How can I hide/remove the containing <div> element when the value is empty:
<div class="small" ng-show="ID !== ''">{{ info.ID }} | </div>
Renders:
<div class="small">|</div>
Can I remove the <div> completely if empty? I've tried:
<div class="small" ng-show="!ID">{{ info.ID }}</div >
You are checking value of ID property which is not the ID within info object so use info.ID within the ng-show.
<div class="small" ng-show="info.ID">{{ info.ID }} | </div>
<!-- -----------------------^^^^^^^----------------------->
If you don't want to render the element itself then use ng-if directive since ng-show directive simply hide using some CSS.
<div class="small" ng-if="info.ID">{{ info.ID }} | </div>
<!-- ---------------------^^^^^^^----------------------->
If you only want to hide the element then use:
<div class="small" [hidden]="info?.ID">{{ info?.ID }}</div>
If you alse want to avoid rendering it (which is better in most cases) then use:
<div class="small" *ngIf="info?.ID">{{ info?.ID }}</div>
Use the Elvis operator otherwise you may get this mistake:
Can't get ID of null
Related
I have following code and try to use $index in delete function but it gives incorrect value of it.
<li ng-repeat="joinMember in data.teamMember | orderBy:'member.screenName || member.fname' ">
<div class="member-list-img">
<a ng-href="">
<img ng-src="{{joinMember.member.data.image ? (joinMember.member.data.imageType == 'avatar' ? '/public/images/avatars/' + joinMember.member.data.image : '/public/images/' + joinMember.member.data.image) : '/public/images/avatars/avatar-73.png'}}" width="100%" alt="{{joinMember.member.screenName ? joinMember.member.screenName : joinMember.member.fname + ' ' + joinMember.member.lname }}" />
</a>
</div>
<div class="member-list-cont">
<h4>
<a ng-href="#">
{{joinMember.member.screenName ? joinMember.member.screenName : joinMember.member.fname + ' ' + joinMember.member.lname }}
</a>
</h4>
<span>{{joinMember.created | date : "MMMM d, y"}}</span>
</div>
<div ng-if="data.canModify" class="membr-delete">
<a ng-href="">
<i class="fa fa-trash text_link" aria-hidden="true" ng-click="deleteTeamMember($parent.$index, joinMember.id)"></i>
</a>
</div>
</li>
That's because the directive ng-if creates a new scope for itself, when you refer to $parent, it access the immediate $parent's scope, i.e., the inner repeat expression's scope.
So if you want to achieve something you wanted like in the former, you may use this:
<div ng-repeat="i in list">
<div ng-repeat="j in list2">
<div ng-if="1">
({{$parent.$parent.$index}} {{$parent.$index}})
</div>
</div>
</div>
if you have more than one inner directives, you can use ng-init for storing $index in a variable for references in child scopes.
<div ng-repeat="i in list" ng-init="outerIndex=$index">
<div ng-repeat="j in list2" ng-init="innerIndex=$index">
<div ng-if="1">
({{outerIndex}} {{innerIndex}})
</div>
</div>
</div>
So try $parent.$parent.$index in your example and please check understanding the scopes
You are using $parent.$index in a div that have ng-if tag. which delete dom element(div) if condition is fall so that case you will receive incorrect $index value. but with ng-show it only add hide class to that div.
So try to ng-show if it is not important to remove div element instead just hide it.
Note:- You are also using orderBy filter in ng-repeat which will sort in only your DOM so if you will find incorrect object value in your controller.
As you can see in the official documentation of angularjs you should get a zero-based index via $index within a ng-repeat. Try the example by angularjs here. Try to debug data.teamMember in your controller to make sure that this is the correct array you'd like to iterate.
<div class="sunti_contain" ng-repeat="sunti in suntis track by $index">
<div class="individual_sunti" ng-click="update_ancestor(sunti)">
<!--needs a unique div#id via angularz-->
<div class="sunti_content" ng-bind="sunti.content"></div>
<div class="sunti_tags" ng-bind="sunti.tags"></div>
<div class="sunti_author" ng-bind="sunti.author"></div>
<div class="sunti_shortid" ng-bind="sunti.short_id"></div>
<div class="sunti_ancestor" ng-bind="sunti.ancestor"></div>
</div>
<div class="sunti_reply_carriage_wrapper">
<div class="sunti_reply_carriage" ng-show="!sunti.descendents.length">
<div class="individual_sunti reply_carriage_sunti" ng-repeat="descendent in sunti.descendents">
<div class="sunti_content" ng-bind="descendent.content"></div>
<div class="sunti_tags" ng-bind="descendent.tags"></div>
<div class="sunti_author" ng-bind="descendent.author"></div>
<div class="sunti_shortid" ng-bind="descendent.short_id"></div>
</div>
</div>
</div>
</div>
I want to only show the div.sunti_reply_carriage if there are any descendents rendered in the ng-repeat. If there are no descendents, I don't want the div sunti_reply_carriage to appear at all. However, the ng-show="!sunti.descendents.length" does not work, presumably because it's just outside/before the ng-repeat that references descendents in sunti.descendents
How can I do this?
ng-show="!sunti.descendents.length"
Above code does not show the following code block if length is greater than zero
Ex: If sunti.descendents.length is 1 then
!1 is false then ng-show="false"
If sunti.descendents.length is 0 then !0 is true then ng-show="true"
So, change the expression to ng-show="sunti.descendents.length"
You can use ng-if as well if you want to completely remove the code block from DOM if the expression evaluates to false.
