@angular2-material/progress-bar/progress-bar.html

Angular 2 Material progress-bar

<!-- The background div is named as such because it appears below the other divs and is not sized based on values. -->
<div class="md-progress-bar-background"></div>
<div class="md-progress-bar-buffer" [ngStyle]="_bufferTransform()"></div>
<div class="md-progress-bar-primary md-progress-bar-fill" [ngStyle]="_primaryTransform()"></div>
<div class="md-progress-bar-secondary md-progress-bar-fill"></div>