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

Similar questions

Firestore/Javascript error: FirebaseError - The data provided is invalid for the DocumentReference.set() function. An unsupported field value of 'undefined'

User-initiated closure of popup triggers error during Google sign in

Issue: ReactJS + MaterialUI + TypeScript - Property 'component' does not exist?Possible error in ReactJS: component property is

Issue with custom validator in Angular 6: setTimeout function not functioning as expected

Maximizing Efficiency of Vendor Bundle in Angular 2 with Webpack

Creating NextJS Route with Dynamic Links for Main Page and Subpages

Can I specify which modal or component will appear when I click on a component?

In JavaScript, is it possible to manually trigger a DOM update during consecutive prompts?

Storing data in MongoDB upon the emission of a Socket.io event

What is the best way to pass a dynamically generated component as the ng-content for another dynamically generated component?

What is the best way to determine which id has been clicked using jQuery?

Is it possible to invoke a Javascript function from a coffeescript file?

Utilize the Image URL for training your Tensorflow.js application

Utilize jQuery function within an HTML form

Utilizing jQuery to add a class to an element when a different one is hovered above

Utilize Google Maps to receive directions to a specific destination and discover current traffic conditions along the route using their comprehensive API

I have the ability to showcase information from a JSON file using AngularJS, although it may not be in the exact manner that

Difficulty encountered when applying a CSS class with JavaScript

Tips for presenting styled HTML content within a dynamic list using HTML and JavaScript

JavaScript code encounters a math calculator script error