How to set the id attribute of a HTML element dynamically with angularjs (1.x)?

ngAttr directive can totally be of help here, as introduced in the official documentation

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>

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