Angular dynamic background images

You should do that as the +Günter Zöchbauer second part answer generates unwanted supplementary style background-position: initial and background-size: initial on Safari at least.

Note that I only set the background-image style:

<div [style.background-image]="'url(/img/' + item.img + ')'"
 [style.width.px]="200" [style.height.px]="150p"></div>

Use instead

<div [ngStyle]="{background: 'url(/img/' + item.img + ')', width: '200px', height: '150px'"></div>

or

<div [style.background]="'url(/img/' + item.img + ')'"
    [style.width.px]="200" [style.height.px]="150p"></div>

See also In RC.1 some styles can't be added using binding syntax

<div id="component-id" [style.background-image]="'url(www.domain.com/path/'+bgImageVariable+')'">
    <!-- ... -->
</div>

or

<div id="component-id" [style.background-image]="'url('+bgImageVariable+')'">
    <!-- ... -->
</div>

you can use in second way by adding URL path in a single variable. for example

bgImageVariable="www.domain.com/path/img.jpg";