openproject/frontend/app/components/wp-buttons/wp-button.template.html

<button id="{{ ::vm.buttonId }}"
        class="button {{ ::vm.buttonClass }}"
        title="{{ vm.label }}"
        ng-click="vm.performAction()"
        ng-attr-accesskey="{{ ::vm.accessKey }}"
        ng-disabled="vm.disabled || (!vm.isToggle() && vm.isActive())"
        ng-class="{ '-active': vm.isActive() }">
  <op-icon icon-classes="{{ ::vm.iconClass }} button--icon"></op-icon>
</button>