Popover arrow

<div class="container">
    <!-- The content -->
    ...

    <!-- Top left arrow -->
    <div class="container__arrow container__arrow--tl"></div>

    <!-- Top center arrow -->
    <div class="container__arrow container__arrow--tc"></div>

    <!-- Top right arrow -->
    <div class="container__arrow container__arrow--tr"></div>

    <!-- Right top arrow -->
    <div class="container__arrow container__arrow--rt"></div>

    <!-- Right center arrow -->
    <div class="container__arrow container__arrow--rc"></div>

    <!-- Right bottom arrow -->
    <div class="container__arrow container__arrow--rb"></div>

    <!-- Bottom left arrow -->
    <div class="container__arrow container__arrow--bl"></div>

    <!-- Bottom center arrow -->
    <div class="container__arrow container__arrow--bc"></div>

    <!-- Bottom right arrow -->
    <div class="container__arrow container__arrow--br"></div>

    <!-- Left top arrow -->
    <div class="container__arrow container__arrow--lt"></div>

    <!-- Left center arrow -->
    <div class="container__arrow container__arrow--lc"></div>

    <!-- Left bottom arrow -->
    <div class="container__arrow container__arrow--lb"></div>
</div>

.container {
                        /* Border */
                        border: 1px solid rgba(0, 0, 0, 0.3);

                        /* Used to position the arrow */
                        position: relative;
                    }

                    .container__arrow {
                        /* Size */
                        height: 16px;
                        width: 16px;

                        background-color: #fff;
                        position: absolute;
                    }

                    .container__arrow--tl {
                        /* Position at the top left corner */
                        left: 32px;
                        top: 0px;

                        /* Border */
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(50%, -50%) rotate(45deg);
                    }

                    .container__arrow--tc {
                        /* Position at the top center */
                        left: 50%;
                        top: 0px;

                        /* Border */
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

                    .container__arrow--tr {
                        /* Position at the top right corner */
                        right: 32px;
                        top: 0px;

                        /* Border */
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

                    .container__arrow--rt {
                        /* Position at the right top corner */
                        right: 0;
                        top: 32px;

                        /* Border */
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(50%, 50%) rotate(45deg);
                    }

                    .container__arrow--rc {
                        /* Position at the right center */
                        right: 0;
                        top: 50%;

                        /* Border */
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(50%, -50%) rotate(45deg);
                    }

                    .container__arrow--rb {
                        /* Position at the right bottom corner */
                        bottom: 32px;
                        right: 0;

                        /* Border */
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        border-top: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(50%, -50%) rotate(45deg);
                    }

                    .container__arrow--bl {
                        /* Position at the bottom left corner */
                        bottom: -16px;
                        left: 32px;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(50%, -50%) rotate(45deg);
                    }

                    .container__arrow--bc {
                        /* Position at the bottom center */
                        bottom: -16px;
                        left: 50%;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

                    .container__arrow--br {
                        /* Position at the bottom right corner */
                        bottom: -16px;
                        right: 32px;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-right: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

                    .container__arrow--lt {
                        /* Position at the left top corner */
                        left: 0;
                        top: 32px;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, 50%) rotate(45deg);
                    }

                    .container__arrow--lc {
                        /* Position at the left center */
                        left: 0;
                        top: 50%;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

                    .container__arrow--lb {
                        /* Position at the left bottom corner */
                        bottom: 32px;
                        left: 0;

                        /* Border */
                        border-bottom: 1px solid rgba(0, 0, 0, 0.3);
                        border-left: 1px solid rgba(0, 0, 0, 0.3);
                        transform: translate(-50%, -50%) rotate(45deg);
                    }

Popover arrow

See also

Arrow buttons

Tooltip