:host >>> .popover { font-family: 'Lucida Console', Monaco, monospace; max-width: 550px; } :host >>> .popover-body { max-height: 400px; overflow-y: auto; overflow-x: auto; } :host >>> .popover-body .menu-entry { white-space: nowrap; } :host >>> .popover-body .menu-entry:hover { background-color: #f8f9fa; /* bootstrap color */ }