You can achieve collapse and expand functionality in Tab by adding/removing a custom CSS class in the click event handler for each tab.
select event for Tab to collapse the initially selected Tab item and bind custom click handler for the Tab headers.@using Syncfusion.Blazor.Navigations
<div class="info">
Collapsible Tabs
</div>
<span style="margin: 10px;">
<i>The active tab can be toggled to expand and collapse its content.</i>
</span>
<SfTab id="BlazorTab" cssClass="e-background" Selected="@tabSelected">
<TabItems>
<TabItem Header="header0" Content="@content0"></TabItem>
<TabItem Header="header1" Content="@content1"></TabItem>
<TabItem Header="header2" Content="@content2"></TabItem>
</TabItems>
</SfTab>
<style>
#container {
visibility: hidden;
}
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
.e-content .e-item {
font-size: 12px;
margin: 10px;
text-align: justify;
}
.container {
min-width: 350px;
margin: 0 10px;
}
.info {
margin: 10px;
font-weight: bold;
}
#BlazorTab.e-tab .e-content > .e-item.e-active.collapse {
display: none;
}
#BlazorTab.e-tab .e-tab-header .e-indicator.collapse {
display: none;
}
</style>
@code {
public object header0 = new { text = "Twitter" };
public object header1 = new { text = "Facebook" };
public object header2 = new { text = "Whatsapp" };
public string content0 = "Twitter is an online social networking service that enables users to send and read short 140-character " +
"messages called 'tweets'. Registered users can read and post tweets, but those who are unregistered can only read " +
"them. Users access Twitter through the website interface, SMS or mobile device app Twitter Inc. is based in San " +
"Francisco and has more than 25 offices around the world. Twitter was created in March 2006 by Jack Dorsey, " +
"Evan Williams, Biz Stone, and Noah Glass and launched in July 2006. The service rapidly gained worldwide popularity, " +
"with more than 100 million users posting 340 million tweets a day in 2012.The service also handled 1.6 billion " +
"search queries per day.";
public string content1 = "Facebook is an online social networking service headquartered in Menlo Park, California. Its website was " +
"launched on February 4, 2004, by Mark Zuckerberg with his Harvard College roommates and fellow students Eduardo " +
"Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes.The founders had initially limited the website " +
"membership to Harvard students, but later expanded it to colleges in the Boston area, the Ivy League, and Stanford " +
"University. It gradually added support for students at various other universities and later to high-school students.";
public string content2 = "WhatsApp Messenger is a proprietary cross-platform instant messaging client for smartphones that operates " +
"under a subscription business model. It uses the Internet to send text messages, images, video, user location and " +
"audio media messages to other users using standard cellular mobile numbers. As of February 2016, WhatsApp had a user " +
"base of up to one billion,[10] making it the most globally popular messaging application. WhatsApp Inc., based in " +
"Mountain View, California, was acquired by Facebook Inc. on February 19, 2014, for approximately US$19.3 billion.";
public void tabSelected(SelectEventArgs args)
{
}
}