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

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

其他回答

下面是一个用于截断文本的自定义过滤器。它的灵感来自于EpokK的解决方案,但根据我的需求和口味进行了修改。

angular.module('app').filter('truncate', function () {

    return function (content, maxCharacters) {

        if (content == null) return "";

        content = "" + content;

        content = content.trim();

        if (content.length <= maxCharacters) return content;

        content = content.substring(0, maxCharacters);

        var lastSpace = content.lastIndexOf(" ");

        if (lastSpace > -1) content = content.substr(0, lastSpace);

        return content + '...';
    };
});

这里是单元测试,所以你可以看到它应该如何表现:

describe('truncate filter', function () {

    var truncate,
        unfiltered = " one two three four ";

    beforeEach(function () {

        module('app');

        inject(function ($filter) {

            truncate = $filter('truncate');
        });
    });

    it('should be defined', function () {

        expect(truncate).to.be.ok;
    });

    it('should return an object', function () {

        expect(truncate(unfiltered, 0)).to.be.ok;
    });

    it('should remove leading and trailing whitespace', function () {

        expect(truncate(unfiltered, 100)).to.equal("one two three four");
    });

    it('should truncate to length and add an ellipsis', function () {

        expect(truncate(unfiltered, 3)).to.equal("one...");
    });

    it('should round to word boundaries', function () {

        expect(truncate(unfiltered, 10)).to.equal("one two...");
    });

    it('should split a word to avoid returning an empty string', function () {

        expect(truncate(unfiltered, 2)).to.equal("on...");
    });

    it('should tolerate non string inputs', function () {

        expect(truncate(434578932, 4)).to.equal("4345...");
    });

    it('should tolerate falsey inputs', function () {

        expect(truncate(0, 4)).to.equal("0");

        expect(truncate(false, 4)).to.equal("fals...");
    });
});

你可以使用这个npm模块:https://github.com/sparkalow/angular-truncate

将截断过滤器注入到你的应用模块中,如下所示:

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

在你的应用程序中这样应用过滤器:

{{ text | characters:20 }} 

我发现最简单的解决方案是让材料设计(1.0.0-rc4)来做这项工作。md-input-container将为您完成这项工作。它连接了字符串,添加了省略,它还有一个额外的好处,允许你点击它来获得全文,所以它是整个玉米卷饼。您可能需要设置md-input-container的宽度。

HTML:

<md-input-container>
   <md-select id="concat-title" placeholder="{{mytext}}" ng-model="mytext" aria-label="label">
      <md-option ng-selected="mytext" >{{mytext}}
      </md-option>
   </md-select>
</md-input-container>

CS:

#concat-title .md-select-value .md-select-icon{
   display: none; //if you want to show chevron remove this
}
#concat-title .md-select-value{
   border-bottom: none; //if you want to show underline remove this
}

如果你有两个绑定{{item.name}}和{{item.directory}}。

并且希望将数据显示为一个后跟名称的目录,假设目录为“/root”,名称为“Machine”(/root- Machine)。

{{[item.directory]+[isLast ? '': '/'] + [ item.name]  | limitTo:5}}
Use this in your html - {{value | limitTocustom:30 }}

and write this custom filter in your angular file,

app.filter('limitTocustom', function() {
    'use strict';
    return function(input, limit) {
        if (input) {
            if (limit > input.length) {
                return input.slice(0, limit);
            } else {
                return input.slice(0, limit) + '...';
            }
        }
    };
});

// if you initiate app name by variable app. eg: var app = angular.module('appname',[])