AngularJS required that you use ng-href because there were issues with binding expressions to some types of DOM elements and attributes.
This problem doesn’t exist in Angular now.
The following will work as expected:
<a href="https://stackoverflow.com/questions/45508062/{{your expression here}}"></a>
You can also bind using the attr prefix like this:
<a [attr.href]="your expression here"></a>
As others have mentioned. If you are using routing and want to add a href attribute to a specific route. Use the routerLink directive as it will add the href attribute to <a> tags.