DevExtreme Accessibility Compliance
DevExtreme component libraries meet a variety of WCAG and Section 508 compliance standards. To assess this demo’s accessibility level, click the Run AXE® Validation button to launch the AXE® web accessibility evaluation tool.
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The overall accessibility level of your application depends on the HtmlEditor features used.
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Backend API
$(() => {
const editor = $('.html-editor').dxHtmlEditor({
height: 725,
value: markup,
imageUpload: {
tabs: ['file', 'url'],
fileUploadMode: 'base64',
},
toolbar: {
items: [
'undo', 'redo', 'separator',
{
name: 'size',
acceptedValues: ['8pt', '10pt', '12pt', '14pt', '18pt', '24pt', '36pt'],
options: { inputAttr: { 'aria-label': 'Font size' } },
},
{
name: 'font',
acceptedValues: ['Arial', 'Courier New', 'Georgia', 'Impact', 'Lucida Console', 'Tahoma', 'Times New Roman', 'Verdana'],
options: { inputAttr: { 'aria-label': 'Font family' } },
},
'separator', 'bold', 'italic', 'strike', 'underline', 'separator',
'alignLeft', 'alignCenter', 'alignRight', 'alignJustify', 'separator',
'orderedList', 'bulletList', 'separator',
{
name: 'header',
acceptedValues: [false, 1, 2, 3, 4, 5],
options: { inputAttr: { 'aria-label': 'Header' } },
}, 'separator',
'color', 'background', 'separator',
'link', 'image', 'separator',
'clear', 'codeBlock', 'blockquote', 'separator',
'insertTable', 'deleteTable',
'insertRowAbove', 'insertRowBelow', 'deleteRow',
'insertColumnLeft', 'insertColumnRight', 'deleteColumn',
],
},
mediaResizing: {
enabled: true,
},
}).dxHtmlEditor('instance');
$('#multiline').dxCheckBox({
text: 'Multiline toolbar',
value: true,
onValueChanged(e) {
editor.option('toolbar.multiline', e.value);
},
});
$('#image-uploader-tabs').dxSelectBox({
items: tabs,
value: tabs[2].value,
inputAttr: { 'aria-label': 'Tab' },
valueExpr: 'value',
displayExpr: 'name',
onValueChanged: (e) => {
editor.option('imageUpload.tabs', e.value);
},
});
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<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=5.0" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.6/css/dx.light.css" />
<script src="https://unpkg.com/devextreme-quill@1.7.1/dist/dx-quill.min.js"></script>
<script src="js/dx.all.js"></script>
<script src="data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div class="html-editor"></div>
<div class="options">
<div class="caption">Options</div>
<div class="option">
<div id="multiline"></div>
</div>
<div class="option">
<div class="label">Image upload tabs:</div>
<div id="image-uploader-tabs"></div>
</div>
</div>
</div>
</body>
</html>
.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;
}
const tabs = [{ name: 'From This Device', value: ['file'] }, { name: 'From the Web', value: ['url'] }, { name: 'Both', value: ['file', 'url'] }];
const markup = `
<h2>
<img src="../../../../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>
`;
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 JavaScript HtmlEditor component, refer to the following tutorial for step-by-step instructions: Getting Started with JavaScript HtmlEditor.