如何有条件地应用ng风格的动态值？

I would like to apply a background-color with ng-style conditionally when the color value can be updated from $scope.

当颜色值可以从$ scope更新时,我想有条件地应用具有ng风格的背景颜色。

Here are my variables in scope:

这是我的范围变量:

$scope.someone = { id: '1', name: 'John', color: '#42a1cd' };
$scope.mainId = 1;

Actually I don't use any condition to apply the background color, it is done with:

实际上我没有使用任何条件来应用背景颜色,它完成了:

<div ng-style="{'background-color': someone.color}">
    {{someone.name}}
</div>

The idea here is to apply this background color only when someone.id == mainId. I tried several solutions, but it does not seems to be the correct synthax:

这里的想法是仅在someone.id == mainId时应用此背景颜色。我尝试了几种解决方案,但它似乎不是正确的合成器:

ng-style="{{someone.id == mainId}} ? ('background-color': {{someone.color}}) : null"

ng-style =“{{someone.id == mainId}}?('background-color':{{someone.color}}):null”

ng-style="{ ('background-color': someone.color) : someone.id == mainId }"

ng-style =“{('background-color':someone.color):someone.id == mainId}”

JSFiddle for testing

Does someone have an idea of how I can achieve this?

有人知道如何实现这一目标吗?

3 个解决方案

#1

This seems to work fine.

这似乎工作正常。

ng-style="{'background-color': person.id === mainId ? person.color : ''}"

See updated fiddle with two people - the one with mainId has a background color, while the other doesn't: http://jsfiddle.net/fgc21e86/7/

看到两个人的更新小提琴 - mainId有一个背景颜色,而另一个没有:http://jsfiddle.net/fgc21e86/7/

#2

You may try like this

你可以这样试试

<div ng-app="myApp" ng-controller="MyCtrl">
  <div ng-style="{'background-color': getColor(someone)}">
    {{someone.name}}
  </div>
</div>

var myApp = angular.module('myApp', []);
myApp.controller('MyCtrl', ['$scope', function($scope) {
  $scope.someone = {
    id: 1,
    name: 'John',
    color: '#42a1cd'
  };
  $scope.getColor = function(someone) {

        if($scope.mainId === someone.id) {
        return someone.color;
      }
  }
  $scope.mainId = 1;
}]);

#3

You could do it like

你可以这样做

ng-style="someone.id == mainId ? {'background-color':'{{someone.color}}'} : {'background-color':'red'}"

Here's an updated fiddle http://jsfiddle.net/fgc21e86/9/

这是一个更新的小提琴http://jsfiddle.net/fgc21e86/9/

#1