Change dynamic background ion content IONIC-4


#1

I cant change dynamic background ion content IONIC-4.
I want use this:
<ion-content no-padding fullscreen [ngStyle]="{‘background’:'linear-gradient(to bottom, #4e4f52 0%,#191414 ’ + porcentage + ‘%)’}" >

But this not works.
I know that I can change the background in ion content with --background, but I need dynamic.

Thanks