Building Data-Driven Web Apps with Flask and SQLAlchemy Transcripts
Chapter: Bootstrap and frontend CSS frameworks
Lecture: Buttons and forms in action
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Let's open up our project again
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and now we're going to create some kind of login form
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using all the Bootstrap things.
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We're going to use the stuff to style forms in Bootstrap
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and the stuff to create buttons, of course
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to submit those forms and navigate around.
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So, just go over here and create a new HTML file
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call it buttons, here we go.
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Now, let's just go and make a little room here
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and we're going to have a form, and in the form
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it's going to have an action that posts back to this page
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so that's going to be fine, and the method will be post.
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In our little form here, let's have a couple of inputs.
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One of type = texts, we could set the name
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to be email, so it'll get submitted back
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and let's do another input, type password
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the name, you guessed it, password, like that.
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And let's have a button here and on the button
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I'm going to have type = submit and the message will be login
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but also maybe if you don't have an account
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we'll just have a button that says, or hyperlink
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for the moment, that says register.
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So, we'll call this register.html
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we can make that in a second, and this'll just be
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register, create an account, you know, whatever.
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Let's really quickly create that.
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We won't do anything with it, but just so it works
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when we navigate over to it.
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Let's see this beautiful site that we've created
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how are we doing here?
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Oh, that's good looking, isn't it?
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Well, I guess it's good looking for 1995
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but no, it is not.
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However, our form is in place
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and we can submit it, you see the little flicker
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right there, or we could go over and register.
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So, it's kind of working.
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I don't know what those are, right
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maybe that's an email, username, I don't know
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something like that.
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So, let's do a little more work here
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say a placeholder, this is going to be email
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we'll do a placeholder and this'll be password
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and then let's make them both required.
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Here we go, that looks a little bit better
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when we try to submit it, say that it's logged in
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and we could even do one better here
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instead of being type text, this could be type email.
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So now, if we just put stuff in there
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it'll say no, no, no, that's not an email address.
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Super, okay, well it looks terrible.
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Let's make it look better with Bootstrap.
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So, the first thing that we're going to do
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is we just have to include Bootstrap in our page.
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Now, normally this would happen, kind of
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automatically in Flask, right?
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We would just be using our common layout theme
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and we'd wrap up our little content in that
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so this would happen automatically
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but for this one, we've got to do this
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and just doing that, let's have a quick look
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and see how it looks now.
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Well, maybe without the thing.
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So, it already looks better, you know
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there's still more to do, it doesn't look
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like a Bootstrap form, these aren't buttons
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from Bootstrap but it does look a tiny bit better.
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Let's add just a little bit of style here
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we would normally put this in a style sheet
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but I'll just put it in a style tag
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just so it's all together and simple right here
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for this super simple example.
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So, let's go to our inputs and say that they have
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a margin of 10px.
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Here we go, that looks a little better.
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And then, let's say that we have a form
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and the form has padding of 20px.
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Still looking kind of boring, but a little bit better.
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The last thing to do, let's focus on the buttons.
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Right, that's the primary part of this
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what we're trying to focus on right now.
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So, we have two things here.
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Like I said, they haven't taken on any Bootstrap styles
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cause we need to add certain classes to them.
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So, in order to get this to work, we need to say
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that this has a class of btn.
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Now, Bootstrap likes to have these, sort of
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category and then modifier classes
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so we would say btn, and then what kind of button
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btn- we could have danger, we could have dark
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we could have success, we could have primary
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things like that, okay?
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So, let's go with success here, and just see what happens.
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Do a quick little refresh, ooh.
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That's looking a lot nicer.
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It's a little bit bigger than the form
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so we can also form input, so we can say
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it's a small button.
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It's not perfect either, but I feel like
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that's slightly better.
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And we also have this one, so this is actually
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an HTML button, right, this one is a hyperlink.
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But it doesn't matter, we can apply the same
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basic class to it.
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But instead of doing success, let's say this one
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is danger, now, we don't really mean danger
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but it makes it red, and red tends to convert well
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or get attention, or so on.
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So, here you go, just as simple as that
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we have a true button that submits the form
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or attempts to submit the form
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and then one that's also a hyperlink
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that just navigates us away.
