使用Angular.js创建表

Question

I am trying to create a table with Angular.js which will have cell's spanning many rows.

Example:

http://jsfiddle.net/famedriver/kDrc6/

Example data

var data = [{Colors: ["red","green","blue"]}]

Expected output

<table>
  <tr>
    <td rowspan="3">Colors</td>
    <td>red</td>
  </tr>
  <tr>
     <td>green</td>
  </tr>
  <tr>
     <td>blue</td>
  </tr>
 </table>

I have it working by using the ng-show directive. But that still renders an extra cell, just hidden. It would be ideal to have the table properly rendered.

ng-switch , as mentioned, won't work in certain elements with strict parsing (ie: a table which only allows certain tags)

Any advice?

Answer 1

Normally you could use ng-switch for something like this, which conditionally adds/removes things from the DOM, unlike ng-show/ng-hide which just hide/show things.

But ng-switch doesn't play nice with tables because it requires an extra element for the switch statement.

Luckily, someone made a directive called 'if' which just takes one attribute on an element and conditionally adds/removes it from the DOM. It's genius :-).

Here's an example of it (look in the 'Resources' panel on the side, I included it from github). http://jsfiddle.net/5zZ7e/ .

I also showed how you can make your controllers without global variables in there.

Answer 2

Answering question using more recent version of Angular.

As Andrew Joslin wrote, the ng-show hides the element (it applies display: none ). ng-switch removes non-matching elements instead of just hiding them. But it also requires extra element for switch-when expression.

Since the last answer, the ng-if has become a part of Angular, you no longer need an external library.

 (function(win) { angular.module('myApp', []) .controller("Tester", function($scope) { $scope.data = { Colors: ["red", "green", "blue"] } }) }(window)); 

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script> <div ng-app="myApp"> <h1>old code converted</h1> <p>Just converted to a newer AngularJS.</p> <table border="1" ng-controller="Tester"> <tbody ng-repeat='(what,items) in data'> <tr ng-repeat='item in items'> <td rowspan="{{items.length}}" ng-show="$first">{{what}}</td> <td>{{item}}</td> </tr> </tbody> </table> <h1>solution via ng-if</h1> <table border="1" ng-controller="Tester"> <tbody ng-repeat='(what,items) in data'> <tr ng-repeat='item in items'> <td rowspan="{{items.length}}" ng-if="$first">{{what}}</td> <td>{{item}}</td> </tr> </tbody> </table> </div>