Client-Side Data Processing
Documentation
The DevExtreme JavaScript UI components can get data from a remote storage and process it on the client. This demo shows the Chart component whose data source loads all data from a remote JSON file in one query. Afterwards, different filters are applied to this data depending on a value of the drop-down menu under the chart.
weatherbase.com
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<template>
<div id="chart-demo">
<DxChart
:data-source="monthWeather"
:customize-point="customizePoint"
title="Temperature in Barcelona: January 2012"
>
<DxSize :height="420"/>
<DxValueAxis>
<DxLabel
:customize-text="customizeLabelText"
:visible="true"
/>
</DxValueAxis>
<DxSeries
argument-field="day"
value-field="t"
type="bar"
/>
<DxLegend :visible="false"/>
<DxExport :enabled="true"/>
<DxLoadingIndicator :enabled="true"/>
</DxChart>
<div class="action">
<DxSelectBox
id="choose-temperature"
:data-source="temperature"
:width="70"
:value="6"
:on-value-changed="changeTemperature"
/>
<div class="label">Choose a temperature threshold, °C:
</div>
</div>
</div>
</template>
<script>
import DxChart, {
DxValueAxis,
DxLabel,
DxLegend,
DxExport,
DxSeries,
DxSize,
DxLoadingIndicator
} from 'devextreme-vue/chart';
import DxSelectBox from 'devextreme-vue/select-box';
import DataSource from 'devextreme/data/data_source';
import CustomStore from 'devextreme/data/custom_store';
const palette = ['#c3a2cc', '#b7b5e0', '#e48cba'];
export default {
components: {
DxChart,
DxValueAxis,
DxLabel,
DxLegend,
DxExport,
DxLoadingIndicator,
DxSeries,
DxSize,
DxSelectBox
},
data() {
let paletteIndex = 0;
const monthWeather = new DataSource({
store: new CustomStore({
load: () => {
return fetch('../../../../data/monthWeather.json')
.then(e => e.json())
.catch(() => { throw 'Data Loading Error'; });
},
loadMode: 'raw'
}),
filter: ['t', '>', '6'],
paginate: false
});
return {
temperature: [6, 7, 8, 9, 10, 11, 12],
monthWeather,
paletteIndex
};
},
methods: {
changeTemperature({ value }) {
this.monthWeather.filter(['t', '>', value]);
this.monthWeather.load();
},
customizeLabelText({ valueText }) {
return `${valueText}${'°C'}`;
},
customizePoint() {
const color = palette[this.paletteIndex];
this.paletteIndex = this.paletteIndex === 2 ? 0 : this.paletteIndex + 1;
return { color };
},
}
};
</script>
<style>
#choose-temperature {
float: right;
}
.action {
width: 320px;
margin-top: 20px;
}
.label {
padding-top: 9px;
}
</style>
import { createApp } from 'vue';
import App from './App.vue';
createApp(App).mount('#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/21.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.4/css/dx.light.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>
window.config = {
transpiler: 'plugin-babel',
meta: {
'*.vue': {
loader: 'vue-loader'
},
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js',
'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js',
'mitt': 'npm:mitt/dist/mitt.umd.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.27.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@21.1.4/cjs',
'devextreme-vue': 'npm:devextreme-vue@21.1.4',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.1.4/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.19/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.1.42/dist/dx-gantt.js',
'@devextreme/vdom': 'npm:@devextreme/vdom@1.2.2',
'inferno': 'npm:inferno@7.4.8/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.8/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.8/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.8/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.8/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.8/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.8/dist/inferno-extras.min.js',
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme-vue': {
main: 'index.js'
},
'devextreme': {
defaultExtension: 'js'
},
'@devextreme/vdom': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@devextreme/*/package.json",
],
babelOptions: {
sourceMaps: false,
stage0: true
}
};
System.config(window.config);
[
{ "day": "1", "t": 13.1 },
{ "day": "2", "t": 13.2 },
{ "day": "3", "t": 10.5 },
{ "day": "4", "t": 10.6 },
{ "day": "5", "t": 11.9 },
{ "day": "6", "t": 14.3 },
{ "day": "7", "t": 9.6 },
{ "day": "8", "t": 9.5 },
{ "day": "9", "t": 9.4 },
{ "day": "10", "t": 8.8 },
{ "day": "11", "t": 8.7 },
{ "day": "12", "t": 8.8 },
{ "day": "13", "t": 7.5 },
{ "day": "14", "t": 6.4 },
{ "day": "15", "t": 8.8 },
{ "day": "16", "t": 9.6 },
{ "day": "17", "t": 11.6 },
{ "day": "18", "t": 8.9 },
{ "day": "19", "t": 8.8 },
{ "day": "20", "t": 10.8 },
{ "day": "21", "t": 11.4 },
{ "day": "22", "t": 11.6 },
{ "day": "23", "t": 11.4 },
{ "day": "24", "t": 10.6 },
{ "day": "25", "t": 9.6 },
{ "day": "26", "t": 9.6 },
{ "day": "27", "t": 10.9 },
{ "day": "28", "t": 9.8 },
{ "day": "29", "t": 7.2 },
{ "day": "30", "t": 7.2 },
{ "day": "31", "t": 7.6 }
]