问题
I have some code that uses Polymer attributes on elements, for example:
<paper-drawer-panel force-narrow>
The way polymer works is that I can't simply say force-narrow="false" if I want to disable the attribute, it has to be removed altogether. Is there a way in Angular2 to conditionally remove the entire attribute? I can't seem to find any information on this topic. I could use ngIf and repeat the entire element with and without the attribute but I would rather not if possible. Thanks!
Edit - Why was this question marked and closed as a duplicate? I asked this question a month before the duplicate post in question. God this site sucks sometimes.
Edit 2 - I understand the rules, but still feel entitled to complain.
回答1:
Simple attribute binding does what you want:
[attr.force-narrow]="someField ? true : null"
the attribute is not removed when someField is false, only when it's null
来源：https://stackoverflow.com/questions/36240736/is-it-possible-to-conditionally-display-element-attributes-using-angular2