Tag Count Limitation
Documentation
You can use the maxDisplayedTags option to limit the number of displayed tags. When the specified limit is exceeded, the tags are combined into a single multi-tag that displays the number of selected items. Use the showMultiTagOnly option to specify whether to display a multi-tag only or other tags as well. You can also use onMultiTagPreparing event handler to customize the multi-tag, as shown in the second example.
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import React from 'react';
import { TagBox } from 'devextreme-react/tag-box';
import { products } from './data.js';
class App extends React.Component {
constructor() {
super();
this.items = products.slice(0, 5);
this.onMultiTagPreparing = this.onMultiTagPreparing.bind(this);
}
onMultiTagPreparing(args) {
const selectedItemsLength = args.selectedItems.length;
const totalCount = 5;
if(selectedItemsLength < totalCount) {
args.cancel = true;
} else {
args.text = `All selected (${ selectedItemsLength })`;
}
}
render() {
return (
<div>
<div className={'dx-fieldset'}>
<div className={'dx-field'}>
<div className={'dx-field-label'}>Multi-tag for several items</div>
<div className={'dx-field-value'}>
<TagBox
items={products}
defaultValue={[1, 2, 3, 4]}
showSelectionControls={true}
maxDisplayedTags={3}
displayExpr={'Name'}
valueExpr={'ID'}
selectAllMode={'allPages'}
/>
</div>
</div>
<div className={'dx-field'}>
<div className={'dx-field-label'}>Multi-tag for all items</div>
<div className={'dx-field-value'}>
<TagBox
items={this.items}
defaultValue={[1, 2, 3, 4, 5]}
showSelectionControls={true}
maxDisplayedTags={3}
displayExpr={'Name'}
valueExpr={'ID'}
onMultiTagPreparing={this.onMultiTagPreparing} />
</div>
</div>
<div className={'dx-field'}>
<div className={'dx-field-label'}>Multi-tag with ordinary tags</div>
<div className={'dx-field-value'}>
<TagBox
items={products}
defaultValue={[1, 2, 3, 4, 5, 6, 7]}
showSelectionControls={true}
maxDisplayedTags={2}
showMultiTagOnly={false}
displayExpr={'Name'}
valueExpr={'ID'}
selectAllMode={'allPages'} />
</div>
</div>
</div>
</div>
);
}
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app')
);
<!DOCTYPE html>
<html>
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.5/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
.dx-field {
margin-bottom: 50px;
}
export const products = [{
ID: 1,
Name: 'HD Video Player',
Price: 330,
Current_Inventory: 225,
Backorder: 0,
Manufacturing: 10,
Category: 'Video Players',
ImageSrc: 'images/products/1.png'
}, {
ID: 2,
Name: 'SuperHD Video Player',
Price: 400,
Current_Inventory: 150,
Backorder: 0,
Manufacturing: 25,
Category: 'Video Players',
ImageSrc: 'images/products/2.png'
}, {
ID: 3,
Name: 'SuperPlasma 50',
Price: 2400,
Current_Inventory: 0,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: 'images/products/3.png'
}, {
ID: 4,
Name: 'SuperLED 50',
Price: 1600,
Current_Inventory: 77,
Backorder: 0,
Manufacturing: 55,
Category: 'Televisions',
ImageSrc: 'images/products/4.png'
}, {
ID: 5,
Name: 'SuperLED 42',
Price: 1450,
Current_Inventory: 445,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: 'images/products/5.png'
}, {
ID: 6,
Name: 'SuperLCD 55',
Price: 1350,
Current_Inventory: 345,
Backorder: 0,
Manufacturing: 5,
Category: 'Televisions',
ImageSrc: 'images/products/6.png'
}, {
ID: 7,
Name: 'SuperLCD 42',
Price: 1200,
Current_Inventory: 210,
Backorder: 0,
Manufacturing: 20,
Category: 'Televisions',
ImageSrc: 'images/products/7.png'
}, {
ID: 8,
Name: 'SuperPlasma 65',
Price: 3500,
Current_Inventory: 0,
Backorder: 0,
Manufacturing: 0,
Category: 'Televisions',
ImageSrc: 'images/products/8.png'
}, {
ID: 9,
Name: 'SuperLCD 70',
Price: 4000,
Current_Inventory: 95,
Backorder: 0,
Manufacturing: 5,
Category: 'Televisions',
ImageSrc: 'images/products/9.png'
}, {
ID: 10,
Name: 'DesktopLED 21',
Price: 175,
Current_Inventory: null,
Backorder: 425,
Manufacturing: 75,
Category: 'Monitors',
ImageSrc: 'images/products/10.png'
}, {
ID: 12,
Name: 'DesktopLCD 21',
Price: 170,
Current_Inventory: 210,
Backorder: 0,
Manufacturing: 60,
Category: 'Monitors',
ImageSrc: 'images/products/12.png'
}, {
ID: 13,
Name: 'DesktopLCD 19',
Price: 160,
Current_Inventory: 150,
Backorder: 0,
Manufacturing: 210,
Category: 'Monitors',
ImageSrc: 'images/products/13.png'
}, {
ID: 14,
Name: 'Projector Plus',
Price: 550,
Current_Inventory: null,
Backorder: 55,
Manufacturing: 10,
Category: 'Projectors',
ImageSrc: 'images/products/14.png'
}, {
ID: 15,
Name: 'Projector PlusHD',
Price: 750,
Current_Inventory: 110,
Backorder: 0,
Manufacturing: 90,
Category: 'Projectors',
ImageSrc: 'images/products/15.png'
}, {
ID: 16,
Name: 'Projector PlusHT',
Price: 1050,
Current_Inventory: 0,
Backorder: 75,
Manufacturing: 57,
Category: 'Projectors',
ImageSrc: 'images/products/16.png'
}, {
ID: 17,
Name: 'ExcelRemote IR',
Price: 150,
Current_Inventory: 650,
Backorder: 0,
Manufacturing: 190,
Category: 'Automation',
ImageSrc: 'images/products/17.png'
}, {
ID: 18,
Name: 'ExcelRemote Bluetooth',
Price: 180,
Current_Inventory: 310,
Backorder: 0,
Manufacturing: 0,
Category: 'Automation',
ImageSrc: 'images/products/18.png'
}, {
ID: 19,
Name: 'ExcelRemote IP',
Price: 200,
Current_Inventory: 0,
Backorder: 325,
Manufacturing: 225,
Category: 'Automation',
ImageSrc: 'images/products/19.png'
}];
System.config({
transpiler: 'plugin-babel',
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16/umd/react.development.js',
'react-dom': 'npm:react-dom@16/umd/react-dom.development.js',
'prop-types': 'npm:prop-types/prop-types.js',
'devextreme': 'npm:devextreme@19.1',
'devextreme-react': 'npm:devextreme-react@19.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.6/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js',
'systemjs-babel-build':
'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});