metro4/source/components/hamburger/hamburger.less

The front-end framework for Build responsive, mobile-first projects on the web with the first front-end component library in Metro Style

@import (once) "../../include/vars";
@import (once) "../../include/mixins";

.hamburger, .nav-button {
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 0;
    font-size: 14px;
    line-height: 36px;
    transition: @transition-short;
    background-color: transparent;
    color: @white;
    cursor: pointer;
    outline: none;
    width: 36px;
    height: 36px;

    .line {
        width: 30px;
        background-color: @white;
        display: block;
        transition: all 0.3s ease-in-out;
        height: 3px;
        margin: 4px auto;
    }

    &.dark {
        .line {
            background-color: @dark;
        }
    }
}

.hamburger, .nav-button {
    &.menu-down, &.chevron-down {
        .line:nth-child(2) {
            transition-delay: .3s;
        }

        &.active {
            .rotate(90deg);

            .line:nth-child(2) {
                opacity: 0;
                transition: none;
            }

            .line:nth-child(1), .line:nth-child(3) {
                width: 20px;
                transform-origin: right;
                margin: -4px 8px;
            }

            .line:nth-child(1) {
                .rotate(45deg);
                .translateY(6px);
            }

            .line:nth-child(3) {
                .rotate(-45deg);
                .translateY(-6px);
            }
        }
    }
    &.menu-up, &.chevron-up {
        .line:nth-child(2) {
            transition-delay: .3s;
        }

        &.active {
            .rotate(-90deg);

            .line:nth-child(2) {
                opacity: 0;
                transition: none;
            }

            .line:nth-child(1), .line:nth-child(3) {
                width: 20px;
                transform-origin: right;
                margin: -4px 8px;
            }

            .line:nth-child(1) {
                .rotate(45deg);
                .translateY(6px);
            }

            .line:nth-child(3) {
                .rotate(-45deg);
                .translateY(-6px);
            }
        }
    }
    &.arrow-left {
        &.active {
            .line:nth-child(1), .line:nth-child(3) {
                width: 20px;
                margin-left: 0;
            }

            .line:nth-child(1) {
                .rotate(-45deg);
            }

            .line:nth-child(3) {
                .rotate(45deg);
            }
        }
    }
    &.arrow-right {
        &.active {
            .line:nth-child(1), .line:nth-child(3) {
                width: 20px;
                margin-right: 0;
            }

            .line:nth-child(1) {
                .rotate(45deg);
            }

            .line:nth-child(3) {
                .rotate(-45deg);
            }
        }
    }
}