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

<button id="{{ ::vm.buttonId }}"
        class="button"
        title="{{ vm.label }}"
        ng-click="vm.performAction()"
        ng-attr-accesskey="{{ ::vm.accessKey }}"
        ng-disabled="vm.disabled || vm.isActive()"
        ng-class="{ '-active': vm.isActive() }">
  <i class="{{ ::vm.iconClass }} button--icon"></i>
  <span class="hidden-for-sighted">{{ vm.label }}</span>
</button>