data- prefix gets stripped from bindings such as <div data-id="{{1}}"> #26406
Description
I'm submitting a...
[ ] Regression (a behavior that used to work and stopped working in a new release)
[x] Bug report
[ ] Performance issue
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question
[x] Other... Please describe: embarrassment
Current behavior
<button [attr.data-id]="'btn-' + type">action 1</button>
<button data-id="btn-{{type}}">action 2</button>
Expected behavior
There must be the same behavior
Minimal reproduction of the problem with instructions
https://stackblitz.com/edit/angular-w2nsvr?file=src/app/app.component.html
Environment
Angular version: 6