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newbie in Blazor. Need to try out how to use BS carousel in Blazor.
I used below code in the Default Blazor app. But it does not work. What I need to do?
Thanks
I added this line in the Index.html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
In the Counter page. I added the following:
<div class="container">
<div class="carousel-inner">
<div class="item active">
<img src="la.jpg" alt="Los Angeles" style="width:100%;">
<div class="carousel-caption">
<h3>Los Angeles</h3>
<p>LA is always so much fun!</p>
</div>
</div>
<div class="item">
<img src="chicago.jpg" alt="Chicago" style="width:100%;">
<div class="carousel-caption">
<h3>Chicago</h3>
<p>Thank you, Chicago!</p>
</div>
</div>
<div class="item">
<img src="ny.jpg" alt="New York" style="width:100%;">
<div class="carousel-caption">
<h3>New York</h3>
<p>We love the Big Apple!</p>
</div>
</div>
</div>
<a class="left carousel-control" href="#myCarousel" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#myCarousel" data-slide="next">
<span class="glyphicon glyphicon-chevron-right"></span>
<span class="sr-only">Next</span>
</a>
< /div >
-- Update: Index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<title>BlazorCarouselTest</title>
<base href="/" />
<link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
<link href="css/site.css" rel="stylesheet" />
<script src="css/bootstrap/jquery-3.4.0.min.js" type="text/javascript"></script>
</head>
<body>
<app>Loading...</app>
<script src="_framework/blazor.webassembly.js"></script>
</body>
</html >
346
Carousel needs a bit of javascript code, it needs to be configured on page load, but, into a blazor page, nobody calls the initialization for the component. The good news is that you can do it by code. 1.- Create and include javascript on blazor (you can copy paste this code at bottom of your index.html page ) 2.-
Bootstrap+Blazor essentials When you start a new Blazor project it will quickstart you with a default Bootstrap template. But when you spent several weeks or months on the project you starting to notice that there is a lot of duplicate HTML code that can be refactored and moved into components.
The class="carousel" specifies that this <div> contains a carousel. The.slide class adds a CSS transition and animation effect, which makes the items slide when showing a new item. Omit this class if you do not want this effect. The data-ride="carousel" attribute tells Bootstrap to begin animating the carousel immediately when the page loads.
I should probably try Bootrstap toasts someday. Bootstrap has a Modal component but it is highly dependant on JavaScript. In my work with Blazor, I prefer to minimize the amount of JS code overall, so I use Blazored.Modal - an amazing native component for Modals. You should check it out.
Carousel needs a bit of javascript code, it needs to be configured on page load, but, into a blazor page, nobody calls the initialization for the component. The good news is that you can do it by code.
Three easy steps:
1.- Create and include javascript on blazor (you can copy paste this code at bottom of your index.html page )
<script>
window.initializeCarousel = () =>
{
$('#carouselExampleIndicators').carousel({interval: 2000});
//see step 2 to understand these news id's:
$('#carouselExampleIndicators-prev').click (
() => $('#carouselExampleIndicators').carousel('prev') );
$('#carouselExampleIndicators-next').click (
() => $('#carouselExampleIndicators').carousel('next') );
}
</script>
2.- Change a bit the carousel's html ( remove href from carousel-control-prev divs. Add an id for prev and next controls ):
<div id="carouselExampleIndicators"
class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
<li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
</ol>
<div class="carousel-inner">
<div class="carousel-item active">
<img class="d-block w-50" src="..." alt="Pepa Pig">
</div>
<div class="carousel-item">
<img class="d-block w-50" src="..." alt="Sponge Bob">
</div>
</div>
<a id="carouselExampleIndicators-prev"
class="carousel-control-prev" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a id="carouselExampleIndicators-next"
class="carousel-control-next" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
3.- Call the previous code after first render:
@page "/counter"
@inject IJSRuntime JsRuntime;
...
@functions {
int currentCount = 0;
bool firstRender = true;
...
protected async override Task OnAfterRenderAsync()
{
if (firstRender)
{
await JsRuntime.InvokeAsync<object>("initializeCarousel");
firstRender=false;
}
}
That's all:
Let us know if you your carousel is moving now!
Edited
Remember to include all js needed to run bootstrap carousel on index.html:
<body>
<app>Loading...</app>
<script
src="https://code.jquery.com/jquery-3.4.1.min.js"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
<script src="_framework/blazor.webassembly.js"></script>
<script>
window.initializeCarousel = () =>
{
$('#carouselExampleIndicators').carousel({interval: 2000})
$('#carouselExampleIndicators-prev').click (
() => $('#carouselExampleIndicators').carousel('prev') );
$('#carouselExampleIndicators-next').click (
() => $('#carouselExampleIndicators').carousel('next') );
}
</script>
</body>
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