Welcome to Syntax. We've got a Pollock episode for you today, which is you bring the questions. We bring the answers. Keep the questions coming, folks. Go to Syntax.com. In the bar, there's a hyperlink you can click on and you can give us your question. We'll answer it in an upcoming episode. Today we got some really good questions on should every developer be a full stack developer? A lot of people have frustrated that all the

job postings want you to do absolutely everything. How should you review a pull request? What does

that even look like? Migrating a large PHP app. What is the use of the CSS ATTR function?

So it just landed in Chrome. You can use it on all the HTML elements. What is possibly the use for that? And then some Vsco

tricks. Some really good questions today. Let's get on into it. First question we have here from Big Dave. When is the

appropriate time to use request animation frame and does it differ in React's felt angular? Yeah, this is a cool question. Request animation frame is a function in JavaScript that essentially allows you to

queue up some work that needs to be done.

And very likely that has to do with updating the DOM or something that will cause a

repaint on the page.

So I'll use this if I'm trying to

draw something to the page or if you're trying to use a canvas and you're trying to update the

canvas as often as you want. Now, normally you would think, okay, well, I want to run this thing,

like maybe some, some monitors are 30 frames a second,

some monitors are 60 frames a second, and some monitors are 120 frames a second.

And then you have to think about like computation as well, meaning that like maybe you can't

run that as often as you want because it's it's computationally expensive

and maybe you're only going to get 20 frames out of there so there's this like problem with

the browser is like how often do I run this updater function and instead of having to figure any of

that out you simply just run request animation frame meaning that you say hey

browser I would like to paint this when you are next able to paint please go ahead and

run this function to update the canvas or to rotate an item a certain amount and so on. So it's pretty nice because you don't

really have to figure out how frequently you want to run something. You just ask the browser and it's

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