javascript - example - ¿Cómo usar el filtro en ng-if y variable?
ngif else angular 6 (3)
En este ejemplo, uso el filtro en la ng-repeat
, pero ¿cómo lo uso en una variable y ng-if
, algo como:
{{languages.length | filter: {available: true}}}
y
ng-if="languages.length == 0 | filter: {available: true}"
Ver Fiddle .
HTML
<div ng-controller="mainController">
<div>There are {{languages.length}} languages in total.</div>
<div>??? There are {{languages.length}} languages available.</div>
<div ng-if="languages.length == 0">??? Sorry, there are no languages available.</div>
<ol>
<li ng-repeat="language in languages | filter: {available: true}">{{language.name}}</li>
</ol>
</div>
AngularJS
$scope.languages = [
{id:1, name:"German", available: false},
{id:2, name:"English", available: true},
{id:3, name:"French", available: false},
{id:4, name:"Italian", available: true},
{id:5, name:"Spanish", available: false}
];
¿Puedes probar esto?
<div ng-controller="mainController">
<div>There are {{languages.length}} languages in total.</div>
<div>There are {{(languages|filter:{available:true}).length}} languages available.</div>
<div ng-if="(languages|filter:{available:true}).length == 0">Sorry, there are no languages available.</div>
<ol>
<li ng-repeat="language in languages | filter: {available: true}">{{language.name}}</li>
</ol>
</div>
Solo para actualizar la respuesta anterior, no es necesario filtrar tres veces, cree una nueva variable ''filtrada'' en el primer filtro:
<div ng-controller="mainController">
<div>There are {{languages.length}} languages in total.</div>
<div>There are {{(filtered = (languages|filter:{available:true})).length}} languages available.</div>
<div ng-if="filtered.length == 0">Sorry, there are no languages available.</div>
<ol>
<li ng-repeat="language in filtered">{{language.name}}</li>
</ol>
filtered=[{{filtered}}]
</div>
<div ng-if="(answerText|lowercase)==''true''">T</div>
<div ng-if="(answerText|lowercase)==''false''">F</div>
Esto funciona para mi