Creating a unique Angular filter involves combining different techniques and functionalities to tailor

Question

Creating a unique Angular filter involves combining different techniques and functionalities to tailor

Hey there! I'm just diving into the world of Angular JS and I'm looking to filter any Twitter text that comes back containing a hashtag, and turn that word into a clickable link.

For example:

If the returned twitter text is "The quick brown #fox jumps over the lazy #dog", I want it to appear as "The quick brown

<a href="page.link">#fox</a>

jumps over the lazy
<a href="page.link">#dog</a>

Here's the HTML code:

<ul class="list-unstyled">
    <li ng-repeat="tweet in tweets" class="striped">
        <p ng-bind-html="tweet.text | filter:hashtag"></p>
    </li>
</ul>

And here's the JavaScript code:

app.filter('hashtag', function(){


});

javascript angularjs angularjs-directive frontend angular-filters

Answer 1

Answer №1

To utilize a filter initially, you should call it in the following manner:

<p ng-bind-html="tweet.text | hashtag"></p>

Subsequently, to ensure your filter functions correctly, you can implement something like this:

(function() {
  "use strict";

  angular
    .module('app', ['ngSanitize'])
    .controller('MainCtrl', MainCtrl)
    .filter('hashtag', hashtag);

  MainCtrl.$inject = ['$scope'];

  function MainCtrl($scope) {
    $scope.tweets = [];

    for (var i = 0; i < 10; i++) {
      $scope.tweets.push({
        "text": "A text with hashtag #ex " + i + " another #ex " + (i + 1)
      })
    }
  }

  function hashtag() {
    return function(input) {
      if (!input) return;

      var regex = new RegExp('(#[^ ]*)', 'g');
      var matches = [];
      var match;
      while (match = regex.exec(input)) {
        matches.push(match[0]);
      }

      matches.forEach(function(match) {
        input = input.replace(new RegExp('(' + match + ')', 'g'), '<a href="page.link">$1</a>')
      });

      return input;
    };
  }
})();

<!DOCTYPE html>
<html ng-app="app">

<head>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular-sanitize.min.js"></script>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" />
</head>

<body ng-controller="MainCtrl">
  <ul class="list-unstyled">
    <li ng-repeat="tweet in tweets" class="striped">
      <p ng-bind-html="tweet.text | hashtag"></p>
    </li>
  </ul>
</body>

</html>

Answer 2

To utilize a filter initially, you should call it in the following manner:

<p ng-bind-html="tweet.text | hashtag"></p>

Subsequently, to ensure your filter functions correctly, you can implement something like this:

(function() {
  "use strict";

  angular
    .module('app', ['ngSanitize'])
    .controller('MainCtrl', MainCtrl)
    .filter('hashtag', hashtag);

  MainCtrl.$inject = ['$scope'];

  function MainCtrl($scope) {
    $scope.tweets = [];

    for (var i = 0; i < 10; i++) {
      $scope.tweets.push({
        "text": "A text with hashtag #ex " + i + " another #ex " + (i + 1)
      })
    }
  }

  function hashtag() {
    return function(input) {
      if (!input) return;

      var regex = new RegExp('(#[^ ]*)', 'g');
      var matches = [];
      var match;
      while (match = regex.exec(input)) {
        matches.push(match[0]);
      }

      matches.forEach(function(match) {
        input = input.replace(new RegExp('(' + match + ')', 'g'), '<a href="page.link">$1</a>')
      });

      return input;
    };
  }
})();

<!DOCTYPE html>
<html ng-app="app">

<head>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular-sanitize.min.js"></script>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" />
</head>

<body ng-controller="MainCtrl">
  <ul class="list-unstyled">
    <li ng-repeat="tweet in tweets" class="striped">
      <p ng-bind-html="tweet.text | hashtag"></p>
    </li>
  </ul>
</body>

</html>

Creating a unique Angular filter involves combining different techniques and functionalities to tailor

Answer №1

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