_animation-text-change.sass

@keyframes hide-text
    to
        font-size: 0

@keyframes dw-null

=animation-text-change($start, $selector, $font-size, $changes)
    // $font-size: 1rem
    $animation-names: 'dw-null'
    $animation-delays: '0s'
    $animation-durations: '0s'

    @each $delay, $duration, $text in $changes
        $name: 'dw-' + round($start) + '-' + random(100000000)
        $animation-names: $animation-names + ', ' + $name
        $animation-delays: $animation-delays + ', ' + $delay
        $animation-durations: $animation-durations + ', ' + $duration

        @keyframes #{$name}
            to
                content: $text
                font-size: #{$font-size}

    #{$selector}
        animation-name: hide-text
        animation-delay: #{$start}s
        animation-duration: 0.01s
        animation-fill-mode: forwards

        &::after
            content: ''
            vertical-align: bottom
            animation-name: #{$animation-names}
            animation-delay: #{$animation-delays}
            animation-duration: #{$animation-durations}
            animation-fill-mode: forwards
            animation-direction: alternate