.iconfont-mixin() {
    display: inline-block;
    color: @icon-color;
    font-style: normal;
    line-height: 0;
    text-align: center;
    text-transform: none;
    vertical-align: -0.125em; // for SVG icon, see https://blog.prototypr.io/align-svg-icons-to-text-and-say-goodbye-to-font-icons-d44b3d7b26b4
    text-rendering: optimizelegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    > * {
        line-height: 1;
    }
    svg {
        display: inline-block;
    }
    &::before {
        display: none; // dont display old icon.
    }
    & &-icon {
        display: block;
    }
}

// for iconfont font size
// fix chrome 12px bug, support ie
.iconfont-size-under-12px(@size, @rotate: 0deg) {
    display: inline-block;

    @font-scale: unit(@size / 12px);
    font-size: 12px;
    // IE9
    font-size: ~"@{size} \9";
    transform: scale(@font-scale) rotate(@rotate);
    :root & {
        font-size: @font-size-sm; // reset IE9 and above
    }
}