ng-if 및 variable에서의 필터 사용방법

ng-if 및 variable에서의 필터 사용방법

이 예에서는 에서 필터를 사용하고 있습니다만, 변수에서 필터를 사용하는 방법 및ng-if, 예를 들어 다음과 같습니다.

{{languages.length | filter: {available: true}}}

그리고.

ng-if="languages.length == 0 | filter: {available: true}"

「Feeld」를 참조해 주세요.

---

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>

각도 JS

$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}
];

이거 한번 먹어볼래?

<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>

이전 답변을 업데이트하기 위해 세 번 필터링할 필요가 없으며 첫 번째 필터에 새 변수 '필터링됨'을 생성할 필요가 없습니다.

<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>

http://jsfiddle.net/to7z06ma/18/

<div ng-if="(answerText|lowercase)=='true'">T</div>

<div ng-if="(answerText|lowercase)=='false'">F</div>

난 이거면 돼

언급URL : https://stackoverflow.com/questions/31455567/how-to-use-filter-in-ng-if-and-variable