I have got a number of components/windows (divs) on my html page; each div meant to show a large amount of data. Am trying to use nginfinite-scroll (http://binarymuse.github.io/ngInfiniteScroll/documentation.html) on each of these components so that infinite scrolling happens inside each of them. But looks like the infinite-scrolling is triggered only when an element on which the nginfinite-scroll is called nears the end of the browser-window. But i can't have my components move. How do i get infinite scroll happen in-place, i mean inside each component/element whose position would not near the browser end? Hope, the problem statement is understood.
Here's my html:
<div id="myDiv">
<ul class="list" infinite-scroll='nextPage()' infinite-scroll-disabled="false">
<li data-ng-repeat="item in items">
<span>{{item}}</span>
</li>
</ul>
</div>
Regards
Related
you can see part of my code:
<ul>
<li ng-repeat="commentItem in comments track by $index">
<div style="float: left; width: 15%;;">
<img width="100%" src="{{commentItem.headImage}}">
</div>
</li>
</ul>
<ion-infinite-scroll ng-if="comment.loadMore" on-infinite="loadMoreComments()">
</ion-infinite-scroll>
when the 'comments' contains less data ,all looks normal.But when there are lots of data in the array(maybe 100 or more),the images will be showed in disorder.For example, the image should be in the third "li" will be showed in the fourth "li".Could anyone tell me why,please!
PS. I use the ionic.bundle.js,but I dont know it will cause something wrong or not. And when the event of ion-infinite-scroll be tiggered,I will push the new data into the "comments" array.
Tracking by $index is not a good idea. Can you track by commentItem.id (or another unique identifier on the commentItem) instead? I'm not sure if that will solve the problem but looking at that code snippet, that's the first thing I would try.
So,
I am rendering a basic list using ngRepeat, but need the first <li> to be static content, rather than being generated from the data array:
e.g.
<ul ng-repeat="item in items">
<li>This is text from the template and will always be the same.</li>
<li>{{item}}</li>
</ul>
I've also looked at using ng-repeat-start, but just can't quite get to a solution.
It is a common misconception that people want to use ng-repeat on the parent element, when in fact you use it on the actual elements that do the repeating.
You just need to change it to:
<ul>
<li>This is text from the template and will always be the same.</li>
<li ng-repeat="item in items">{{item}}</li>
</ul>
I am using angular ui drop down element
<div class="dropdown" >
<a ng-click="getTypes();" dropdown-toggle> Add a Type</a>
<ul class="dropdown-menu">
<li ng-repeat="type in Types"><a><b>{{type.sType }}:</b><em>{{type.sDescription}}</em></a> </li>
</ul>
</div>
all that i do is call a web service and populate Types all works fine! But when i add the above code in my htm the div below it starts throwing the exception of max digest reached.
the div below the drop down code(as written above) simply consists of few editable segments with icons and their visibility is controlled by ng-show and ng-hide when the use click a button
say on click of 1st segment i set a variable to true by using ng-click and depending on this variable i show or hide segments by using ng-show and ng-hide
so my doubt is that without the drop down code written above my ng-show and ng-hide work completely fine but the moment i try to use the drop down directive of angular ui i start getting this exception when i click on the buttons . please help.
Edit below is the code which follows basically user clicks on icons to reorder the elements that are appearing in the ng-repeat list and from the drop down which is above the user can add elements to this list
<ul class="repeatList text-center">
<li ng-repeat="widgets in leftWidgets" widget widgets="widgets"
class="wArea">
<a href="" class="icon-remove-circle pull-right" ng-show="editMode" ng-click="deleteWidget(leftWidgets);"
title="Delete Widget">
</a>
<a href="" class="icon-chevron-up slideUpIcon" ng-click="shiftUp(widgets,leftWidgets);"
ng-show="editMode">
</a >
<a href="" class="icon-chevron-down slideDownIcon" ng-click="shiftDown(widgets,leftWidgets);"
ng-show="editMode">
</a>
</li>
</ul>
kept doing hit and trial and found that using empty anchor tags was causing the problem. i.e. i had attached ng-click events to
text //empty href
the moment i changed them to span all worked fine! dont know why the empty "a" tags caused the problem but it will be great if any one can shed some light on the reasons for the above run time angular js exception. the link below is a useful
How to Troubleshoot Angular "10 $digest() iterations reached" Error
thanks!
