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

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 1

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> 

Answer 2

This thing worked for me pretty well:

<div id="{{ 'object-' + $index }}"></div>