JarCastingangular-vs-repeat v2.0.9
Looking for a version for Angular 2?
Check out https://github.com/kamilkp/ng2-vs-for
Breaking changes in v2.x
- API changes for passing options. Options are now passed as an object to the
vs-repeatattribute instead of using separate attributes for each option (except forvs-repeat-container)
Major changes in v1.0.0-beta.0
- elements are no longer absolutely positioned
- no need for a mousewheel helper dummy element on MacOS (to preserve inertia scrolling)
- no need for
topupdating directives - even better performance
Virtual Scroll for AngularJS ngRepeat directive
Demo: http://kamilkp.github.io/angular-vs-repeat/
You can find the source code for this demo on branch "gh-pages".
Changelog: https://github.com/kamilkp/angular-vs-repeat/blob/master/CHANGELOG.md
DESCRIPTION:
vsRepeat directive stands for Virtual Scroll Repeat. It turns a standard ngRepeated set of elements in a scrollable container into a component, where the user thinks he has all the elements rendered and all he needs to do is scroll (without any kind of pagination - which most users loath) and at the same time the browser isn't overloaded by that many elements/angular bindings etc. The directive renders only so many elements that can fit into current container's clientHeight/clientWidth.
LIMITATIONS:
- current version only supports an Array as a right-hand-side object for
ngRepeat - all rendered elements must have the same height/width or the sizes of the elements must be known up front
USAGE:
First include vs-repeat as a module dependency in your app. In order to use the vsRepeat directive you need to place a vs-repeat attribute on a direct parent of an element with ng-repeat example:
<div vs-repeat="options">
<div ng-repeat="item in someArray">
<!-- content -->
</div>
</div>
or:
<div vs-repeat="options">
<div ng-repeat-start="item in someArray">
<!-- content -->
</div>
<div>
<!-- something in the middle -->
</div>
<div ng-repeat-end>
<!-- content -->
</div>
</div>
You can also measure the single element's height/width (including all paddings and margins), and then speficy it as a value of the options' size property. This can be used if one wants to override the automatically computed element size. example:
<div vs-repeat="{size: 50}"> <!-- the specified element height is 50px -->
<div ng-repeat="item in someArray">
<!-- content -->
</div>
</div>
- the vsRepeat directive must be applied to a direct parent of an element with
ngRepeat - the library also supports ng-repeat-start/ng-repeat-end syntax
- the value of vsRepeat attribute is the single element's height/width measured in pixels. If none provided, the directive will compute it automatically
OPTIONAL PARAMETERS (attributes):
- vs-repeat-container="selector" - selector for element containing ng-repeat. (defaults to the current element)
OPTIONS:
Options shall be passed as an object to the vs-repeat attribute e.g.:
<div vs-repeat="{scrollParent: 'window', size: 20}"></div>
Available options:
-
horizontal- boolean; stack repeated elements horizontally instead of vertically (defaults to false) -
offset-before- top/left offset in pixels (defaults to 0) -
offset-after- bottom/right offset in pixels (defaults to 0) -
scroll-margin- how many pixels ahead should elements be rendered while scrolling (defaults to 0) -
latch- if true, elements will be rendered gradually but won't be removed when scrolled away (defaults to false) -
size- an angular expression evaluating to the element's size (in pixels) - it is possible to use the ngRepeat's local repeaing variable in this expression -
autoresize- use this attribute without vs-size and without specifying element's size. The automatically computed element style will readjust upon window resize if the size is dependable on the viewport size -
scrolled-to-end- callback will be called when the last item of the list is rendered -
scrolled-to-end-offset- set this number to trigger the scrolledToEnd callback n items before the last gets rendered -
scrolled-to-beginning- callback will be called when the first item of the list is rendered -
scrolled-to-beginning-offset- set this number to trigger the scrolledToBeginning callback n items before the first gets rendered
EVENTS:
vsRepeatTrigger- an event the directive listens for to manually trigger reinitializationvsRepeatResize- an event the directive listens for to manually trigger the autosizing algorithmvsRepeatReinitialized- an event the directive emits upon reinitialization done; the listener may accepts three arguments:event,startIndexandendIndex