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Scroll View

Scroll View


The ScrollView is a UI component that enables a user to scroll its content. This demo shows how to display the scrollbar within a container and how to update the ScrollView content.

Backend API
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window.onload = function () { let updateContentTimer; function updateContent(args, eventName) { const updateContentText = `<br /><div>Content has been updated on the ${eventName} event.</div><br />`; if (updateContentTimer) { clearTimeout(updateContentTimer); } updateContentTimer = setTimeout(() => { viewModel.content((eventName === 'PullDown' ? updateContentText + viewModel.content() : viewModel.content() + updateContentText)); args.component.release(); }, 500); } const updateBottomContent = function (e) { updateContent(e, 'ReachBottom'); }; const viewModel = { content: ko.observable(longText), updateTopContent(e) { updateContent(e, 'PullDown'); }, updateBottomContent: ko.observable(updateBottomContent), showScrollbarModes: [{ text: 'On Scroll', value: 'onScroll', }, { text: 'On Hover', value: 'onHover', }, { text: 'Always', value: 'always', }, { text: 'Never', value: 'never', }], showScrollbarMode: ko.observable('onScroll'), scrollByContentValue: ko.observable(true), scrollByThumbValue: ko.observable(true), reachBottomValue: ko.observable(true), pullDownValue: ko.observable(false), }; viewModel.reachBottomValue.subscribe((value) => { if (value) { viewModel.updateBottomContent(updateBottomContent); } else { viewModel.updateBottomContent(null); } }); ko.applyBindings(viewModel, document.getElementById('container')); };
<!DOCTYPE html> <html xmlns=""> <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" /> <script src=""></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <script src=""></script> <link rel="stylesheet" type="text/css" href="" /> <script src=""></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 id="scrollview-demo"> <div id="scrollview" data-bind="dxScrollView: { bounceEnabled: pullDownValue, scrollByContent: true, scrollByThumb: true, showScrollbar: showScrollbarMode, scrollByContent: scrollByContentValue, scrollByThumb: scrollByThumbValue, onPullDown: updateTopContent, onReachBottom: updateBottomContent, reachBottomText: 'Updating...' }"> <div data-bind="html: content"></div> </div> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Show scrollbar:</span> <div id="show-scrollbar-mode" data-bind="dxSelectBox: { items: showScrollbarModes, value: showScrollbarMode, valueExpr: 'value', displayExpr: 'text' }"></div> </div> <div class="option"> <div id="use-reach-bottom" data-bind="dxCheckBox: { value: reachBottomValue, text: 'Update content on the ReachBottom event' }"></div> </div> <div class="option"> <div id="use-pull-down-bottom" data-bind="dxCheckBox: { value: pullDownValue, text: 'Update content on the PullDown event' }"></div> </div> <div class="option"> <div id="scroll-by-content" data-bind="dxCheckBox: { value: scrollByContentValue, text: 'Scroll by content' }"></div> </div> <div class="option"> <div id="scroll-by-thumb" data-bind="dxCheckBox: { value: scrollByThumbValue, text: 'Scroll by thumb' }"></div> </div> </div> </div> </div> </body> </html>
#scrollview-demo { min-height: 550px; } #scrollview { height: auto; position: absolute; top: 0; bottom: 300px; padding: 20px; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: absolute; bottom: 0; left: 0; right: 0; } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; } .option > span { position: relative; top: 2px; margin-right: 10px; } .option > .dx-selectbox { display: inline-block; vertical-align: middle; max-width: 340px; width: 100%; }
let longText = ''; for (let i = 0; i < 10; i += 1) { longText += '<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>'; } longText += '<br />';