mediawiki-skins-Vector/resources/skins.vector.styles/SearchBoxLoader.less
Jan Drewniak 1dad545f63 Adds loading indicator for new search module
Provides a loading indicator to show while the new Vue.js based
search widget loads. Given that the new widget will pull down the
entire Vue.js runtime, it's likely that there will be a delay
before the search suggestions appear. This loader is meant to
improve the perceived loading experience of the new widget.

Adds:
- New searchLoader.js file containing loading behaviour.
  - This overrides the code searchSuggest loading behaviour.
- New SearchBoxLoader.less file containing the loader styles.
- i18n message: 'vector-search-loader'.
- The Event type to jsdoc.json

Bug: T254695
Change-Id: I6b5f0a60018954e10b9e80792030b67b2ec33e5a
2020-09-08 13:59:41 +00:00

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2.1 KiB
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/**
* Loading indicator for search widget
*
* By adding a class on the parent search form
* <div id="simpleSearch" class="search-form__loader"></div>
* A pseudo element is added via ':after' that mimics the appearance
* of the search suggestion and contains the text
* "Loading search suggestions" (message key: vector-search-loader).
*
* After appearing for more than a second, a progress-bar animation appears
* above the loading indicator.
*
**/
#simpleSearch.search-form__loader:after {
// Set the i18n message.
content: attr( data-loading-msg );
//
// Position loader below the input.
display: block;
position: absolute;
//
// IE9-11 have some issues, but not with this basic use-case.
top: 100%;
width: 100%;
//
// Ensure it doesn't extend beyond the input.
box-sizing: border-box;
//
// Align loader style with input.
border: @border-base;
border-top-width: 0; // Hide the top border so it doesn't interfere with focus state.
border-radius: 0 0 @border-radius-base @border-radius-base;
color: @color-base--disabled;
font-size: @font-size-notification;
padding: 0.4em;
.box-shadow( @boxShadowWidget );
//
// Hide text in case it extends beyond the input.
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
//
// Add a progress-bar to the loading indicator,
// but only show it animating after 1 second of loading.
background: /*image*/ linear-gradient( 90deg, @colorProgressive 0%, @colorProgressive 100% )
/* position / size*/ -10% 0 ~'/' 0 2px
/* repeat */ no-repeat,/*second bg, just color*/#fff;
//
// Animates the progress-bar.
animation: /* name */ search-loader-progress-bar
/* duration */ 1200ms
/* timing function */ linear
/* delay */ 1000ms
/* iteration count */ infinite
/* fill direction */ alternate;
}
@keyframes search-loader-progress-bar {
0% {
background-size: 0 2px;
background-position: -10% 0;
}
30% {
background-size: 30% 2px;
background-position: -10% 0;
}
70% {
background-size: 30% 2px;
background-position: 110% 0;
}
100% {
background-size: 0 2px;
background-position: 110% 0;
}
}