你好，能提供一下源码吗？初步判断是backgroundSize属性设置的问题

.setting-progress {

      position: relative;

      width: 100%;

      height: 100%;

      .progress-wrapper {

        width: 100%;

        height: 100%;

        @include center;

        padding: 0 px2rem(30);

        box-sizing: border-box;

        .progress {

          width: 100%;

          // 覆盖默认样式

          -webkit-appearance: none;

          height: px2rem(2);

          background: -webkit-linear-gradient(#999, #999) no-repeat, #ddd;

          background-size: 0 100%;

          &:focus {

            outline: none;

          }

          // 进度条的手柄

          &::-webkit-slider-thumb {

            -webkit-appearance: none;

            height: px2rem(20);

            width: px2rem(20);

            border-radius: 50%;

            background: white;

            box-shadow: 0 4px 4px 0 rgba(0, 0, 0, .15);

            border: px2rem(1) solid #ddd;

          }

        }

      }

onProgressInput(progress) {

      this.progress = progress

      this.$refs.progress.style.backgroundSize = '${this.progress}% 100%'

    },