owntone-server/web-src/src/components/ProgressBar.vue

<template>
  <div
    v-if="width > 0"
    class="progress-bar"
    :style="{ width: width_percent }"
  />
</template>

<script>
export default {
  name: 'ProgressBar',
  props: ['max', 'value'],

  computed: {
    width() {
      if (this.value > 0 && this.max > 0) {
        return parseInt((this.value * 100) / this.max)
      }
      return 0
    },
    width_percent() {
      return this.width + '%'
    }
  }
}
</script>