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$('.checkbox_check').click(function() {
    $(this).parent().toggleClass('active');
});

/* Rounded sliders */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 10px;
    left: 40px;
    .no { color: $light-green; }
    .yes { color: #cdcdcd; }
    &.active {
        .no { color: #cdcdcd !important; }
        .yes { color: $light-green !important; }
    }

    input { display:none; }

    .slider {
        position: absolute;
        cursor: pointer;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: #cdcdcd;
        transition: .4s;
        &:before {
            position: absolute;
            content: "";
            height: 26px;
            width: 26px;
            left: -3px;
            bottom: -7px;
            background-color: $light-green;
            transition: .4s;
        }
    }

    input:checked + .slider {
        background-color: $light-green;
    }
      
    input:focus + .slider {
        box-shadow: 0 0 1px #CDCDCD;
    }
      
    input:checked + .slider:before {
        transform: translateX(40px);
    }
      
    /* Rounded sliders */
    .slider.round {
        border-radius: 34px;
    }
      
    .slider.round:before {
        border-radius: 50%;
    }

    span.answer {
        font-family: $primary-font;
        font-size: 1.6rem;
        font-weight: 400;
        position: relative;
        &.no {
            left: -35px;
            top: -5px;
        }
        &.yes {
            left: 55px;
            top: -5px;
        }
        &.active {
            color: $light-green;
        }
    }

}

<label class="switch">
    <span class="answer no">No</span>
    <span class="answer yes">Yes</span>
    <input type="checkbox" class="checkbox_check">
    <div class="slider round"></div>
</label>