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Compatibility with Essential JS 1 JavaScript

This article provides a step-by-step introduction to configure the Essential JS 1 and Essential JS 2 JavaScript controls in a same web page.


To work with the Essential JS 1 and the Essential JS 2 controls compatibility in JavaScript, the below mentioned System requirements are necessary,

Creating JavaScript application with Essential JS 2 control

  1. You can create a JavaScript application with the help of the given Essential JS 2 Getting Started Documentation.
  2. Now the Essential JS 2 Button control rendered successfully in the web page.

Adding Essential JS 1 control in the JavaScript application

  1. Install the Essential JS 1 npm package with required dependent typing package in the JavaScript quick start application.

    npm install syncfusion-javascript @types/ej.web.all @types/jquery

    ej1 npm package install

  2. Add the necessary Essential JS 1 scripts in the <head> element and add the HTML Button element inside <body> element in the ~/src/index.html for rendering Essential JS 1 Button control.

        <script src="../node_modules/jquery/dist/jquery.min.js" type="text/javascript"></script>
        <script src="../node_modules/syncfusion-javascript/Scripts/ej/web/ej.web.all.min.js" type="text/javascript"></script>
        <div style="margin: 50px;">
            <h2>Essential JS 1 Button</h2>
            <!--Essential JS 1 button-->
            <button id="button">Button</button>

    Refer to this documentation to know more about Essential JS 1 dependencies.

  3. After adding the HTML Button element, Add the Essential JS 1 compatibility style references in the styles.css file.

    The compatibility styles of Essential JS 1 and Essential JS 2 must be added in the application to prevent the UI conflicts between the Essential JS 1 and Essential JS 2 controls.

    Replace the style.css file content with the below style references.

    @import '../../node_modules/@syncfusion/ej2/styles/compatibility/material.css';
    @import '../../node_modules/syncfusion-javascript/Content/ej/web/material/ej.web.all.compatibility.min';
  4. Add the Essential JS 1 type reference to the types compiler options in ~/tsconfig.json file.

        "compilerOptions": {
            "types": ["ej.web.all"]
  5. Now, add the Essential JS 1 Definitely Typed references and create the Essential JS 1 Button control in the ~/src/app/app.ts file.

    * Essential JS 1 Button
    /// <reference path="jquery.d.ts">
    /// <reference path="ej.web.all.d.ts">
    module ButtonComponent {
        $(function () {
            var sample = new ej.Button($("#button"));
  6. Finally, run the below command line and it will open the web application in the web browser.

    npm start

    The Essential JS 1 and Essential JS 2 Button control will be rendered in the same web page.

    ej1 and ej2 button