How to correctly use the ternary operator in a directive?

Question

JavaScript

Good afternoon. Tell me how to correctly place curly braces and quotes, a little confused:

ng-style="{'border-top': muscleList.getParent(entry).level ==1 ? ' ' : '1px solid #dde2e7'}"

How to explicitly separate the colon in the style definition from the colon of the ternary operator?

Answer 1

Maybe so?

{'border-top': (muscleList.getParent(entry).level ==1 ? ' ' : '1px solid #dde2e7)'}