<template>
  <div class="scroll">
    <div class="container" @mousemove="mousemove">
      <div class="base"></div>
      <div class="left" ref="left">
        <img src="../../static/image/kda-karsa.jpg" alt="">
      </div>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      posX: 0
    }
  },
  methods: {
    mousemove(e) {
      // 獲取x 坐標
      this.posX = e.offsetX 
    }
  },
  watch: {
    posX(curX) {
      this.$refs.left.style.width = `${curX}px`
    }  
  }
}
</script>
<style lang="scss" scoped>
.scroll{
  .container{
    width: 960px;
    height: 540px;
    background-color: #cccccc;
    position: relative;
    cursor: ew-resize;
    .base{
      position: absolute;
      width: 960px;
      height: 540px;
      top: 0;
      left: 0;
      background: url('../../static/image/kda-karsa-golden.jpg') no-repeat;
      background-size: 100%;
    }
    .left{
      position: absolute;
      width: 480px;
      height: 540px;
      overflow: hidden;
      top: 0;
      left: 0;
      img{
       width: 960px;
       height: 540px; 
      }
    }
  }
}
</style>