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Difference between ng-class and ng-style directives.

ng-style is used to interpolate javascript object into style attribute.

ng-style="{width: 10px}"

The above directive will be translated to style="width:10px".

ng-class directive translates your object into class attribute.

ng-class="{'highlight-class': isActive}"

The above template is translated to class="highlight-class" when isActive variable is true.

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