<div class="sunti_reply_carriage" ng-show="!sunti.descendents.length">
<div class="individual_sunti reply_carriage_sunti" ng-repeat="descendent in sunti.descendents">
<div class="sunti_content" ng-bind="descendent.content"></div>
<div class="sunti_tags" ng-bind="descendent.tags"></div>
<div class="sunti_author" ng-bind="descendent.author"></div>
<div class="sunti_shortid" ng-bind="descendent.short_id"></div>
</div>
</div>
You can use sunti.descendents.length instead of !sunti.descendents.length
If length property returns 0 then it will be hidden because it is falsey value in JavaScript, if it will return some value i.e. a number then it will be shown because it is truthy value in JavaScript.
If you want to show or hide you can use ng-show or ng-hide directives, if you want to completely remove/insert the DOM conditionally then you can use the ng-if directive in this case.
Using the ng-show directive
<div class="sunti_reply_carriage_wrapper">
<div class="sunti_reply_carriage" ng-show="sunti.descendents.length">
<!-- code omitted for brevity -->
</div>
</div>
Using the ng-if directive
<div class="sunti_reply_carriage_wrapper">
<div class="sunti_reply_carriage" ng-if="sunti.descendents.length">
<!-- code omitted for brevity -->
</div>
</div>
I have a ng-repeat, which shows conditional sections of markup. However all the expression in the markup are still being parsed and therefore throwing exceptions when they are undefined.
E.G: if item.discriminator is VoteOnNodeRcNotification, the other ng-show will still parse, and for example {{ item.nodeCommentText }} won't exist
i.e: (inside the ng-repeat
<div ng-show="item.discriminator == 'VoteOnNodeRcNotification'" class="type-specific">
<a class="outer-link self-clear" ng-href="{{ nodeLink(item.nodeId, item.nodeText) }}">
<small class="rep-change-mag" ng-class="getAdjustedCss(item.amountAdjusted)">
{{ friendlyAmountAdjusted(item, item.amountAdjusted) }}
</small>
<p class="rep-change-assoc">
Edit accepted: {{ item.nodeText }}
</p>
</a>
</div>
<div ng-show="item.discriminator == 'VoteOnNodeCommentRcNotification'" class="type-specific">
<a class="outer-link self-clear" ng-href="{{ nodeLink(item.nodeCommentId, item.nodeCommentText) }}">
<small class="rep-change-mag" ng-class="getAdjustedCss(item.amountAdjusted)">
{{ friendlyAmountAdjusted(item, item.amountAdjusted) }}
</small>
<p class="rep-change-assoc">
Vote up: {{ item.nodeCommentText }}
</p>
</a>
</div>
You can use ''ng-if'' for that. Just like ng-show, but the content is not generated when the condition is falsy.
ng-show just shows/hides the element, so it still exists in the DOM and therefore will always be evaluated. You can either set a default value for item.discriminator in your controller. For example..
$scope.item = {};
$scope.item.discriminator = null;
null is still falsy and therefore will be hidden by ng-show, but won't throw an error because it is actually defined. Another options is to use ng-if instead of ng-show, which actually removes the element from the DOM when the expression is falsy
I have the template:
<div ng-repeat="CableFilterName in CableFilterNames">
<fieldset>
<legend>{{CableFilterName.filterName}}</legend>
<ul id="">
<li ng-repeat="filterValue in CableFilterName.filterValues">
<input type="checkbox"/> {{filterValue}}
<!-- <select> -->
</li>
</ul>
</fieldset>
</div>
where filterValue in nested ng-repeat has several different values. So question is how to define what is current filterValue-value and depending on it use checkbox or select or any arbitrary HTML ?
UPD:
filterValues = ['Cable System','Electrical', 'Lighting'];
To have a kind of if statement, you can use the ngSwitch directive in AngularJS :
http://docs.angularjs.org/api/ng.directive:ngSwitch
For example on your ngRepeat loop :
<div ng-switch on="filterValue">
<div ng-switch-when="value1">//Do what you want when "value1"</div>
<div ng-switch-when="value2">//Do what you want when "value2"</div>
...
<div ng-switch-default>//Do what you want by default</div>
</div>
I Hope it's what you want, I don't really understand what you try to achieve.
I would like to use ng-switch because I do not want the other elements that I do not want to show to be part of the DOM. That is why i did not use ng-hide/ng-show. In the example below, I would like to only have the span tag be in the DOM without the div wrappers from the ng-switch. What is the best way to accomplish this?
<div ng-switch on="user">
<div ng-switch-when="true">
<span>One</span>
</div>
<div ng-switch-when="false">
<span>Two</span>
</div>
</div>
You can use the ng-switch directive as a custom element and not specify the div in the first place. For example:
<ng-switch on="user">
<span ng-switch-when="true">One</span>
<span ng-switch-default>Two</span>
</ng-switch>
Here is a plunker to play around with: http://plnkr.co/edit/zni6raUWOguhQh9jDiY3
the solution provided by #ChrisAuer this still creates a wrapping element.
AFAIK you'd have to use a custome directive. You may want to use angular-ui if
<div ui-if="user">
<span>One</span>
</div>
<div ui-if="!user">
<span>Two</span>
</div>
Probably, in your case, you'd be fine using ng-show or ng-hide which only hide(display:none) the element - they don't remove it form the DOM.
<div ng-show="user"> <!-- same as ng-hide="!user" -->
<span>One</span>
</div>
<div ng-hide="user"> <!-- same as ng-show="!user" -->
<span>Two</span>
</div>
I would say use ng-if, like this:
<div>
<div ng-if="user==true">
<span>One</span>
</div>
<div ng-if="user==false">
<span>Two</span>
</div>
</div>
you can use <span> to prevent your html layout changing
because <span> is not like <div>, it won't take up any space.
<span ng-switch="user">
<span ng-switch-when="true">One</span>
<span ng-switch-default>Two</span>
</span>