Last active
March 31, 2017 18:54
Star
You must be signed in to star a gist
ADA compliant Expandable Content Component for Knockout
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
.expandable-content-collapsed .expandable-content-wrapper { | |
display: none; | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
(function (global) { | |
if(!global.ko) { | |
return; | |
} | |
var template = | |
'<div class="expandable-content-component" aria-live="polite" data-bind="css: { \'expandable-content-expanded\': isExpanded(), \'expandable-content-collapsed\': !isExpanded() }, attr: {id: id}" >' + | |
'<!--ko if: labelType === "button" -->' + | |
' <button type="button" data-bind="attr: {class: \'expandable-content-label \' + labelClassName, \'aria-expanded\': isExpanded().toString(), \'aria-controls\': wrapperId}, text: labelText, click: toggleExpand"></button>' + | |
'<!-- /ko -->' + | |
'<!--ko ifnot: labelType === "button" -->' + | |
'<a href="#" data-bind="attr: {class: labelClassName, \'aria-expanded\': isExpanded().toString(), \'aria-controls\': wrapperId}, text: labelText, click: toggleExpand"></a>' + | |
'<!-- /ko -->' + | |
' <div class="expandable-content-wrapper" role="region" data-bind="attr: {id: wrapperId, \'aria-hidden\': (!isExpanded()).toString()}">' + | |
' <!-- ko template: { nodes: $componentTemplateNodes, data: $parent } --><!-- /ko -->' + | |
' </div>' + | |
'</div>'; | |
function generateUniqueId(prefix) { | |
var id = prefix + '_' + (new Date()).getTime(); | |
if (document.getElementById(id)) { | |
return generateUniqueId(prefix); | |
} | |
return id; | |
} | |
function ComponentViewModel(params) { | |
var self = this; | |
var expanded = params.isExpanded || false; | |
if (!ko.isObservable(expanded)) { | |
expanded = ko.observable(expanded); | |
} | |
if (!(params.text || params.labelText)) { | |
throw (new Error('Expandable Content Component requires a text parameter.')); | |
} | |
self.id = params.id || generateUniqueId('expandable_content_component'); | |
self.wrapperId = params.wrapperId || generateUniqueId('expandable_content_wrapper'); | |
self.labelType = params.labelType || 'button'; | |
self.labelText = params.text || params.labelText; | |
self.labelClassName = params.labelClassName; | |
self.isExpanded = expanded; | |
self.toggleExpand = function () { | |
self.isExpanded(!self.isExpanded()); | |
} | |
} | |
ko.components.register('expandable-content', { | |
viewModel: ComponentViewModel, | |
template: template | |
}); | |
})(window); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<h1>Expandable Content Component</h1> | |
<expandable-content params="labelText: 'Expand Content', labelClassName: 'button', labelType: 'anchor'"> | |
<h2>Ordered List</h2> | |
<ol> | |
<li>List Item 1</li> | |
<li>List Item 2</li> | |
<li>List Item 3</li> | |
<li data-bind="text: something"></li> | |
</ol> | |
<h2>Unordered List</h2> | |
<ul data-bind="foreach: {data: listItems, as: 'item'}"> | |
<li data-bind="text: item"></li> | |
</ul> | |
</expandable-content> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment