@nuclei-components/page-sections
v0.6.2
Published
A simple section solution for your single page or landing page. Vanilla js, no framework dependencies, small footprint.
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Page-Sections
A simple section solution for your single page or landing page. Vanilla js, no framework dependencies, small footprint. You can easily specify the sections within the container element to be full screen or define a max width. Additionally functionality makes it easy to navigate the sections conveniently.
Demo
Installation
npm install --save page-sections
As the support for web components is currently still pretty spotty, you probably want to load a polyfill before loading the web component.
I recommend the webcomponentsjs. To make sure the webcomponent is only loaded once the polyfill is done (when using the webcomponents-loader.js
) you will want to wait for the WebComponentsReady
event before loading the web component. This event is always fired, even in browser that fully support web components.
<script type="text/javascript" async>
window.addEventListener('WebComponentsReady', function () {
let script = document.createElement('script')
script.setAttribute('src', '../dist/page-sections.js')
document.head.appendChild(script)
})
</script>
Usage
Add one or multiple <page-sections></page-sections>
elements to your page. Within you can add as many <page-section></page-section>
elements, as you want.
<page-sections>
<page-section class="anyClass">
<div class="red">Your red copy.</div>
</page-section>
<page-section>
<div class="truth">Web components are awesome.</div>
</page-section>
<div class="blue">Divs will be ignored</div>
<page-section>
<div class="wow">This is so simple.</div>
</page-section>
</page-sections>
The page-section
element is a flexbox container with a flex-direction: column
. If you want to have items side by side you should add a wrapping container around those items.
<page-section>
<div class="grid">
<div class="column-5">Column 1</div>
<div class="column-5">Column 2</div>
</div>
</page-section>
Attributes
<page-section>
requiredVisible
The requiredVisible
attribute is a value between 0
and 1
representing the percentage that is required to be within the viewport for a page-section to be considered visible
. If not set it will default to 0.6
.
centered
The centered
attribute makes the content of a page-section
horizontally and vertically centered. The centering is flexbox
based so you can overwrite this behaviour if you only want the content to be centered in one direction.
fullscreen
If the fullscreen
attribute is set on a page-section
, it fills at least the entire height of the viewport (min-height: 100vh
).
maxwidth
This attribute makes the content of a page-section
not extend past the specified max-width
. Any value that works for max-width
will be accepted.
minwidth
This attribute makes the content of a page-section
extend at least to the specified min-width
. Any value that works for min-width
will be accepted.
width
This attribute makes the content of a page-section
have a specified width
. Any value that works for width
will be accepted.
active
When the page-section
is in view according to the requiredVisible
attribute the active
attribute will be added to the page-section
element. Once it is not in view anymore it will be removed again.
activated
Once the page-section
has been in view once, the activated
attribute is added to the page-section
element.
Methods
<page-sections>
container
next
When evoked, the next
method moves the section that follows the currently active section within the selected <page-sections>
element into view.
This method uses the scrollIntoView
function with a smooth
behaviour which defaults to instant
if not supported.
let sections = document.querySelector('page-sections')
sections.next() // moves to the next section
previous
When evoked, the previous
method moves the section that is above the currently active section within the selected <page-sections>
element into view.
This method uses the scrollIntoView
function with a smooth
behaviour which defaults to instant
if not supported.
let sections = document.querySelector('page-sections')
sections.previous() // moves to the previous section
goTo
When evoked, the goTo
method moves the section with the specified name
attribute within the selected <page-sections>
element into view. Thus the goTo
method only works for sections that have a name
attribute set on them.
This method uses the scrollIntoView
function with a smooth
behaviour which defaults to instant
if not supported.
let sections = document.querySelector('page-sections')
sections.goTo('sectionName') // moves to the <page-section name="sectionName">
Events
<page-section>
activated
The activated
event is fired when the page-section
is in view according to the requiredVisible
attribute.
deactivated
The deactivated
event is fired when the page-section
leaves the view according to the requiredVisible
attribute.
<page-sections>
container
activated
The activated
event is fired when the page-sections
container is partly visible.
deactivated
The deactivated
event is fired when the page-sections
container has completely left the viewport.
activateSection
The activateSection
event is fired when a page-section
inside the page-sections
container is set to active.
The event details event.detail
are:
section
, the activated sectionsectionName
, the name attributes value of the section (if any)sectionIndex
, the index (starting from 1) of the active section within the current sections container. This only takes into account otherpage-section
elements.
deactivateSection
The deactivateSection
event is fired when the active state of a page-section
inside the page-sections
container is removed.
The event details event.detail
are:
section
, the activated sectionsectionName
, the name attributes value of the section (if any)sectionIndex
, the index (starting from 1) of the active section within the current sections container. This only takes into account otherpage-section
elements.
Available CSS Custom Properties
The page-section
has an inner element to allow your content to be centered.
<page-section>
<!-- Shadow -->
<div id="content">
<slot><!-- Your content is added here --></slot>
</div>
<!-- Shadow -->
</page-section>
In some cases it might be necessary to define a height or width for this element. To this end you have the following css custom properties available.
width: var(--page-section-width, auto);
height: var(--page-section-height, auto);
min-width: var(--page-section-min-width, auto);
min-height: var(--page-section-min-height, auto);
max-width: var(--page-section-max-width, auto);
max-height: var(--page-section-max-height, auto);
If you wanted your element to be at least 400px
wide, you could do the following:
<style media="screen">
.min-400{
--page-section-min-width: 400px;
}
</style>
<page-section class="min-400">
Your content.
</page-section>