Answers for "ng-style with function"

ng-style

<input type="button" value="set color" ng-click="myStyle={color:'red'}">
<input type="button" value="set background" ng-click="myStyle={'background-color':'blue'}">
<input type="button" value="clear" ng-click="myStyle={}">
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<span ng-style="myStyle">Sample Text</span>
<pre>myStyle={{myStyle}}</pre>