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Header

This section explains about modifying the style of Tab header, and configuring its icons and positions.

Styles

You can customize header styles by adding predefined classes in the Tab root element. The pre-defined CSS class names are as follows:

  • e-fill: The Selected Tab header background is set as solid fill.
  • e-background: Tab header has a solid fill background, and the selected header has a highlighted border.
  • e-background e-accent: Tab header has a solid fill background, and the selected header has a highlighted border with accent color.

If the above custom style classes are not included in the root element, the default style is applied to the Tab items.

Source
Preview
app.vue
<template>
   <div id="wrapper" style='margin-top: 20px'>
   <div id='content' style="margin: 0px auto">
          <div id="default" style="padding-top:20px;width:250px">
            <div class='row'>
                <div>
                    <label> Header Style </label>
                </div><br/>
                <div>
                    <ejs-dropdownlist ref='headerStyles' :dataSource='headerData' :change='onChange' :value='value' :fields='fields' :popupHeight='height'></ejs-dropdownlist>
                </div>
            </div>
        </div>
        <br/>
     <div>
             <ejs-tab id='element' ref="element">
          <e-tabitems>
                    <e-tabitem :header='headerText0' :content="content0"></e-tabitem>
                    <e-tabitem :header='headerText1' :content="content1"></e-tabitem>
                    <e-tabitem :header='headerText2' :content="content2"></e-tabitem>
       </e-tabitems>
    </ejs-tab>
        </div>
      </div>
 </div>
</template>
<script>
import Vue from 'vue';
import { TabPlugin } from '@syncfusion/ej2-vue-navigations';
import { DropDownListPlugin } from "@syncfusion/ej2-vue-dropdowns";
Vue.use(DropDownListPlugin);
Vue.use(TabPlugin);
export default {
  name: 'app',
     data: function(){
        return {
         headerData : [
        { Id: 'header1', headerStyle: 'default', text: 'Default' },
        { Id: 'header2', headerStyle: 'fill', text: 'Fill'},
        { Id: 'header3', headerStyle: 'background',text: 'Background' },
        { Id: 'header4', headerStyle: 'accent', text: 'Accent' }
        ],
      fields: { text: 'text', value: 'headerStyle' },
      height :'220px',
      value : 'default',

          headerText0: { text: 'ASP.NET' },
          headerText1: { text: 'ASP.NET MVC' },
          headerText2: { text: 'JavaScript' },

         content0: 'ASP.NET is an open-source server-side web application framework designed for web development to produce ' +
        'dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, web applications ' +
        'and web services. It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor ' +
        'to Microsoft\'\s Active Server Pages (ASP) technology. ASP.NET is built on the Common Language Runtime (CLR), allowing ' +
        'programmers to write ASP.NET code using any supported .NET language. The ASP.NET SOAP extension framework allows ' +
        'ASP.NET components to process SOAP messages.',

         content1: 'The ASP.NET MVC is a web application framework developed by Microsoft, which implements the ' +
        'model–view–controller (MVC) pattern. It is open-source software, apart from the ASP.NET Web Forms component which is ' +
        'proprietary. In the later versions of ASP.NET, ASP.NET MVC, ASP.NET Web API, and ASP.NET Web Pages (a platform using ' +
        'only Razor pages) will merge into a unified MVC 6.The project is called ASP.NET vNext.',

         content2: 'JavaScript (JS) is an interpreted computer programming language. It was originally implemented as ' +
        'part of web browsers so that client-side scripts could interact with the user, control the browser, communicate ' +
        'asynchronously, and alter the document content that was displayed.[5] More recently, however, it has become common in ' +
        'both game development and the creation of desktop applications.',

        }
        },
        methods:{

      onChange: function(e){
       var tabObj =  this.$refs.element.ej2Instances;
        var listObj =  this.$refs.headerStyles.ej2Instances;
        this.removeStyleClass();
        if (listObj.value === 'fill') {
            tabObj.element.classList.add('e-fill');
        } else if (listObj.value === 'background') {
            tabObj.element.classList.add('e-background');
        } else if (listObj.value === 'accent') {
            tabObj.element.classList.add('e-background');
            tabObj.element.classList.add('e-accent');
        }
    }

      removeStyleClass: function(e) {
        var tabObj =  this.$refs.element.ej2Instances;
        tabObj.element.classList.remove('e-fill');
        tabObj.element.classList.remove('e-background');
        tabObj.element.classList.remove('e-accent');
    }

        }
}
</script>
<style>
  @import "../../node_modules/@syncfusion/ej2-base/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-buttons/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-popups/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-navigations/styles/material.css";
</style>

Icon positions

You can customize the position of the Tab header icons using the iconPosition property. This property depends on the header items iconCss property. By default, Tab header icon is placed on left position. The position values are as follows:

  • Left: Icon is placed on the left of the Tab header item.
  • Right: Icon is placed on the right of the Tab header item.
  • Top: Icon is placed on the top of the Tab header item.
  • Bottom: Icon is placed on the bottom of the Tab header item.
Source
Preview
app.vue
<template>
<div id="wrapper" style='margin-top: 20px'>
   <div id='content' style="margin: 0px auto">
          <div id="default" style="padding-top:20px;width:250px">
            <div class='row'>
                <div>
                    <label> Icon Position </label>
                </div><br/>
                <div>
                    <ejs-dropdownlist ref='iconPosition' :dataSource='iconData' :change='onChange' :value='value' :fields='fields' :popupHeight='height'></ejs-dropdownlist>
                </div>
            </div>
        </div>
        <br/>
     <div>
    <div id="app">
    <ejs-tab id='element' ref="element">
        <e-tabitems>
                   <e-tabitem :header='headerText0' :content="content0"></e-tabitem>
                    <e-tabitem :header='headerText1' :content="content1"></e-tabitem>
                    <e-tabitem :header='headerText2' :content="content2"></e-tabitem>
      </e-tabitems>
    </ejs-tab>
  </div>
</div>
</div>
</div>
</template>
<script>
import Vue from 'vue';
import { TabPlugin } from '@syncfusion/ej2-vue-navigations';
import { DropDownListPlugin } from "@syncfusion/ej2-vue-dropdowns";
Vue.use(DropDownListPlugin);
Vue.use(TabPlugin);
export default {
  name: 'app',
   data: function(){
        return {
          iconData : [
        { Id: '1', position: 'left', text: 'Left' },
        { Id: '2', position: 'right', text: 'Right'},
        { Id: '3', position: 'top',text: 'Top' },
        { Id: '4', position: 'bottom', text: 'Bottom' }
        ],
      fields: { text: 'text', value: 'position' },
      height :'220px',
      value : 'left',

          headerText0: { 'text': 'Twitter', 'iconCss': 'e-twitter' },
          headerText1: { 'text': 'Facebook', 'iconCss': 'e-facebook' },
          headerText2: { 'text': 'WhatsApp', 'iconCss': 'e-whatsapp' },

        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.',

         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\'\s 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.',

         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.',

        }
   },
   methods:{
      onChange: function(e) {
        var tabObj =  this.$refs.element.ej2Instances;
        var listObj =  this.$refs.iconPosition.ej2Instances;
        console.log(tabObj);
        for(let i: number = 0; i < tabObj.items.length; i++) {
            tabObj.items[i].header.iconPosition = listObj.value;
        }
    }
}
}
</script>
<style>
  @import "../../node_modules/@syncfusion/ej2-base/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-buttons/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-popups/styles/material.css";
  @import "../../node_modules/@syncfusion/ej2-vue-navigations/styles/material.css";
</style>

See Also