使用AngularJS限制字符串的长度

我有以下几点:

<div>{{modal.title}}</div>

有没有一种方法可以限制字符串的长度，比如20个字符?

一个更好的问题是，有没有一种方法可以将字符串更改为截断并显示。如果超过20个字符?

当前回答

我创建了这个指令，很容易做到这一点，截断字符串到指定的限制，并添加了一个“显示更多/更少”切换。你可以在GitHub上找到它:https://github.com/doukasd/AngularJS-Components

它可以这样使用:

<p data-dd-collapse-text="100">{{veryLongText}}</p>

下面是指令:

// a directive to auto-collapse long text
app.directive('ddCollapseText', ['$compile', function($compile) {
return {
    restrict: 'A',
    replace: true,
    link: function(scope, element, attrs) {

        // start collapsed
        scope.collapsed = false;

        // create the function to toggle the collapse
        scope.toggle = function() {
            scope.collapsed = !scope.collapsed;
        };

        // get the value of the dd-collapse-text attribute
        attrs.$observe('ddCollapseText', function(maxLength) {
            // get the contents of the element
            var text = element.text();

            if (text.length > maxLength) {
                // split the text in two parts, the first always showing
                var firstPart = String(text).substring(0, maxLength);
                var secondPart = String(text).substring(maxLength, text.length);

                // create some new html elements to hold the separate info
                var firstSpan = $compile('<span>' + firstPart + '</span>')(scope);
                var secondSpan = $compile('<span ng-if="collapsed">' + secondPart + '</span>')(scope);
                var moreIndicatorSpan = $compile('<span ng-if="!collapsed">...</span>')(scope);
                var toggleButton = $compile('<span class="collapse-text-toggle" ng-click="toggle()">{{collapsed ? "less" : "more"}}</span>')(scope);

                // remove the current contents of the element
                // and add the new ones we created
                element.empty();
                element.append(firstSpan);
                element.append(secondSpan);
                element.append(moreIndicatorSpan);
                element.append(toggleButton);
            }
        });
    }
};
}]);

和一些CSS去它:

.collapse-text-toggle {
font-size: 0.9em;
color: #666666;
cursor: pointer;
}
.collapse-text-toggle:hover {
color: #222222;
}
.collapse-text-toggle:before {
content: '\00a0(';
}
.collapse-text-toggle:after {
content: ')';
}

2014-08-07 14:52:55

其他回答

更优雅的解决方案:

HTML:

<html ng-app="phoneCat">
  <body>
    {{ "AngularJS string limit example" | strLimit: 20 }}
  </body>
</html>

角代码:

 var phoneCat = angular.module('phoneCat', []);

 phoneCat.filter('strLimit', ['$filter', function($filter) {
   return function(input, limit) {
      if (! input) return;
      if (input.length <= limit) {
          return input;
      }

      return $filter('limitTo')(input, limit) + '...';
   };
}]);

演示:

http://code-chunk.com/chunks/547bfb3f15aa1/str-limit-implementation-for-angularjs

2014-12-01 05:28:08

由于只在字符串长度超过限制时才需要省略号，因此使用ng-if添加省略号似乎比使用绑定更合适。

{{ longString | limitTo: 20 }}<span ng-if="longString.length > 20">&hellip;</span>

2016-02-12 20:49:22

如果你想要这样的东西:InputString => StringPart1…StringPart2

HTML:

<html ng-app="myApp">
  <body>
    {{ "AngularJS string limit example" | strLimit: 10 : 20 }}
  </body>
</html>

角代码:

 var myApp = angular.module('myApp', []);

 myApp.filter('strLimit', ['$filter', function($filter) {
   return function(input, beginlimit, endlimit) {
      if (! input) return;
      if (input.length <= beginlimit + endlimit) {
          return input;
      }

      return $filter('limitTo')(input, beginlimit) + '...' + $filter('limitTo')(input, -endlimit) ;
   };
}]);

参数示例如下: beginLimit = 10 endLimit = 20

之前: ——/home/house/room/etc/ava_B0363852D549079E3720DF6680E17036.jar 后: - /home/hous…3720 df6680e17036.jar

2016-10-05 13:06:46

我知道这有点晚了，但在angularjs的最新版本(我使用的是1.2.16)中，limitTo过滤器支持字符串和数组，所以你可以像这样限制字符串的长度:

{{ "My String Is Too Long" | limitTo: 9 }}

它将输出:

My String

2014-05-09 14:42:17

有一个选择

.text { max-width: 140px; white-space: nowrap; overflow: hidden; padding: 5px; text-overflow: ellipsis;(...) } <div class="text">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Excepturi qui soluta labore! Facere nisi aperiam sequi dolores voluptatum delectus vel vero animi, commodi harum molestias deleniti, quasi nesciunt. Distinctio veniam minus ut vero rerum debitis placeat veritatis doloremque laborum optio, nemo quibusdam ad, sed cum quas maxime hic enim sint at quos cupiditate qui eius quam tempora. Ab sint in sunt consequuntur assumenda ratione voluptates dicta dolor aliquid at esse quaerat ea, veritatis reiciendis, labore repellendus rem optio debitis illum! Eos dignissimos, atque possimus, voluptatibus similique error. Perferendis error doloribus harum enim dolorem, suscipit unde vel, totam in quia mollitia.</div>

2016-08-29 09:49:37

使用AngularJS限制字符串的长度

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