Question
Provided an HTML element of type div, how to set the value of its id
attribute, which is the concatenation of a scope variable and a string ?
Answer
ngAttr directive can totally be of help here, as introduced in the official
documentation
<https://docs.angularjs.org/guide/interpolation#-ngattr-for-binding-to- arbitrary-attributes>
For instance, to set the id attribute value of a div element, so that it
contains an index, a view fragment might contain
<div ng-attr-id="{{ 'object-' + myScopeObject.index }}"></div>
which would get interpolated to
<div id="object-1"></div>
