justify-content

                                
<div id="wrap">
    <div class="flexArea jc-center">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>

    <div class="flexArea jc-start">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>

    <div class="flexArea jc-end">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>

    <div class="flexArea jc-between">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>

    <div class="flexArea jc-around">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>

    <div class="flexArea jc-evenly">
        <div class="flexItem"></div>
        <div class="flexItem"></div>
    </div>
</div>

                                        
#wrap{padding: 50px; box-sizing: border-box;
    .flexArea{display: flex;
        .flexItem{display: flex; width: 200px; height: 200px; max-width: 200px; font-size: 16px; font-family: 'Noto Sans'; 
        color: #fff; background-color: #000;
            +.flexItem{margin-left: 10px;}
        }
        &.jc-center{justify-content: center;}
        &.jc-start{justify-content: flex-start;}
        &.jc-end{justify-content: flex-end;}
        &.jc-between{justify-content: space-between;}
        &.jc-around{justify-content: space-around;}
        &.jc-evenly{justify-content: space-evenly;}
    }
}

                                        
#wrap{
    padding: 50px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

#wrap .flexArea {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
}

#wrap .flexArea .flexItem {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    width: 200px;
    height: 200px;
    max-width: 200px;
    font-size: 16px;
    font-family: 'Noto Sans';
    color: #fff;
    background-color: #000;
}

#wrap .flexArea .flexItem + .flexItem {
    margin-left: 10px;
}

#wrap .flexArea.jc-center {
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
}

#wrap .flexArea.jc-start {
    -webkit-box-pack: start;
        -ms-flex-pack: start;
            justify-content: flex-start;
}

#wrap .flexArea.jc-end {
    -webkit-box-pack: end;
        -ms-flex-pack: end;
            justify-content: flex-end;
}

#wrap .flexArea.jc-between {
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
}

#wrap .flexArea.jc-around {
    -ms-flex-pack: distribute;
        justify-content: space-around;
}

#wrap .flexArea.jc-evenly {
    -webkit-box-pack: space-evenly;
        -ms-flex-pack: space-evenly;
            justify-content: space-evenly;
}

Esc 혹은 우측 상단 X 버튼을 눌러 결과창을 닫을 수 있습니다.