JavaScript/jQuery HtmlEditor - variables

Configures variables, which are placeholders to be replaced with actual values when processing text.

Type:

Default Value: null

A user can insert variables in the text and remove them, but never modify them.

jQuery

JavaScript

$(function(){
    $("#htmlEditorContainer").dxHtmlEditor({
        toolbar: {
            // Adds a toolbar control that allows users to insert variables
            items: [ "variable" ]
        },
        variables: {
            dataSource: [ "FirstName", "LastName", "Company" ],
            escapeChar: [ "{", "}" ]
        }
    })
})

Angular

HTML

TypeScript

<dx-html-editor>
    <!-- Adds a toolbar control that allows users to insert variables -->
    <dxo-toolbar [items]="[ 'variable' ]"></dxo-toolbar>
    <dxo-variables
        [dataSource]="[ 'FirstName', 'LastName', 'Company' ]"
        [escapeChar]="[ '{', '}' ]">
    </dxo-variables>
</dx-html-editor>

import { DxHtmlEditorModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxHtmlEditorModule
    ],
    // ...
})

dataSource

Specifies a collection of variables available for a user.

Type:

String

|

Array<String>

|

DataSource

|

DataSource Configuration

Default Value: null

If you use DevExtreme ASP.NET MVC Controls, refer to the Data Binding article.

The following list shows how to specify the dataSource option depending on your data source:

Data Array
Assign the array to the dataSource option.
Read-Only Data in JSON Format
Set the dataSource option to the URL of a JSON file or service that returns JSON data.
OData
Implement an ODataStore.

Web API, PHP, MongoDB
Use one of the following extensions to enable the server to process data according to the protocol DevExtreme widgets use:

Then, use the createStore method to configure access to the server on the client as shown below. This method is part of DevExtreme.AspNet.Data.

jQuery

JavaScript

$(function() {
    let serviceUrl = "https://url/to/my/service";
    $("#htmlEditorContainer").dxHtmlEditor({
        // ...
        variables: {
            dataSource: DevExpress.data.AspNet.createStore({
                key: "ID",
                loadUrl: serviceUrl + "/GetAction"
            })
        }
    })
});

Angular

app.component.ts

app.component.html

app.module.ts

import { Component } from '@angular/core';
import CustomStore from 'devextreme/data/custom_store';
import { createStore } from 'devextreme-aspnet-data-nojquery';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    store: CustomStore;
    constructor() {
        let serviceUrl = "https://url/to/my/service";
        this.store = createStore({
            key: "ID",
            loadUrl: serviceUrl + "/GetAction"
        })
    }
}

<dx-html-editor ... >
    <dxo-variables [dataSource]="store"></dxo-variables>
</dx-html-editor>

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';

import { DxHtmlEditorModule } from 'devextreme-angular';

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        DxHtmlEditorModule
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule { }

Vue

App.vue

<template> 
    <dx-html-editor ... >
        <dx-variables :data-source="store"></dx-variables>
    </dx-html-editor>
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import CustomStore from 'devextreme/data/custom_store';
import { createStore } from 'devextreme-aspnet-data-nojquery';
import { DxHtmlEditor, DxVariables } from 'devextreme-vue/html-editor';

export default {
    components: {
        DxHtmlEditor,
        DxVariables
    },
    data() {
        const serviceUrl = "https://url/to/my/service";
        const store = createStore({
            key: "ID",
            loadUrl: serviceUrl + "/GetAction"
        });
        return {
            store
        }
    }
}
</script>

React

App.js

import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import CustomStore from 'devextreme/data/custom_store';
import { createStore } from 'devextreme-aspnet-data-nojquery';
import HtmlEditor, { Variables } from 'devextreme-react/html-editor';

const serviceUrl = "https://url/to/my/service";
const store = createStore({
    key: "ID",
    loadUrl: serviceUrl + "/GetAction"
});

class App extends React.Component {
    render() {
        return (
            <HtmlEditor ... >
                <Variables dataSource={store} />
            </HtmlEditor>
        );
    }
}
export default App;

Any other data source
Implement a CustomStore.

NOTE

The stores are immutable. You cannot change their configurations at runtime. Instead, create a new store or DataSource and assign it to the dataSource option as shown in the articles about changing options in jQuery, Angular, React, and Vue.

escapeChar

Specifies the special character(s) that should surround the variables.

Type:

String

|

Array<String>

Default Value: ''

jQuery

JavaScript

$(function(){
    $("#htmlEditorContainer").dxHtmlEditor({
        // ...
        variables: {
            dataSource: [ "FirstName" ],
            escapeChar: [ "{", "}" ] // {FirstName}
            // or
            // escapeChar: "##" // ##FirstName##
        }
    })
})

Angular

HTML

TypeScript

<dx-html-editor>
    <dxo-variables
        [dataSource]="[ 'FirstName' ]"
        [escapeChar]="[ '{', '}' ]"> <!-- {FirstName} -->
        <!-- or -->
        <!-- escapeChar="##"> --> <!-- ##FirstName## -->
    </dxo-variables>
</dx-html-editor>

import { DxHtmlEditorModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxHtmlEditorModule
    ],
    // ...
})