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Overview

The HtmlEditor component is a client-side WYSIWYG text editor. The editor allows users to format text and integrate media elements into documents. The result can be exported to HTML or Markdown.

Users can edit and customize content using the toolbar that can contain predefined and custom controls. To specify the available controls, use the items array. In this demo, the toolbar contains predefined controls.

Backend API
@section ExternalDependencies { <script src="https://unpkg.com/devextreme-quill@1.7.1/dist/dx-quill.min.js"></script> } @functions { object GetInputAttr(string key, string value) { return new { inputAttr = new Dictionary<string, string>() { { key, value } } }; } } @(Html.DevExtreme().HtmlEditor() .ID("html-editor") .Height(725) .ImageUpload(imageUpload => imageUpload.Tabs( tabs => { tabs.Add().Name(HtmlEditorImageUploadTab.File); tabs.Add().Name(HtmlEditorImageUploadTab.Url); }) ) .Value(new JS("markup")) .Toolbar(toolbar => toolbar.Items( items => { items.Add().Name(HtmlEditorToolbarItem.Undo); items.Add().Name(HtmlEditorToolbarItem.Redo); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add() .Name("size") .AcceptedValues(new[] { "8pt", "10pt", "12pt", "14pt", "18pt", "24pt", "36pt" }) .Option("options", GetInputAttr("aria-label", "Font size")); items.Add() .Name("font") .AcceptedValues(new[] { "Arial", "Courier New", "Georgia", "Impact", "Lucida Console", "Tahoma", "Times New Roman", "Verdana" }) .Option("options", GetInputAttr("aria-label", "Font family")); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.Bold); items.Add().Name(HtmlEditorToolbarItem.Italic); items.Add().Name(HtmlEditorToolbarItem.Strike); items.Add().Name(HtmlEditorToolbarItem.Underline); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.AlignLeft); items.Add().Name(HtmlEditorToolbarItem.AlignCenter); items.Add().Name(HtmlEditorToolbarItem.AlignRight); items.Add().Name(HtmlEditorToolbarItem.AlignJustify); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.OrderedList); items.Add().Name(HtmlEditorToolbarItem.BulletList); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add() .Name("header") .AcceptedValues(new JS("[false, 1, 2, 3, 4, 5]")) .Option("options", GetInputAttr("aria-label", "Header")); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.Color); items.Add().Name(HtmlEditorToolbarItem.Background); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.Link); items.Add().Name(HtmlEditorToolbarItem.Image); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.Clear); items.Add().Name(HtmlEditorToolbarItem.CodeBlock); items.Add().Name(HtmlEditorToolbarItem.Blockquote); items.Add().Name(HtmlEditorToolbarItem.Separator); items.Add().Name(HtmlEditorToolbarItem.InsertTable); items.Add().Name(HtmlEditorToolbarItem.DeleteTable); items.Add().Name(HtmlEditorToolbarItem.InsertRowAbove); items.Add().Name(HtmlEditorToolbarItem.InsertRowBelow); items.Add().Name(HtmlEditorToolbarItem.DeleteRow); items.Add().Name(HtmlEditorToolbarItem.InsertColumnLeft); items.Add().Name(HtmlEditorToolbarItem.InsertColumnRight); items.Add().Name(HtmlEditorToolbarItem.DeleteColumn); }) ) .MediaResizing(m => m.Enabled(true)) ) <div class="options"> <div class="caption">Options</div> <div class="option"> @(Html.DevExtreme().CheckBox() .Value(true) .Text("Multiline toolbar") .OnValueChanged("change_multiline") ) </div> <div class="option"> <div class="label">Image upload tabs:</div> @(Html.DevExtreme().SelectBox() .ID("html-editor-sb") .InputAttr("aria-label", "Tab") .DataSource(new JS("tabs")) .Value(new JS("tabs[2].Value")) .OnValueChanged("change_tabs") .ValueExpr("Value") .DisplayExpr("Name") ) </div> </div> <script> function change_multiline(e) { $("#html-editor") .dxHtmlEditor("instance") .option("toolbar.multiline", e.value.Value); } function change_tabs(e) { $("#html-editor") .dxHtmlEditor("instance") .option("imageUpload.tabs", e.value); } var tabs = [ { Name: 'From This Device', Value: ['file'] }, { Name: 'From the Web', Value: ['url'] }, { Name: 'Both', Value: ['file', 'url'] }, ]; var markup = ` <h2> <img src="../../Content/images/widgets/HtmlEditor.svg" alt="HtmlEditor" /> Formatted Text Editor (HTML Editor) </h2> <br> <p> DevExtreme JavaScript HTML Editor is a client-side WYSIWYG text editor that allows its users to format textual and visual content and store it as HTML or Markdown. </p> <p>Supported features:</p> <ul> <li> Inline formats: <ul> <li><strong>Bold</strong>, <em>italic</em>, <s>strikethrough</s> text formatting</li> <li>Font, size, color changes (HTML only)</li> </ul> </li> <li> Block formats: <ul> <li>Headers</li> <li>Text alignment</li> <li>Lists (ordered and unordered)</li> <li>Code blocks</li> <li>Quotes</li> </ul> </li> <li>Custom formats</li> <li>HTML and Markdown support</li> <li>Mail-merge placeholders (for example, %username%)</li> <li>Adaptive toolbar for working images, links, and color formats</li> <li>Image upload: drag-and-drop images onto the form, select files from the file system, or specify a URL.</li> <li>Copy-paste rich content (unsupported formats are removed)</li> <li>Tables support</li> </ul> <br> <p>Supported frameworks and libraries</p> <table> <tr> <td><strong>jQuery</strong></td> <td style="text-align: right;">v2.1 - v2.2 and v3.x</td> </tr> <tr> <td><strong>Angular</strong></td> <td style="text-align: right;">v7.0+</td> </tr> <tr> <td><strong>React</strong></td> <td style="text-align: right;">v16.2+</td> </tr> <tr> <td><strong>Vue</strong></td> <td style="text-align: right;">v2.6.3+</td> </tr> </table> `; </script>
using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Web.Mvc; using DevExtreme.MVC.Demos.Models.SampleData; namespace DevExtreme.MVC.Demos.Controllers { public class HtmlEditorController : Controller { public ActionResult Overview() { return View(); } } }
.dx-htmleditor-content img { vertical-align: middle; padding-right: 10px; } .dx-htmleditor-content table { width: 50%; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); margin-top: 20px; } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; display: inline-block; margin-right: 40px; } .option > .dx-selectbox, .option > .label { display: inline-block; vertical-align: middle; } .option > .label { margin-right: 10px; }

You can use the toolbar.multiline property to arrange the toolbar controls into multiple rows.

Users can resize media files when the mediaResizing is enabled. Currently, only images are supported.

To get started with the DevExtreme HtmlEditor component, refer to the following tutorial for step-by-step instructions: Getting Started with HtmlEditor.