abbriviate, ellipsis, filter, anguar

abbriviate.js

angular
        .module('myProject', [])
        .filter('abbreviate', function () {
            // Hello World | abbreviate:6:2 //->  'Hello...Wo'
            // Hello World | abbreviate:5 //->  'Hello...'
            return function(str, num, prefix) {
                if (str == null) { str = ''; }
                if (num == null) { num = str.length; }
                if (prefix == null) { prefix = 0; }

                if (num >= str.length) { return str; }

                num = num - prefix - 1;
                if (num < 0) { num = 0; }

                return str.substr(0, num) + '\u2026' + str.substr(-prefix, prefix);
            };
        });