How to turn things on & off on your website using Bootstrap 4
Hey there in this video we are going to show you how to turn boxes on and off using bootstrap four. Okay. We've got four feature boxes down the bottom here, we're gonna make it smaller. There's still four ah a tablet. There's only three because that's what fits best when we get down to mobile. The fourth one is back again. Okay. So we're gonna show you how to turn the display on and off for different boxes using bootstrap. Okay, so we want to disable one of these feature boxes. Okay. On the tablet view on our MD because at the moment you can see it here on M. D. I've got this kind of fourth guy that needs to disappear. It's super simple. The documentation is get bootstrap dot com documentation utilities and its under display. Okay. And scrolling down, you end up with this one called hiding elements and it's a it's simple and then brain bending at the same time. So what they've done happily is that they've given you like all these use cases? So just ask yourself what do you want to do? ...
Read through them, pick which one, apply these. Okay. So basically is D. K. Is short for display. We've done that in previous courses. Remember we display none and display block. So we're gonna be switching between these two. Okay. And if I don't write a media query extension like small. Okay, I just write D None. It's going to assume all of them are done. So it starts city. None is basically the mobile phone version. And because it flows mobile first it'll flow through the small, medium large and XL so that's so if you turn them all off and you can see here hidden only on the extra small. Okay, so it's turned off all of them including Extra small. But then the very next media code you've turned them back on by saying on the small one block. And because it's an M. D. And larger afterwards they all become block and all are visible. It does get a little confusing. Let's just do it for our example in V. S. Code. So it's this fourth one. Okay, I'm going to add numbers to them to make it a little easier. Two three four. Okay. And we just added another class to this to say on what are we going to do D for display? We're gonna do on which one? We're going to do it for medium, we're going to do none. Save it. Let's have a little look. So in my example here he's gone so at small he's there. Okay. Or extra small is there? Then it's small. Which is this media query here? It's there but then at medium it's gone but at large he's also gone because it flows downstream because it starts at mobile first. You get the idea we're gonna turn it back on after medium because we turned it off a medium. Let's turn it back on at large. So let's say at the display at LG is back to block. Cool. And hopefully boom. So it's on down here, turns off at medium and then back on large And then again at extra large. He's still there because of that. Nice flow. Alright, one last thing I want to mention just while we're here is that some of the links I've had or some of the searches you do on Google, you might end up at get bootstrap.com and the docks and it actually has the version number in here. So this is the very first version of when it went to 4.0, it took forever to get there but went from 3 to 4. Were actually up to if you got a home. Okay, well when I made this video, okay. We're at where we 4. point one you're probably going to be at a lot higher. Probably still at four if you're it's 2019 if you're watching within the next couple of years, I have no idea really. But you'll check this and I bet it's still at four but this will change. So the document when they change it, they actually have to update the documentation so you might end up at an old bit of documentation like that one. Okay. That link that I found. Okay, send me to four. Okay. If I go instead of using a google search to find it. I go to Bootstrap and I go to documentation. I go the long way instead of using google to find it and I go into was it utilities display and then further down here. Okay. It is. Whereas hiding elements, It looks exactly the same, but you can see her at 4.3 because one of those changes from maybe 4.22, 3 might be we're going to change this display thing because it's not working and it might this index might be completely different or you might be working on an older site. Okay. Say you're working on somebody else's site and they've built their site on an old version of bootstrap. You can see here our version of Bootstrap is we're referencing the CSS From their website called 184.108.40.206. Okay. If I'm dealing with just zero. Okay. Yeah. Some of the new things that have updated since then might not work or have problems. So basically the rule is, it's I guess it's just a just something to be aware of, it's not going to catch you out. Probably. Okay. Because what you do is when you're building this site, you're going to build it on whatever version and you've written it up here explicitly. What happens is it goes to Bootstrap looking for that version. Okay. And uses your website based on all the rules that applied when that was made. So this might be 10 years from now. As long as bootstraps websites still going they'll have the 4.3.1 up there that will reference to use this website so it'll keep working Even though they might be up to version 20 by then. Does that make sense? All I want to do is just make sure go through the long way. Okay. Just to make sure click on documentation, figure out where it is, or at least just keep an eye up here to see what version you're actually interacting with. All right, that's enough for this video. Let's jump into the next one.