Ghost/ghost/admin/app/components/gh-notification.hbs

<article class="gh-notification gh-notification-passive {{this.typeClass}}" {{on "animationend" this.closeOnFadeOut}} ...attributes>
    <div class="gh-notification-content" data-test-text="notification-content">
        <div class="gh-notification-header">
            <div class="gh-notification-icon">
                {{#if @message.icon}}
                    {{svg-jar @message.icon}}
                {{else}}
                    {{#if (eq @message.type "success")}}
                        {{svg-jar "check-circle-filled"}}
                    {{else if (eq @message.type "error")}}
                        {{svg-jar "warning-circle-filled"}}
                    {{else if (eq @message.type "warn")}}
                        {{svg-jar "warning-circle-filled"}}
                    {{else}}
                        {{svg-jar "check-circle-filled"}}
                    {{/if}}
                {{/if}}
            </div>
            <div>
                <span class="gh-notification-title">{{@message.message}}</span>
            </div>
        </div>
    </div>
    {{#if (or @message.description @message.actions)}}
    <div class="gh-notification-details">
        {{#if @message.description}}
            <p>{{@message.description}}</p>
        {{/if}}
        {{#if @message.actions}}
            <span class="gh-notification-actions">{{@message.actions}}</span>
        {{/if}}
    </div>
    {{/if}}
    <button class="gh-notification-close" data-test-button="close-notification" type="button" {{on "click" this.closeNotification}}>
        {{svg-jar "close"}}<span class="hidden">Close</span>
    </button>
</article>