I have a huge JSON object tree with two levels. First level has around 500 elements, and each element contains an average of 100 child elements.
I want to display the first level of the tree and I am doing it with a simple ng-repeat. When the user clicks on the element I want to display the child elements of that element. If I use a span ng-switch or a ng-show to show/hide child elements when the page first renders it freezes for around 10 seconds while generating all the HTML.
It doesn't sound like the right solution. There must be a different way of doing it, but I can't figure out. Anyone knows?
I have explained most in my comment, and here is a working plunker:
http://plunker.co/edit/RSZwfLlsCJ68MUkACbdp?p=preview
the new ng-if directive will do what you want
<h1>ng-if</h1> <h5>Click on the level to expand</h5>
<div class="well">
<ul class="nav nav-list" ng-repeat="(attr,element) in tree">
<li ng-click="expand=!expand" ng-class="{'active':expand}"><a>{{element.name}}</a></li>
<ul ng-if="expand" class="nav nav-list">
<li ng-repeat="item in element.items">{{item.name}}</li>
</ul>
</ul>
</div>
you can also do this in the "old-way" with ng-show using new ternary operator or its alternative expr && if_true || if_false
<h1>old-way</h1> <h5>Click on the level to expand</h5>
<small>use ternary operator or <pre>expand && element.items || []</pre></small>
<div class="well">
<ul class="nav nav-list" ng-repeat="(attr,element) in tree">
<li ng-click="expand=!expand" ng-class="{'active':expand}"><a>{{element.name}}</a></li>
<ul ng-show="expand" class="nav nav-list">
<li ng-repeat="item in (expand ? element.items : [])">{{item.name}}</li>
<!--<li ng-repeat="item in (expand && element.items || [])">{{item.name}}</li>-->
</ul>
</ul>
</div>
See this answer on ng-repeat performance. Essentially, it just takes a long time since Angular's ng-repeat, and basically all other directives, are set up to always look for updates in the whole JSON structure. So if you have lots of data and don't need live updates in the HTML view when changing the JSON, I wouldn't recommend using AngularJS. Generally, AngularJS performance also depends a lot on the browser and its JavaScript engine.
Alternatively, you could divide your JSON into subparts and then use pagination to display it.
I would recommend to fetch the data gradually from the server. Use server-side pagination and retrieve only the fields that you are going to display. Then, when a user clicks on one of the first level items, you can do another XHR to the server with the new data. I had similar requirements for a project and that solved the latency issue.
Regards,
Agustin.
I would like to know if there is a way to do a function call after all the nested ng-repeats have been loaded?
<ul class="topLevel" ng-repeat='item in standardContent'>
<li><input type='checkbox'><img class="inputImage" src="pictures/library.png"/><span>{{item.title}}</span>
<ul class="middleLevel" ng-repeat='child in item.children'>
<li><input type='checkbox'><img class="inputImage" src="pictures/library.png"/><span>{{child.title}}</span>
<ul class="middleLevel" ng-repeat='gChild in child.children'>
<li><input type='checkbox'><img class="inputImage" src='pictures/bigFolder.png'/><span>{{gChild.title}}</span>
<ul class="middleLevel" ng-repeat='ggChild in gChild.children'>
<li populate-src><input type='checkbox'><img class="inputImage"/><span>{{ggChild.title}}</span>
<ul class="middleLevel" ng-repeat='gggChild in ggChild.children'>
<li populate-src ><input type='checkbox'><img class="inputImage"/><span>{{gggChild.title}}</span></li>...
The array of object to be fed into the standardContent of the ul.topLevel has varied depth, and the img in each li has different image depending on its depth in the list. I have tried to create a directive and push all of the elements into a stack in order to determine the depth of the specific element. But I am not able to find a way to call a function after all the ng-repeats have been loaded to call the function to check the stack. Is there any way that I could do that?
That looks pretty badass :)
Try to watch the $last value in the last ng-repeat. If its true you know that reached the end.
Actually I'm not sure, you might need to watch all repeats. If it so write your own ng-repeat which yields at every $last === true and watch/count the yields.