם עצם	/ˈæt.ɹɪˌbjut/	לוואי, לְוַאי
microphone שם עצם	/ˈmaɪ.kɹəˌfəʊn/	מִיקְרוֹפוֹן
calculator שם עצם	/kæl.kjə.leɪ.tɚ/	מַחְשְׁבוֹן, מונה
prototype שם עצם	/ˈpɹəʊtətaɪp/	אב טיפוס
calculate פועל	/ˈkælkjʊleɪt/	חישב \ חִשֵּׁב
dash שם עצם	/ˈdæʃ/	קו מפריד
gecko שם עצם	/ˈɡɛk.oʊ/	שממית
listener שם עצם	/ˈlɪs(ə)nɚ/	מַאֲזִין
pixel שם עצם	/ˈpɪk.səl/	פִּיקְסֶל, פִּיקְסֶלִים
slap שם עצם	/slæp/	סְטִירָה

Phrasal verbs שתשמעו

מילה	הגייה	משמעות
blow up פועל		פוצץ, התפוצץ
check out פועל		בדק
come back פועל		שָׁב
come out פועל	/ˌkʌm ˈaʊt/	יָצָא
go down פועל		ירד

משפטים שכדאי לחזור עליהם

משפטים קצרים ושלמים מהסרטון שאפשר להשתמש בהם בשיחה יומיומית:

Which one do you want to start with first?
I didn't even know that this was coming.
I'm like, wow, that's awesome.
I don't think I knew that this was happening.
Can I access your microphone?

דקדוק בסרטון הזה

המבנים שהדובר משתמש בהם הכי הרבה, עם המילים המדויקות מהסרטון:

מבנה	בסרטון
הווה מושלם ממושך (Present perfect continuous) have/has been + -ing — פעולה שהתחילה בעבר ועדיין נמשכת עכשיו	I've been looking · we've been using · you've been doing
הווה מושלם (Present perfect) have/has + past participle — פעולה שקרתה בעבר ועדיין יש לה חשיבות או השפעה עכשיו	has put · we've been · There's been
משפטי זיקה (Relative clauses) who / which + clause — מידע נוסף על אדם או דבר	color, which is · that, which is · gecko which is
סביל (Passive voice) be + past participle — הדגש הוא על מה שקורה, לא על מי שעושה את הפעולה	being added · been added · be resolved

הגייה ששווה לשים לב אליה

הדובר משתמש ב-78 קיצורים וצורות מקוצרות, כמו don't, I'm, you're. אמרו אותם בצורה הקצרה, כפי שאתם שומעים אותם.

הצלילים של “sh” ו-“zh”: dash /ˈdæʃ/, gosh /ɡɑːʃ/, showcase /ˈʃoʊˌkeɪs/, rotation /ɹoʊˈteɪʃən/, suction /ˈsʌkʃən/
מילים ארוכות — שימו לב להטעמה: calculator /kæl.kjə.leɪ.tɚ/, alphabetic /ˌæl.fəˈbɛt.ɪk/, declarative /dɪˈklæɹ.ə.tɪv/, declaratively /dɪˈklæɹ.ə.tɪv.li/, extrapolate /ɛkˈstɹæp.əˌleɪt/

צלילים שדוברי עברית מתקשים בהם:

/w/ — שפתיים מעוגלות, לא /v/: width /ˈwɪtθ/, webcam /ˈwɛbˌkæm/, await /əˈweɪt/
/æ/ — פתוח יותר מה-“אֶ” העברית, לא כמו “a” ב-“cup”: syntax /ˈsɪn.tæks/, attribute /ˈæt.ɹɪˌbjut/, calculator /kæl.kjə.leɪ.tɚ/, calculate /ˈkælkjʊleɪt/, dash /ˈdæʃ/
/r/ — הלשון לא נוגעת בשום מקום, לא ה-“ר” הגרונית: browser /ˈbɹaʊ.zəɹ/, trim /ˈtɹɪm/, safari /səˈfɑːɹ.i/, attribute /ˈæt.ɹɪˌbjut/, microphone /ˈmaɪ.kɹəˌfəʊn/

איך לתרגל עם הסרטון הזה

הקשיבו לכל הסרטון פעם אחת בלי לדבר, ורשמו את המילים שאתם לא מכירים.
התחילו במהירות 0.75×, תרגלו Shadowing משפט אחר משפט, וחזרו למהירות רגילה כשזה מרגיש קל.
הקליטו את עצמכם והשוו למקור, תוך תשומת לב למילים כמו sibling, fetch, width.

מהי טכניקת השאדואינג?

שאדואינג היא טכניקת למידת שפה מבוססת מדע שפותחה במקור להכשרת מתורגמנים מקצועיים ופופולרית על ידי הפוליגלוט ד"ר אלכסנדר ארגואלס. השיטה פשוטה אך עוצמתית: אתה מקשיב לאודיו באנגלית ילידית וחוזר עליו בקול רם מיד — כמו צל העוקב אחרי הדובר עם עיכוב של 1–2 שניות בלבד. בניגוד להאזנה פסיבית או תרגילי דקדוק, שאדואינג מכריח את המוח והשרירים בפה לעבד ולשחזר דפוסי דיבור אמיתיים בו זמנית. מחקרים מראים שזה משפר משמעותית את דיוק ההגייה, האינטונציה, הקצב, הדיבור המחובר, הבנת השמיעה ושטף הדיבור — מה שהופך אותו לאחת השיטות היעילות ביותר להכנה לIELTS Speaking ולתקשורת באנגלית בעולם האמיתי.

טכניקת Shadowing: קרא את המדריך המלא שלב אחר שלב →

Shadowing Practice: 8 New CSS, JS and HTML Features You Should Know - Learn English Speaking with Video

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מהי טכניקת השאדואינג?